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[4.2.y-ckt stable] Linux 4.2.8-ckt1 stable review

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  [4.2.y-ckt stable] Linux 4.2.8-ckt1 stable review Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 185/211] sctp: use the same clock as if sock source timestamps were on Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 067/211] dm: initialize non-blk-mq queue data before queue is used Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 153/211] of/fdt: fix error checking for earlycon address Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 167/211] selftests: kprobe: Choose an always-defined function to probe Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 077/211] megaraid_sas : SMAP restriction--do not access user memory from IOCTL code Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 103/211] scsi_sysfs: Fix queue_ramp_up_period return code Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 114/211] iio:magnetometer:bmc150_magn: sort entry alphabetically Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 093/211] memcg: fix thresholds for 32b architectures. Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 087/211] ALSA: hda - Add Intel Lewisburg device IDs Audio Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 168/211] selftests: Make scripts executable Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 116/211] net-sysfs: get_netdev_queue_index() cleanup Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 209/211] rhashtable: Fix walker list corruption Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 046/211] vTPM: fix memory allocation flag for rtce buffer at kernel boot Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 098/211] printk: prevent userland from spoofing kernel messages Kamal Mostafa <kamal@canonical.com> - 2016-01-05 20:50 +0100
    [PATCH 4.2.y-ckt 207/211] af_unix: Revert 'lock_interruptible' in stream receive code Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 192/211] phy: micrel: Fix finding PHY properties in MAC node. Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 194/211] sh_eth: fix kernel oops in skb_put() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 195/211] net: fix IP early demux races Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 211/211] KVM: x86: Reload pit counters for all channels when restoring state Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 191/211] ipv6: sctp: clone options to avoid use after free Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 201/211] bluetooth: Validate socket address length in sco_sock_bind(). Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 184/211] vxlan: fix incorrect RCO bit in VXLAN header Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 204/211] rhashtable: Enforce minimum size on initial hash table Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 208/211] tcp: restore fastopen with no data in SYN packet Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 181/211] gre6: allow to update all parameters via rtnl Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 199/211] net: check both type and procotol for tcp sockets Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 180/211] pppoe: fix memory corruption in padt work structure Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 190/211] r8152: fix lockup when runtime PM is enabled Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 210/211] KEYS: Fix race between read and revoke Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 189/211] net: qca_spi: fix transmit queue timeout handling Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 178/211] megaraid_sas: Make tape drives visible on PERC5 controllers Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 186/211] sctp: update the netstamp_needed counter when copying sockets Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 187/211] sctp: also copy sk_tsflags when copying the socket Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 183/211] ipv6: keep existing flags when setting IFA_F_OPTIMISTIC Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 196/211] pptp: verify sockaddr_len in pptp_bind() and pptp_connect() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 202/211] net: fix uninitialized variable issue Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 203/211] ipv6: automatically enable stable privacy mode if stable_secret set Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 200/211] net_sched: make qdisc_tree_decrease_qlen() work for non mq Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 188/211] net: cdc_mbim: add "NDP to end" quirk for Huawei E3372 Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 206/211] fou: clean up socket with kfree_rcu Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 182/211] atl1c: Improve driver not to do order 4 GFP_ATOMIC allocation Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 193/211] net: add validation for the socket syscall protocol argument Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:00 +0100
    [PATCH 4.2.y-ckt 166/211] vfio/platform: store mapped memory in region, instead of an on-stack copy Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 151/211] DT: mmc: sh_mmcif: fix "compatible" property text Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 169/211] thermal: exynos: Fix first temperature read after registering sensor Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 163/211] tracepoints: Fix documentation of RCU lockdep checks Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 165/211] ipv6: fix tunnel error handling Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 155/211] PCI: Set SR-IOV NumVFs to zero after enumeration Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 152/211] netfilter: nf_nat_redirect: add missing NULL pointer check Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 179/211] ARC: Fix silly typo in MAINTAINERS file Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 159/211] cpufreq: arm_big_little: fix frequency check when bL switcher is active Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 172/211] rtc: ds1307: Fix alarm programming for mcp794xx Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 173/211] NTB: fix 32-bit compiler warning Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 161/211] xprtrdma: Prevent loss of completion signals Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 177/211] TPM: Avoid reference to potentially freed memory Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 156/211] sparc/PCI: Add mem64 resource parsing for root bus Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 176/211] mvneta: add FIXED_PHY dependency Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 157/211] IB/core, cma: Make __attribute_const__ declarations sparse-friendly Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 171/211] perf trace: Fix documentation for -i Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 148/211] perf annotate: Fix 'annotate.use_offset' config variable usage Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 160/211] xprtrdma: Re-arm after missed events Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 158/211] ipv6: no CHECKSUM_PARTIAL on MSG_MORE corked sockets Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 162/211] qmi_wwan: fix entry for HP lt4112 LTE/HSPA+ Gobi 4G Module Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 164/211] net: fix percpu memory leaks Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 174/211] tpm_tis: free irq after probing Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 170/211] ipv4: fix a potential deadlock in mcast getsockopt() path Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 175/211] TPM: revert the list handling logic fixed in 398a1e7 Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 149/211] sunrpc: avoid warning in gss_key_timeout Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 150/211] MIPS: atomic: Fix comment describing atomic64_add_unless's return value. Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:10 +0100
    [PATCH 4.2.y-ckt 124/211] netfilter: remove dead code Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 127/211] i2c: img-scb: enable fencing for all versions of the ip Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 128/211] i2c: img-scb: do dummy writes before fifo access Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 147/211] spi: omap2-mcspi: disable other channels CHCONF_FORCE in prepare_message Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 139/211] ALSA: dice: correct variable types for __be32 data Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 130/211] i2c: img-scb: fix LOW and HIGH period values for the SCL clock Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 122/211] [media] vivid: Fix iteration in driver removal path Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 143/211] kconfig: Fix copy&paste error Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 133/211] packet: fix match_fanout_group() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 141/211] ALSA: fireworks: use u32 type for be32_to_cpup() macro Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 146/211] IB/core: avoid 32-bit warning Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 134/211] hsi: fix double kfree Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 145/211] RDMA/cxgb4: re-fix 32-bit build warning Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 137/211] ALSA: fireworks/bebob/oxfw/dice: enable to make as built-in Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 125/211] ipv4: Fix ip_local_out_sk by passing the sk into __ip_local_out_sk Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 123/211] devres: fix a for loop bounds check Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 132/211] i2c: img-scb: verify support for requested bit rate Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 138/211] drm: Fix return value of drm_framebuffer_init() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 100/211] fs, seqfile: always allow oom killer Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 129/211] i2c: img-scb: use DIV_ROUND_UP to round divisor values Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 126/211] ipv4: Fix ip_queue_xmit to pass sk into ip_local_out_sk Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 113/211] dax_io(): don't let non-error value escape via retval instead of EFAULT Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 136/211] regulator: arizona-ldo1: Fix handling of GPIO 0 Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 118/211] tools build: Fixup feature detection display function name Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 142/211] ALSA: bebob: use correct type for __be32 data Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 140/211] ALSA: dice: assign converted data to the same type of variable Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 092/211] mm/oom_kill.c: reverse the order of setting TIF_MEMDIE and sending SIGKILL Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 131/211] i2c: img-scb: Clear line and interrupt status before starting a transfer Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 135/211] hsi: omap_ssi_port: Prevent warning if cawake_gpio is not defined. Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 144/211] tcp: apply Kern's check on RTTs used for congestion control Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:20 +0100
    [PATCH 4.2.y-ckt 106/211] drivers: of: of_reserved_mem: fixup the alignment with CMA setup Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 086/211] tracefs: Fix refcount imbalance in start_creating() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 108/211] FS-Cache: Increase reference of parent after registering, netfs success Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 120/211] dmaengine: dw: convert to __ffs() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 119/211] wm831x_power: Use IRQF_ONESHOT to request threaded IRQs Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 097/211] proc: actually make proc_fd_permission() thread-friendly Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 111/211] binfmt_elf: Don't clobber passed executable's file header Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 110/211] FS-Cache: Handle a write to the page immediately beyond the EOF marker Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 109/211] FS-Cache: Don't override netfs's primary_index if registering failed Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 091/211] mm: slab: only move management objects off-slab for sizes larger than KMALLOC_MIN_SIZE Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 105/211] storvsc: Don't set the SRB_FLAGS_QUEUE_ACTION_ENABLE flag Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 095/211] arm64: bpf: fix mod-by-zero case Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 057/211] ACPI: Using correct irq when waiting for events Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 088/211] drm: Use userspace compatible type in fourcc_mod_code macro Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 112/211] fs/pipe.c: return error code rather than 0 in pipe_write() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 101/211] parisc: Fixes and cleanups in kernel uapi header files Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 090/211] toshiba_acpi: Initialize hotkey_event_type variable Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 063/211] drm/amdgpu: add some additional CZ revisions Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 094/211] arm64: bpf: fix div-by-zero case Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 099/211] lib/hexdump.c: truncate output in case of overflow Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 059/211] i2c: at91: manage unexpected RXRDY flag when starting a transfer Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 085/211] ALSA: hda - Apply pin fixup for HP ProBook 6550b Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 121/211] tcp: call sk_mark_napi_id() on the child, not the listener Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 107/211] drm/ast: Initialized data needed to map fbdev memory Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 115/211] ALSA: pcm: remove structure member of 'struct snd_pcm_hwptr_log *' type because this structure had been removed Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 089/211] scsi: restart list search after unlock in scsi_remove_target Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 084/211] timers: Use proper base migration in add_timer_on() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 078/211] xtensa: fix secondary core boot in SMP Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 102/211] perf: Fix inherited events vs. tracepoint filters Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 117/211] crypto: crc32c-pclmul - use .rodata instead of .rotata Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:30 +0100
    [PATCH 4.2.y-ckt 079/211] recordmcount: Fix endianness handling bug for nop_mcount Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 052/211] [media] media: vb2 dma-sg: Fully cache synchronise buffers in prepare and finish Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 073/211] drm/amdgpu: Make amdgpu_mn functions inline Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 027/211] staging/dgnc: fix info leak in ioctl Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 066/211] megaraid_sas: Do not use PAGE_SIZE for max_sectors Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 080/211] recordmcount: arm64: Replace the ignored mcount call into nop Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 064/211] spi/spi-xilinx: Fix race condition on last word read Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 049/211] drm/amdgpu/gfx8: set TC_WB_ACTION_EN in RELEASE_MEM packet Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 081/211] KVM: VMX: fix SMEP and SMAP without EPT Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 013/211] bridge: fix netlink max attr size Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 051/211] [media] media: vb2 dma-contig: Fully cache synchronise buffers in prepare and finish Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 061/211] ALSA: hda - Disable 64bit address for Creative HDA controllers Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 065/211] megaraid_sas: Expose TAPE drives unconditionally Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 015/211] task_work: remove fifo ordering guarantee Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 072/211] xtensa: fixes for configs without loop option Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 076/211] PCI: spear: Fix dw_pcie_cfg_read/write() usage Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 021/211] KEYS: Don't permit request_key() to construct a new keyring Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 083/211] thermal: exynos: Fix unbalanced regulator disable on probe failure Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 062/211] MAINTAINERS: Add public mailing list for ARC Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 074/211] ALSA: hda - Fix lost 4k BDL boundary workaround Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 058/211] ACPI / PM: Fix incorrect wakeup IRQ setting during suspend-to-idle Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 012/211] net: bcmgenet: Delay PHY initialization to bcmgenet_open() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 069/211] Revert "dm mpath: fix stalls when handling invalid ioctls" Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 060/211] ALSA: hda/realtek - Dell XPS one ALC3260 speaker no sound after resume back Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 070/211] drm/i915: add quirk to enable backlight on Dell Chromebook 11 (2015) Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 016/211] ebpf: fix fd refcount leaks related to maps in bpf syscall Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 068/211] mtd: blkdevs: fix potential deadlock + lockdep warnings Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 050/211] spi: dw: explicitly free IRQ handler in dw_spi_remove_host() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 071/211] crypto: algif_hash - Only export and import on sockets with data Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 053/211] [media] media/v4l2-ctrls: fix setting autocluster to manual with VIDIOC_S_CTRL Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 054/211] i2c: at91: fix write transfers by clearing pending interrupt first Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 048/211] tpm, tpm_tis: fix tpm_tis ACPI detection issue with TPM 2.0 Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 075/211] tracing: Update instance_rmdir() to use tracefs_remove_recursive Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:40 +0100
    [PATCH 4.2.y-ckt 043/211] iommu/arm-smmu: Fix error checking for ASID and VMID allocation Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 022/211] ARM: OMAP2+: board-generic: Remove stale of_irq macros Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 030/211] HID: core: Avoid uninitialized buffer access Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 039/211] f2fs crypto: allocate buffer for decrypting filename Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 031/211] [media] v4l2-compat-ioctl32: fix alignment for ARM64 Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 004/211] x86/xen: Do not clip xen_e820_map to xen_e820_map_entries when sanitizing map Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 035/211] ubi: fastmap: Implement produce_free_peb() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 005/211] drm/radeon: add quirk for MSI R7 370 Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 037/211] drm/i915: Fix userptr deadlock with aliased GTT mmappings Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 047/211] tpm, tpm_crb: fix unaligned read of the command buffer address Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 044/211] jbd2: fix checkpoint list cleanup Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 032/211] mtd: mtdpart: fix add_mtd_partitions error path Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 028/211] ipv6: Fix IPsec pre-encap fragmentation check Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 023/211] vxlan: set needed headroom correctly Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 002/211] drivers: usb :fsl: Implement Workaround for USB Erratum A007792 Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 045/211] [PATCH] fix calculation of meta_bg descriptor backups Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 042/211] iommu/vt-d: Fix ATSR handling for Root-Complex integrated endpoints Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 003/211] drivers: usb: fsl: Workaround for USB erratum-A005275 Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 033/211] [media] v4l2-ctrls: arrays are also considered compound controls Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 034/211] [media] media: v4l2-ctrls: Fix 64bit support in get_ctrl() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 006/211] drm/radeon: add quirk for ASUS R7 370 Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 029/211] KVM: svm: unconditionally intercept #DB Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 038/211] integrity: prevent loading untrusted certificates on the IMA trusted keyring Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 036/211] drm/i915: Only update the current userptr worker Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 041/211] lockd: create NSM handles per net namespace Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 040/211] spi: ti-qspi: Fix data corruption seen on r/w stress test Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 024/211] isdn_ppp: Add checks for allocation failure in isdn_ppp_open() Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 025/211] ppp, slip: Validate VJ compression slot parameters completely Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 026/211] [media] media/vivid-osd: fix info leak in ioctl Kamal Mostafa <kamal@canonical.com> - 2016-01-05 21:50 +0100
    [PATCH 4.2.y-ckt 019/211] KEYS: Fix race between key destruction and finding a keyring by name Kamal Mostafa <kamal@canonical.com> - 2016-01-05 22:00 +0100
    [PATCH 4.2.y-ckt 020/211] KEYS: Fix crash when attempt to garbage collect an uninstantiated keyring Kamal Mostafa <kamal@canonical.com> - 2016-01-05 22:00 +0100
    [PATCH 4.2.y-ckt 018/211] scsi_dh: fix randconfig build error Kamal Mostafa <kamal@canonical.com> - 2016-01-05 22:00 +0100
    [PATCH 4.2.y-ckt 017/211] netlink, mmap: fix edge-case leakages in nf queue zero-copy Kamal Mostafa <kamal@canonical.com> - 2016-01-05 22:00 +0100

Page 6 of 10 — ← Prev page 1 … 4 5 [6] 7 8 … 10  Next page →

#1302051 — [PATCH 4.2.y-ckt 106/211] drivers: of: of_reserved_mem: fixup the alignment with CMA setup

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jason Liu <r64343@freescale.com>

commit 1cc8e3458b5110253c8f5aaf1890d5ffea9bb7b7 upstream.

There is an alignment mismatch issue between the of_reserved_mem and
the CMA setup requirement. The of_reserved_mem will try to get the
alignment value from the DTS and pass it to __memblock_alloc_base to
do the memory block base allocation, but the alignment value specified
in the DTS may not satisfy the CAM setup requirement since CMA setup
required the alignment as the following in the code:

align = PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order);

The sanity check in the function of rmem_cma_setup will fail if the
alignment does not setup correctly and thus CMA will fail to setup.

This patch is to fixup the alignment to meet the CMA setup required.

Mailing-list-thread: https://lkml.org/lkml/2015/11/9/138
Signed-off-by: Jason Liu <r64343@freescale.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/of/of_reserved_mem.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 726ebe7..56c23ee 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -123,6 +123,10 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
 		align = dt_mem_next_cell(dt_root_addr_cells, &prop);
 	}
 
+	/* Need adjust the alignment to satisfy the CMA requirement */
+	if (IS_ENABLED(CONFIG_CMA) && of_flat_dt_is_compatible(node, "shared-dma-pool"))
+		align = max(align, (phys_addr_t)PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order));
+
 	prop = of_get_flat_dt_prop(node, "alloc-ranges", &len);
 	if (prop) {
 
-- 
1.9.1

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#1302052 — [PATCH 4.2.y-ckt 086/211] tracefs: Fix refcount imbalance in start_creating()

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Borkmann <daniel@iogearbox.net>

commit d227c3ae4e94e5eb11dd780a811f59e1a7b74ccd upstream.

In tracefs' start_creating(), we pin the file system to safely access
its root. When we failed to create a file, we unpin the file system via
failed_creating() to release the mount count and eventually the reference
of the singleton vfsmount.

However, when we run into an error during lookup_one_len() when still
in start_creating(), we only release the parent's mutex but not so the
reference on the mount.

F.e., in securityfs_create_file(), after doing simple_pin_fs() when
lookup_one_len() fails there, we infact do simple_release_fs(). This
seems necessary here as well.

Same issue seen in debugfs due to 190afd81e4a5 ("debugfs: split the
beginning and the end of __create_file() off"), which seemed to got
carried over into tracefs, too. Noticed during code review.

Link: http://lkml.kernel.org/r/68efa86101b778cf7517ed7c6ad573bd69f60ec6.1446672850.git.daniel@iogearbox.net

Fixes: 4282d60689d4 ("tracefs: Add new tracefs file system")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 fs/tracefs/inode.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
index cbc8d5d..c66f242 100644
--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -340,8 +340,12 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
 		dput(dentry);
 		dentry = ERR_PTR(-EEXIST);
 	}
-	if (IS_ERR(dentry))
+
+	if (IS_ERR(dentry)) {
 		mutex_unlock(&parent->d_inode->i_mutex);
+		simple_release_fs(&tracefs_mount, &tracefs_mount_count);
+	}
+
 	return dentry;
 }
 
-- 
1.9.1

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#1302053 — [PATCH 4.2.y-ckt 108/211] FS-Cache: Increase reference of parent after registering, netfs success

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kinglong Mee <kinglongmee@gmail.com>

commit 86108c2e34a26e4bec3c6ddb23390bf8cedcf391 upstream.

If netfs exist, fscache should not increase the reference of parent's
usage and n_children, otherwise, never be decreased.

v2: thanks David's suggest,
 move increasing reference of parent if success
 use kmem_cache_free() freeing primary_index directly

v3: don't move "netfs->primary_index->parent = &fscache_fsdef_index;"

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 fs/fscache/netfs.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/fscache/netfs.c b/fs/fscache/netfs.c
index 6d941f5..458cc96 100644
--- a/fs/fscache/netfs.c
+++ b/fs/fscache/netfs.c
@@ -47,9 +47,6 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
 	netfs->primary_index->netfs_data	= netfs;
 	netfs->primary_index->flags		= 1 << FSCACHE_COOKIE_ENABLED;
 
-	atomic_inc(&netfs->primary_index->parent->usage);
-	atomic_inc(&netfs->primary_index->parent->n_children);
-
 	spin_lock_init(&netfs->primary_index->lock);
 	INIT_HLIST_HEAD(&netfs->primary_index->backing_objects);
 
@@ -62,6 +59,9 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
 			goto already_registered;
 	}
 
+	atomic_inc(&netfs->primary_index->parent->usage);
+	atomic_inc(&netfs->primary_index->parent->n_children);
+
 	list_add(&netfs->link, &fscache_netfs_list);
 	ret = 0;
 
@@ -71,8 +71,7 @@ already_registered:
 	up_write(&fscache_addremove_sem);
 
 	if (ret < 0) {
-		netfs->primary_index->parent = NULL;
-		__fscache_cookie_put(netfs->primary_index);
+		kmem_cache_free(fscache_cookie_jar, netfs->primary_index);
 		netfs->primary_index = NULL;
 	}
 
-- 
1.9.1

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#1302054 — [PATCH 4.2.y-ckt 120/211] dmaengine: dw: convert to __ffs()

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

commit 39416677b95bf1ab8bbfa229ec7e511c96ad5d0c upstream.

We replace __fls() by __ffs() since we have to find a *minimum* data width that
satisfies both source and destination.

While here, rename dwc_fast_fls() to dwc_fast_ffs() which it really is.

Fixes: 4c2d56c574db (dw_dmac: introduce dwc_fast_fls())
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/dma/dw/core.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index bedce03..4287c7c 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -163,7 +163,7 @@ static void dwc_initialize(struct dw_dma_chan *dwc)
 
 /*----------------------------------------------------------------------*/
 
-static inline unsigned int dwc_fast_fls(unsigned long long v)
+static inline unsigned int dwc_fast_ffs(unsigned long long v)
 {
 	/*
 	 * We can be a lot more clever here, but this should take care
@@ -712,7 +712,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
 			   dw->data_width[dwc->dst_master]);
 
 	src_width = dst_width = min_t(unsigned int, data_width,
-				      dwc_fast_fls(src | dest | len));
+				      dwc_fast_ffs(src | dest | len));
 
 	ctllo = DWC_DEFAULT_CTLLO(chan)
 			| DWC_CTLL_DST_WIDTH(dst_width)
@@ -791,7 +791,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
 
 	switch (direction) {
 	case DMA_MEM_TO_DEV:
-		reg_width = __fls(sconfig->dst_addr_width);
+		reg_width = __ffs(sconfig->dst_addr_width);
 		reg = sconfig->dst_addr;
 		ctllo = (DWC_DEFAULT_CTLLO(chan)
 				| DWC_CTLL_DST_WIDTH(reg_width)
@@ -811,7 +811,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
 			len = sg_dma_len(sg);
 
 			mem_width = min_t(unsigned int,
-					  data_width, dwc_fast_fls(mem | len));
+					  data_width, dwc_fast_ffs(mem | len));
 
 slave_sg_todev_fill_desc:
 			desc = dwc_desc_get(dwc);
@@ -848,7 +848,7 @@ slave_sg_todev_fill_desc:
 		}
 		break;
 	case DMA_DEV_TO_MEM:
-		reg_width = __fls(sconfig->src_addr_width);
+		reg_width = __ffs(sconfig->src_addr_width);
 		reg = sconfig->src_addr;
 		ctllo = (DWC_DEFAULT_CTLLO(chan)
 				| DWC_CTLL_SRC_WIDTH(reg_width)
@@ -868,7 +868,7 @@ slave_sg_todev_fill_desc:
 			len = sg_dma_len(sg);
 
 			mem_width = min_t(unsigned int,
-					  data_width, dwc_fast_fls(mem | len));
+					  data_width, dwc_fast_ffs(mem | len));
 
 slave_sg_fromdev_fill_desc:
 			desc = dwc_desc_get(dwc);
-- 
1.9.1

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#1302055 — [PATCH 4.2.y-ckt 119/211] wm831x_power: Use IRQF_ONESHOT to request threaded IRQs

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Valentin Rothberg <valentinrothberg@gmail.com>

commit 90adf98d9530054b8e665ba5a928de4307231d84 upstream.

Since commit 1c6c69525b40 ("genirq: Reject bogus threaded irq requests")
threaded IRQs without a primary handler need to be requested with
IRQF_ONESHOT, otherwise the request will fail.

scripts/coccinelle/misc/irqf_oneshot.cocci detected this issue.

Fixes: b5874f33bbaf ("wm831x_power: Use genirq")
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/power/wm831x_power.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/power/wm831x_power.c b/drivers/power/wm831x_power.c
index db11ae6..25f8b34 100644
--- a/drivers/power/wm831x_power.c
+++ b/drivers/power/wm831x_power.c
@@ -572,7 +572,7 @@ static int wm831x_power_probe(struct platform_device *pdev)
 
 	irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO"));
 	ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq,
-				   IRQF_TRIGGER_RISING, "System power low",
+				   IRQF_TRIGGER_RISING | IRQF_ONESHOT, "System power low",
 				   power);
 	if (ret != 0) {
 		dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
@@ -582,7 +582,7 @@ static int wm831x_power_probe(struct platform_device *pdev)
 
 	irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC"));
 	ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq,
-				   IRQF_TRIGGER_RISING, "Power source",
+				   IRQF_TRIGGER_RISING | IRQF_ONESHOT, "Power source",
 				   power);
 	if (ret != 0) {
 		dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
@@ -595,7 +595,7 @@ static int wm831x_power_probe(struct platform_device *pdev)
 				 platform_get_irq_byname(pdev,
 							 wm831x_bat_irqs[i]));
 		ret = request_threaded_irq(irq, NULL, wm831x_bat_irq,
-					   IRQF_TRIGGER_RISING,
+					   IRQF_TRIGGER_RISING | IRQF_ONESHOT,
 					   wm831x_bat_irqs[i],
 					   power);
 		if (ret != 0) {
-- 
1.9.1

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#1302056 — [PATCH 4.2.y-ckt 097/211] proc: actually make proc_fd_permission() thread-friendly

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Oleg Nesterov <oleg@redhat.com>

commit 54708d2858e79a2bdda10bf8a20c80eb96c20613 upstream.

The commit 96d0df79f264 ("proc: make proc_fd_permission() thread-friendly")
fixed the access to /proc/self/fd from sub-threads, but introduced another
problem: a sub-thread can't access /proc/<tid>/fd/ or /proc/thread-self/fd
if generic_permission() fails.

Change proc_fd_permission() to check same_thread_group(pid_task(), current).

Fixes: 96d0df79f264 ("proc: make proc_fd_permission() thread-friendly")
Reported-by: "Jin, Yihua" <yihua.jin@intel.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 fs/proc/fd.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index 6e5fcd0..3c2a915 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -291,11 +291,19 @@ static struct dentry *proc_lookupfd(struct inode *dir, struct dentry *dentry,
  */
 int proc_fd_permission(struct inode *inode, int mask)
 {
-	int rv = generic_permission(inode, mask);
+	struct task_struct *p;
+	int rv;
+
+	rv = generic_permission(inode, mask);
 	if (rv == 0)
-		return 0;
-	if (task_tgid(current) == proc_pid(inode))
+		return rv;
+
+	rcu_read_lock();
+	p = pid_task(proc_pid(inode), PIDTYPE_PID);
+	if (p && same_thread_group(p, current))
 		rv = 0;
+	rcu_read_unlock();
+
 	return rv;
 }
 
-- 
1.9.1

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#1302057 — [PATCH 4.2.y-ckt 111/211] binfmt_elf: Don't clobber passed executable's file header

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Maciej W. Rozycki" <macro@imgtec.com>

commit b582ef5c53040c5feef4c96a8f9585b6831e2441 upstream.

Do not clobber the buffer space passed from `search_binary_handler' and
originally preloaded by `prepare_binprm' with the executable's file
header by overwriting it with its interpreter's file header.  Instead
keep the buffer space intact and directly use the data structure locally
allocated for the interpreter's file header, fixing a bug introduced in
2.1.14 with loadable module support (linux-mips.org commit beb11695
[Import of Linux/MIPS 2.1.14], predating kernel.org repo's history).
Adjust the amount of data read from the interpreter's file accordingly.

This was not an issue before loadable module support, because back then
`load_elf_binary' was executed only once for a given ELF executable,
whether the function succeeded or failed.

With loadable module support supported and enabled, upon a failure of
`load_elf_binary' -- which may for example be caused by architecture
code rejecting an executable due to a missing hardware feature requested
in the file header -- a module load is attempted and then the function
reexecuted by `search_binary_handler'.  With the executable's file
header replaced with its interpreter's file header the executable can
then be erroneously accepted in this subsequent attempt.

Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 fs/binfmt_elf.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 6b65996..e6572a6 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -759,16 +759,16 @@ static int load_elf_binary(struct linux_binprm *bprm)
 			 */
 			would_dump(bprm, interpreter);
 
-			retval = kernel_read(interpreter, 0, bprm->buf,
-					     BINPRM_BUF_SIZE);
-			if (retval != BINPRM_BUF_SIZE) {
+			/* Get the exec headers */
+			retval = kernel_read(interpreter, 0,
+					     (void *)&loc->interp_elf_ex,
+					     sizeof(loc->interp_elf_ex));
+			if (retval != sizeof(loc->interp_elf_ex)) {
 				if (retval >= 0)
 					retval = -EIO;
 				goto out_free_dentry;
 			}
 
-			/* Get the exec headers */
-			loc->interp_elf_ex = *((struct elfhdr *)bprm->buf);
 			break;
 		}
 		elf_ppnt++;
-- 
1.9.1

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#1302059 — [PATCH 4.2.y-ckt 110/211] FS-Cache: Handle a write to the page immediately beyond the EOF marker

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Howells <dhowells@redhat.com>

commit 102f4d900c9c8f5ed89ae4746d493fe3ebd7ba64 upstream.

Handle a write being requested to the page immediately beyond the EOF
marker on a cache object.  Currently this gets an assertion failure in
CacheFiles because the EOF marker is used there to encode information about
a partial page at the EOF - which could lead to an unknown blank spot in
the file if we extend the file over it.

The problem is actually in fscache where we check the index of the page
being written against store_limit.  store_limit is set to the number of
pages that we're allowed to store by fscache_set_store_limit() - which
means it's one more than the index of the last page we're allowed to store.
The problem is that we permit writing to a page with an index _equal_ to
the store limit - when we should reject that case.

Whilst we're at it, change the triggered assertion in CacheFiles to just
return -ENOBUFS instead.

The assertion failure looks something like this:

CacheFiles: Assertion failed
1000 < 7b1 is false
------------[ cut here ]------------
kernel BUG at fs/cachefiles/rdwr.c:962!
...
RIP: 0010:[<ffffffffa02c9e83>]  [<ffffffffa02c9e83>] cachefiles_write_page+0x273/0x2d0 [cachefiles]

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 fs/cachefiles/rdwr.c | 67 +++++++++++++++++++++++++++++-----------------------
 fs/fscache/page.c    |  2 +-
 2 files changed, 38 insertions(+), 31 deletions(-)

diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 3cbb0e8..e62faae 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -905,6 +905,15 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
 	cache = container_of(object->fscache.cache,
 			     struct cachefiles_cache, cache);
 
+	pos = (loff_t)page->index << PAGE_SHIFT;
+
+	/* We mustn't write more data than we have, so we have to beware of a
+	 * partial page at EOF.
+	 */
+	eof = object->fscache.store_limit_l;
+	if (pos >= eof)
+		goto error;
+
 	/* write the page to the backing filesystem and let it store it in its
 	 * own time */
 	path.mnt = cache->mnt;
@@ -912,40 +921,38 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
 	file = dentry_open(&path, O_RDWR | O_LARGEFILE, cache->cache_cred);
 	if (IS_ERR(file)) {
 		ret = PTR_ERR(file);
-	} else {
-		pos = (loff_t) page->index << PAGE_SHIFT;
-
-		/* we mustn't write more data than we have, so we have
-		 * to beware of a partial page at EOF */
-		eof = object->fscache.store_limit_l;
-		len = PAGE_SIZE;
-		if (eof & ~PAGE_MASK) {
-			ASSERTCMP(pos, <, eof);
-			if (eof - pos < PAGE_SIZE) {
-				_debug("cut short %llx to %llx",
-				       pos, eof);
-				len = eof - pos;
-				ASSERTCMP(pos + len, ==, eof);
-			}
-		}
-
-		data = kmap(page);
-		ret = __kernel_write(file, data, len, &pos);
-		kunmap(page);
-		if (ret != len)
-			ret = -EIO;
-		fput(file);
+		goto error_2;
 	}
 
-	if (ret < 0) {
-		if (ret == -EIO)
-			cachefiles_io_error_obj(
-				object, "Write page to backing file failed");
-		ret = -ENOBUFS;
+	len = PAGE_SIZE;
+	if (eof & ~PAGE_MASK) {
+		if (eof - pos < PAGE_SIZE) {
+			_debug("cut short %llx to %llx",
+			       pos, eof);
+			len = eof - pos;
+			ASSERTCMP(pos + len, ==, eof);
+		}
 	}
 
-	_leave(" = %d", ret);
-	return ret;
+	data = kmap(page);
+	ret = __kernel_write(file, data, len, &pos);
+	kunmap(page);
+	fput(file);
+	if (ret != len)
+		goto error_eio;
+
+	_leave(" = 0");
+	return 0;
+
+error_eio:
+	ret = -EIO;
+error_2:
+	if (ret == -EIO)
+		cachefiles_io_error_obj(object,
+					"Write page to backing file failed");
+error:
+	_leave(" = -ENOBUFS [%d]", ret);
+	return -ENOBUFS;
 }
 
 /*
diff --git a/fs/fscache/page.c b/fs/fscache/page.c
index 483bbc6..ca916af 100644
--- a/fs/fscache/page.c
+++ b/fs/fscache/page.c
@@ -816,7 +816,7 @@ static void fscache_write_op(struct fscache_operation *_op)
 		goto superseded;
 	page = results[0];
 	_debug("gang %d [%lx]", n, page->index);
-	if (page->index > op->store_limit) {
+	if (page->index >= op->store_limit) {
 		fscache_stat(&fscache_n_store_pages_over_limit);
 		goto superseded;
 	}
-- 
1.9.1

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#1302060 — [PATCH 4.2.y-ckt 109/211] FS-Cache: Don't override netfs's primary_index if registering failed

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kinglong Mee <kinglongmee@gmail.com>

commit b130ed5998e62879a66bad08931a2b5e832da95c upstream.

Only override netfs->primary_index when registering success.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 fs/fscache/netfs.c | 35 +++++++++++++++++------------------
 1 file changed, 17 insertions(+), 18 deletions(-)

diff --git a/fs/fscache/netfs.c b/fs/fscache/netfs.c
index 458cc96..9b28649 100644
--- a/fs/fscache/netfs.c
+++ b/fs/fscache/netfs.c
@@ -22,6 +22,7 @@ static LIST_HEAD(fscache_netfs_list);
 int __fscache_register_netfs(struct fscache_netfs *netfs)
 {
 	struct fscache_netfs *ptr;
+	struct fscache_cookie *cookie;
 	int ret;
 
 	_enter("{%s}", netfs->name);
@@ -29,26 +30,25 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
 	INIT_LIST_HEAD(&netfs->link);
 
 	/* allocate a cookie for the primary index */
-	netfs->primary_index =
-		kmem_cache_zalloc(fscache_cookie_jar, GFP_KERNEL);
+	cookie = kmem_cache_zalloc(fscache_cookie_jar, GFP_KERNEL);
 
-	if (!netfs->primary_index) {
+	if (!cookie) {
 		_leave(" = -ENOMEM");
 		return -ENOMEM;
 	}
 
 	/* initialise the primary index cookie */
-	atomic_set(&netfs->primary_index->usage, 1);
-	atomic_set(&netfs->primary_index->n_children, 0);
-	atomic_set(&netfs->primary_index->n_active, 1);
+	atomic_set(&cookie->usage, 1);
+	atomic_set(&cookie->n_children, 0);
+	atomic_set(&cookie->n_active, 1);
 
-	netfs->primary_index->def		= &fscache_fsdef_netfs_def;
-	netfs->primary_index->parent		= &fscache_fsdef_index;
-	netfs->primary_index->netfs_data	= netfs;
-	netfs->primary_index->flags		= 1 << FSCACHE_COOKIE_ENABLED;
+	cookie->def		= &fscache_fsdef_netfs_def;
+	cookie->parent		= &fscache_fsdef_index;
+	cookie->netfs_data	= netfs;
+	cookie->flags		= 1 << FSCACHE_COOKIE_ENABLED;
 
-	spin_lock_init(&netfs->primary_index->lock);
-	INIT_HLIST_HEAD(&netfs->primary_index->backing_objects);
+	spin_lock_init(&cookie->lock);
+	INIT_HLIST_HEAD(&cookie->backing_objects);
 
 	/* check the netfs type is not already present */
 	down_write(&fscache_addremove_sem);
@@ -59,9 +59,10 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
 			goto already_registered;
 	}
 
-	atomic_inc(&netfs->primary_index->parent->usage);
-	atomic_inc(&netfs->primary_index->parent->n_children);
+	atomic_inc(&cookie->parent->usage);
+	atomic_inc(&cookie->parent->n_children);
 
+	netfs->primary_index = cookie;
 	list_add(&netfs->link, &fscache_netfs_list);
 	ret = 0;
 
@@ -70,10 +71,8 @@ int __fscache_register_netfs(struct fscache_netfs *netfs)
 already_registered:
 	up_write(&fscache_addremove_sem);
 
-	if (ret < 0) {
-		kmem_cache_free(fscache_cookie_jar, netfs->primary_index);
-		netfs->primary_index = NULL;
-	}
+	if (ret < 0)
+		kmem_cache_free(fscache_cookie_jar, cookie);
 
 	_leave(" = %d", ret);
 	return ret;
-- 
1.9.1

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#1302061 — [PATCH 4.2.y-ckt 091/211] mm: slab: only move management objects off-slab for sizes larger than KMALLOC_MIN_SIZE

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Catalin Marinas <catalin.marinas@arm.com>

commit d4322d88f5fdf92729dd40f923013414fbb2184d upstream.

On systems with a KMALLOC_MIN_SIZE of 128 (arm64, some mips and powerpc
configurations defining ARCH_DMA_MINALIGN to 128), the first
kmalloc_caches[] entry to be initialised after slab_early_init = 0 is
"kmalloc-128" with index 7.  Depending on the debug kernel configuration,
sizeof(struct kmem_cache) can be larger than 128 resulting in an
INDEX_NODE of 8.

Commit 8fc9cf420b36 ("slab: make more slab management structure off the
slab") enables off-slab management objects for sizes starting with
PAGE_SIZE >> 5 (128 bytes for a 4KB page configuration) and the creation
of the "kmalloc-128" cache would try to place the management objects
off-slab.  However, since KMALLOC_MIN_SIZE is already 128 and
freelist_size == 32 in __kmem_cache_create(), kmalloc_slab(freelist_size)
returns NULL (kmalloc_caches[7] not populated yet).  This triggers the
following bug on arm64:

  kernel BUG at /work/Linux/linux-2.6-aarch64/mm/slab.c:2283!
  Internal error: Oops - BUG: 0 [#1] SMP
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper Not tainted 4.3.0-rc4+ #540
  Hardware name: Juno (DT)
  PC is at __kmem_cache_create+0x21c/0x280
  LR is at __kmem_cache_create+0x210/0x280
  [...]
  Call trace:
    __kmem_cache_create+0x21c/0x280
    create_boot_cache+0x48/0x80
    create_kmalloc_cache+0x50/0x88
    create_kmalloc_caches+0x4c/0xf4
    kmem_cache_init+0x100/0x118
    start_kernel+0x214/0x33c

This patch introduces an OFF_SLAB_MIN_SIZE definition to avoid off-slab
management objects for sizes equal to or smaller than KMALLOC_MIN_SIZE.

Fixes: 8fc9cf420b36 ("slab: make more slab management structure off the slab")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 mm/slab.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index ae36028..6cf73a6 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -282,6 +282,7 @@ static void kmem_cache_node_init(struct kmem_cache_node *parent)
 
 #define CFLGS_OFF_SLAB		(0x80000000UL)
 #define	OFF_SLAB(x)	((x)->flags & CFLGS_OFF_SLAB)
+#define OFF_SLAB_MIN_SIZE (max_t(size_t, PAGE_SIZE >> 5, KMALLOC_MIN_SIZE + 1))
 
 #define BATCHREFILL_LIMIT	16
 /*
@@ -2212,7 +2213,7 @@ __kmem_cache_create (struct kmem_cache *cachep, unsigned long flags)
 	 * it too early on. Always use on-slab management when
 	 * SLAB_NOLEAKTRACE to avoid recursive calls into kmemleak)
 	 */
-	if ((size >= (PAGE_SIZE >> 5)) && !slab_early_init &&
+	if (size >= OFF_SLAB_MIN_SIZE && !slab_early_init &&
 	    !(flags & SLAB_NOLEAKTRACE))
 		/*
 		 * Size is large, assume best to place the slab management obj
@@ -2276,7 +2277,7 @@ __kmem_cache_create (struct kmem_cache *cachep, unsigned long flags)
 		/*
 		 * This is a possibility for one of the kmalloc_{dma,}_caches.
 		 * But since we go off slab only for object size greater than
-		 * PAGE_SIZE/8, and kmalloc_{dma,}_caches get created
+		 * OFF_SLAB_MIN_SIZE, and kmalloc_{dma,}_caches get created
 		 * in ascending order,this should not happen at all.
 		 * But leave a BUG_ON for some lucky dude.
 		 */
-- 
1.9.1

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#1302062 — [PATCH 4.2.y-ckt 105/211] storvsc: Don't set the SRB_FLAGS_QUEUE_ACTION_ENABLE flag

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "K. Y. Srinivasan" <kys@microsoft.com>

commit 8cf308e1225f5f93575f03cc4dbef24516fa81c9 upstream.

Don't set the SRB_FLAGS_QUEUE_ACTION_ENABLE flag since we are not specifying
tags.  Without this, the qlogic driver doesn't work properly with storvsc.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/scsi/storvsc_drv.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 3c6584f..c2610de 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1585,8 +1585,7 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
 	vm_srb->win8_extension.time_out_value = 60;
 
 	vm_srb->win8_extension.srb_flags |=
-		(SRB_FLAGS_QUEUE_ACTION_ENABLE |
-		SRB_FLAGS_DISABLE_SYNCH_TRANSFER);
+		SRB_FLAGS_DISABLE_SYNCH_TRANSFER;
 
 	/* Build the SRB */
 	switch (scmnd->sc_data_direction) {
-- 
1.9.1

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#1302063 — [PATCH 4.2.y-ckt 095/211] arm64: bpf: fix mod-by-zero case

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zi Shen Lim <zlim.lnx@gmail.com>

commit 14e589ff4aa3f28a5424e92b6495ecb8950080f7 upstream.

Turns out in the case of modulo by zero in a BPF program:
	A = A % X;  (X == 0)
the expected behavior is to terminate with return value 0.

The bug in JIT is exposed by a new test case [1].

[1] https://lkml.org/lkml/2015/11/4/499

Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Reported-by: Yang Shi <yang.shi@linaro.org>
Reported-by: Xi Wang <xi.wang@gmail.com>
CC: Alexei Starovoitov <ast@plumgrid.com>
Fixes: e54bcde3d69d ("arm64: eBPF JIT compiler")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 arch/arm64/net/bpf_jit_comp.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index 9ae6f23..6217f80 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -269,6 +269,8 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
 		break;
 	case BPF_ALU | BPF_DIV | BPF_X:
 	case BPF_ALU64 | BPF_DIV | BPF_X:
+	case BPF_ALU | BPF_MOD | BPF_X:
+	case BPF_ALU64 | BPF_MOD | BPF_X:
 	{
 		const u8 r0 = bpf2a64[BPF_REG_0];
 
@@ -281,16 +283,19 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
 		check_imm26(jmp_offset);
 		emit(A64_B(jmp_offset), ctx);
 		/* else */
-		emit(A64_UDIV(is64, dst, dst, src), ctx);
+		switch (BPF_OP(code)) {
+		case BPF_DIV:
+			emit(A64_UDIV(is64, dst, dst, src), ctx);
+			break;
+		case BPF_MOD:
+			ctx->tmp_used = 1;
+			emit(A64_UDIV(is64, tmp, dst, src), ctx);
+			emit(A64_MUL(is64, tmp, tmp, src), ctx);
+			emit(A64_SUB(is64, dst, dst, tmp), ctx);
+			break;
+		}
 		break;
 	}
-	case BPF_ALU | BPF_MOD | BPF_X:
-	case BPF_ALU64 | BPF_MOD | BPF_X:
-		ctx->tmp_used = 1;
-		emit(A64_UDIV(is64, tmp, dst, src), ctx);
-		emit(A64_MUL(is64, tmp, tmp, src), ctx);
-		emit(A64_SUB(is64, dst, dst, tmp), ctx);
-		break;
 	case BPF_ALU | BPF_LSH | BPF_X:
 	case BPF_ALU64 | BPF_LSH | BPF_X:
 		emit(A64_LSLV(is64, dst, dst, src), ctx);
-- 
1.9.1

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#1302064 — [PATCH 4.2.y-ckt 057/211] ACPI: Using correct irq when waiting for events

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Chen Yu <yu.c.chen@intel.com>

commit efb1cf7d28b8aeacec53e9ba8f3f2809c5cb9686 upstream.

When the system is waiting for GPE/fixed event handler to finish,
it uses acpi_gbl_FADT.sci_interrupt directly as the IRQ number.
However, the remapped IRQ returned by acpi_gsi_to_irq() should be
passed to synchronize_hardirq() instead of it.

Acked-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/acpi/osl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 9323096..9d5436f 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1213,8 +1213,8 @@ void acpi_os_wait_events_complete(void)
 	 * Make sure the GPE handler or the fixed event handler is not used
 	 * on another CPU after removal.
 	 */
-	if (acpi_irq_handler)
-		synchronize_hardirq(acpi_gbl_FADT.sci_interrupt);
+	if (acpi_sci_irq_valid())
+		synchronize_hardirq(acpi_sci_irq);
 	flush_workqueue(kacpid_wq);
 	flush_workqueue(kacpi_notify_wq);
 }
-- 
1.9.1

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#1302065 — [PATCH 4.2.y-ckt 088/211] drm: Use userspace compatible type in fourcc_mod_code macro

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

commit 6172180c6b37ea164bf8a9bad70bb348d0a16563 upstream.

__u64 should be used instead of u64.

Feature originally added in:

commit e3eb3250d84ef97b766312345774367b6a310db8
Author: Rob Clark <robdclark@gmail.com>
Date:   Thu Feb 5 14:41:52 2015 +0000

    drm: add support for tiled/compressed/etc modifier in addfb2

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Daniel Stone <daniels@collabora.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: dri-devel@lists.freedesktop.org
Fixes: e3eb3250d84e ("drm: add support for tiled/compressed/etc modifier in addfb2")
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1442999431-28568-1-git-send-email-tvrtko.ursulin@linux.intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 include/uapi/drm/drm_fourcc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 2f295cd..904c798 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -151,7 +151,7 @@
 /* add more to the end as needed */
 
 #define fourcc_mod_code(vendor, val) \
-	((((u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) | (val & 0x00ffffffffffffffULL))
+	((((__u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) | (val & 0x00ffffffffffffffULL))
 
 /*
  * Format Modifier tokens:
-- 
1.9.1

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#1302066 — [PATCH 4.2.y-ckt 112/211] fs/pipe.c: return error code rather than 0 in pipe_write()

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Biggers <ebiggers3@gmail.com>

commit 6ae08069939f17422835448acae76bda8d96b16a upstream.

pipe_write() would return 0 if it failed to merge the beginning of the
data to write with the last, partially filled pipe buffer.  It should
return an error code instead.  Userspace programs could be confused by
write() returning 0 when called with a nonzero 'count'.

The EFAULT error case was a regression from f0d1bec9d5 ("new helper:
copy_page_from_iter()"), while the ops->confirm() error case was a much
older bug.

Test program:

	#include <assert.h>
	#include <errno.h>
	#include <unistd.h>

	int main(void)
	{
		int fd[2];
		char data[1] = {0};

		assert(0 == pipe(fd));
		assert(1 == write(fd[1], data, 1));

		/* prior to this patch, write() returned 0 here  */
		assert(-1 == write(fd[1], NULL, 1));
		assert(errno == EFAULT);
	}

Signed-off-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 fs/pipe.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/pipe.c b/fs/pipe.c
index 8865f79..14788dd 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -366,18 +366,17 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from)
 		int offset = buf->offset + buf->len;
 
 		if (ops->can_merge && offset + chars <= PAGE_SIZE) {
-			int error = ops->confirm(pipe, buf);
-			if (error)
+			ret = ops->confirm(pipe, buf);
+			if (ret)
 				goto out;
 
 			ret = copy_page_from_iter(buf->page, offset, chars, from);
 			if (unlikely(ret < chars)) {
-				error = -EFAULT;
+				ret = -EFAULT;
 				goto out;
 			}
 			do_wakeup = 1;
-			buf->len += chars;
-			ret = chars;
+			buf->len += ret;
 			if (!iov_iter_count(from))
 				goto out;
 		}
-- 
1.9.1

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#1302067 — [PATCH 4.2.y-ckt 101/211] parisc: Fixes and cleanups in kernel uapi header files

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Helge Deller <deller@gmx.de>

commit d0cf62fb63f760e98244d31396b3b58f3a1e326b upstream.

This patch fixes some bugs and partly cleans up the parisc uapi header
files to what glibc defined:
- compat_semid64_ds was wrong and did not take the endianess into
  account
- ipc64_perm exported userspace types which broke building userspace
  packages on debian (e.g. trinity)
- ipc64_perm needs to use a 32bit mode_t on 64bit kernel
- msqid64_ds and semid64_ds needs unsigned longs for various struct members
- shmid64_ds exported size_t instead of __kernel_size_t

And finally add some compile-time checks for the sizes of those structs
to avoid future breakage.

Runtime-tested with the Linux Test Project (LTP) testsuite.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 arch/parisc/include/asm/compat.h           |  4 ++--
 arch/parisc/include/uapi/asm/ipcbuf.h      | 19 ++++++++++++-------
 arch/parisc/include/uapi/asm/msgbuf.h      | 10 +++++-----
 arch/parisc/include/uapi/asm/posix_types.h |  2 ++
 arch/parisc/include/uapi/asm/sembuf.h      |  6 +++---
 arch/parisc/include/uapi/asm/shmbuf.h      |  8 ++++----
 arch/parisc/mm/init.c                      | 16 ++++++++++++++++
 7 files changed, 44 insertions(+), 21 deletions(-)

diff --git a/arch/parisc/include/asm/compat.h b/arch/parisc/include/asm/compat.h
index 94710cf..0448a2c 100644
--- a/arch/parisc/include/asm/compat.h
+++ b/arch/parisc/include/asm/compat.h
@@ -206,10 +206,10 @@ struct compat_ipc64_perm {
 
 struct compat_semid64_ds {
 	struct compat_ipc64_perm sem_perm;
-	compat_time_t sem_otime;
 	unsigned int __unused1;
-	compat_time_t sem_ctime;
+	compat_time_t sem_otime;
 	unsigned int __unused2;
+	compat_time_t sem_ctime;
 	compat_ulong_t sem_nsems;
 	compat_ulong_t __unused3;
 	compat_ulong_t __unused4;
diff --git a/arch/parisc/include/uapi/asm/ipcbuf.h b/arch/parisc/include/uapi/asm/ipcbuf.h
index bd956c4..790c411 100644
--- a/arch/parisc/include/uapi/asm/ipcbuf.h
+++ b/arch/parisc/include/uapi/asm/ipcbuf.h
@@ -1,6 +1,9 @@
 #ifndef __PARISC_IPCBUF_H__
 #define __PARISC_IPCBUF_H__
 
+#include <asm/bitsperlong.h>
+#include <linux/posix_types.h>
+
 /*
  * The ipc64_perm structure for PA-RISC is almost identical to
  * kern_ipc_perm as we have always had 32-bit UIDs and GIDs in the kernel.
@@ -10,16 +13,18 @@
 
 struct ipc64_perm
 {
-	key_t           key;
-	uid_t           uid;
-	gid_t           gid;
-	uid_t           cuid;
-	gid_t           cgid;
+	__kernel_key_t		key;
+	__kernel_uid_t		uid;
+	__kernel_gid_t		gid;
+	__kernel_uid_t		cuid;
+	__kernel_gid_t		cgid;
+#if __BITS_PER_LONG != 64
 	unsigned short int	__pad1;
-	mode_t          mode;
+#endif
+	__kernel_mode_t		mode;
 	unsigned short int	__pad2;
 	unsigned short int	seq;
-	unsigned int	__pad3;
+	unsigned int		__pad3;
 	unsigned long long int __unused1;
 	unsigned long long int __unused2;
 };
diff --git a/arch/parisc/include/uapi/asm/msgbuf.h b/arch/parisc/include/uapi/asm/msgbuf.h
index 3421389..2e83ac7 100644
--- a/arch/parisc/include/uapi/asm/msgbuf.h
+++ b/arch/parisc/include/uapi/asm/msgbuf.h
@@ -27,13 +27,13 @@ struct msqid64_ds {
 	unsigned int   __pad3;
 #endif
 	__kernel_time_t msg_ctime;	/* last change time */
-	unsigned int  msg_cbytes;	/* current number of bytes on queue */
-	unsigned int  msg_qnum;	/* number of messages in queue */
-	unsigned int  msg_qbytes;	/* max number of bytes on queue */
+	unsigned long msg_cbytes;	/* current number of bytes on queue */
+	unsigned long msg_qnum;		/* number of messages in queue */
+	unsigned long msg_qbytes;	/* max number of bytes on queue */
 	__kernel_pid_t msg_lspid;	/* pid of last msgsnd */
 	__kernel_pid_t msg_lrpid;	/* last receive pid */
-	unsigned int  __unused1;
-	unsigned int  __unused2;
+	unsigned long __unused1;
+	unsigned long __unused2;
 };
 
 #endif /* _PARISC_MSGBUF_H */
diff --git a/arch/parisc/include/uapi/asm/posix_types.h b/arch/parisc/include/uapi/asm/posix_types.h
index b934425..f3b5f70 100644
--- a/arch/parisc/include/uapi/asm/posix_types.h
+++ b/arch/parisc/include/uapi/asm/posix_types.h
@@ -7,8 +7,10 @@
  * assume GCC is being used.
  */
 
+#ifndef __LP64__
 typedef unsigned short		__kernel_mode_t;
 #define __kernel_mode_t __kernel_mode_t
+#endif
 
 typedef unsigned short		__kernel_ipc_pid_t;
 #define __kernel_ipc_pid_t __kernel_ipc_pid_t
diff --git a/arch/parisc/include/uapi/asm/sembuf.h b/arch/parisc/include/uapi/asm/sembuf.h
index f01d89e..c20971b 100644
--- a/arch/parisc/include/uapi/asm/sembuf.h
+++ b/arch/parisc/include/uapi/asm/sembuf.h
@@ -23,9 +23,9 @@ struct semid64_ds {
 	unsigned int	__pad2;
 #endif
 	__kernel_time_t	sem_ctime;		/* last change time */
-	unsigned int	sem_nsems;		/* no. of semaphores in array */
-	unsigned int	__unused1;
-	unsigned int	__unused2;
+	unsigned long 	sem_nsems;		/* no. of semaphores in array */
+	unsigned long	__unused1;
+	unsigned long	__unused2;
 };
 
 #endif /* _PARISC_SEMBUF_H */
diff --git a/arch/parisc/include/uapi/asm/shmbuf.h b/arch/parisc/include/uapi/asm/shmbuf.h
index 8496c38..750e13e 100644
--- a/arch/parisc/include/uapi/asm/shmbuf.h
+++ b/arch/parisc/include/uapi/asm/shmbuf.h
@@ -30,12 +30,12 @@ struct shmid64_ds {
 #if __BITS_PER_LONG != 64
 	unsigned int		__pad4;
 #endif
-	size_t			shm_segsz;	/* size of segment (bytes) */
+	__kernel_size_t		shm_segsz;	/* size of segment (bytes) */
 	__kernel_pid_t		shm_cpid;	/* pid of creator */
 	__kernel_pid_t		shm_lpid;	/* pid of last operator */
-	unsigned int		shm_nattch;	/* no. of current attaches */
-	unsigned int		__unused1;
-	unsigned int		__unused2;
+	unsigned long		shm_nattch;	/* no. of current attaches */
+	unsigned long		__unused1;
+	unsigned long		__unused2;
 };
 
 struct shminfo64 {
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index c229427..c5fec48 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -23,6 +23,7 @@
 #include <linux/unistd.h>
 #include <linux/nodemask.h>	/* for node_online_map */
 #include <linux/pagemap.h>	/* for release_pages and page_cache_release */
+#include <linux/compat.h>
 
 #include <asm/pgalloc.h>
 #include <asm/pgtable.h>
@@ -30,6 +31,7 @@
 #include <asm/pdc_chassis.h>
 #include <asm/mmzone.h>
 #include <asm/sections.h>
+#include <asm/msgbuf.h>
 
 extern int  data_start;
 extern void parisc_kernel_start(void);	/* Kernel entry point in head.S */
@@ -590,6 +592,20 @@ unsigned long pcxl_dma_start __read_mostly;
 
 void __init mem_init(void)
 {
+	/* Do sanity checks on IPC (compat) structures */
+	BUILD_BUG_ON(sizeof(struct ipc64_perm) != 48);
+#ifndef CONFIG_64BIT
+	BUILD_BUG_ON(sizeof(struct semid64_ds) != 80);
+	BUILD_BUG_ON(sizeof(struct msqid64_ds) != 104);
+	BUILD_BUG_ON(sizeof(struct shmid64_ds) != 104);
+#endif
+#ifdef CONFIG_COMPAT
+	BUILD_BUG_ON(sizeof(struct compat_ipc64_perm) != sizeof(struct ipc64_perm));
+	BUILD_BUG_ON(sizeof(struct compat_semid64_ds) != 80);
+	BUILD_BUG_ON(sizeof(struct compat_msqid64_ds) != 104);
+	BUILD_BUG_ON(sizeof(struct compat_shmid64_ds) != 104);
+#endif
+
 	/* Do sanity checks on page table constants */
 	BUILD_BUG_ON(PTE_ENTRY_SIZE != sizeof(pte_t));
 	BUILD_BUG_ON(PMD_ENTRY_SIZE != sizeof(pmd_t));
-- 
1.9.1

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#1302068 — [PATCH 4.2.y-ckt 090/211] toshiba_acpi: Initialize hotkey_event_type variable

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Azael Avalos <coproscefalo@gmail.com>

commit d2f20619942fe4618160a7fa3dbdcbac335cff59 upstream.

Commit 53147b6cabee5e8d1997b5682fcc0c3b72ddf9c2 ("toshiba_acpi: Fix
hotkeys registration on some toshiba models") fixed an issue on some
laptops regarding hotkeys registration, however, if failed to address
the initialization of the hotkey_event_type variable, and thus, it can
lead to potential unwanted effects as the variable is being checked.

This patch initializes such variable to avoid such unwanted effects.

Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/platform/x86/toshiba_acpi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 6f4f310..550e0ce 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -2638,6 +2638,7 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
 	ret = toshiba_function_keys_get(dev, &special_functions);
 	dev->kbd_function_keys_supported = !ret;
 
+	dev->hotkey_event_type = 0;
 	if (toshiba_acpi_setup_keyboard(dev))
 		pr_info("Unable to activate hotkeys\n");
 
-- 
1.9.1

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#1302069 — [PATCH 4.2.y-ckt 063/211] drm/amdgpu: add some additional CZ revisions

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

commit b8b339ea3b76392b1be7445f5ce57958fa6539f3 upstream.

Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 6c0bfc3..ff34c95 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -2012,6 +2012,8 @@ static void gfx_v8_0_gpu_init(struct amdgpu_device *adev)
 		case 0x84:
 		case 0xc8:
 		case 0xcc:
+		case 0xe1:
+		case 0xe3:
 			/* B10 */
 			adev->gfx.config.max_cu_per_sh = 8;
 			break;
@@ -2020,18 +2022,23 @@ static void gfx_v8_0_gpu_init(struct amdgpu_device *adev)
 		case 0x85:
 		case 0xc9:
 		case 0xcd:
+		case 0xe2:
+		case 0xe4:
 			/* B8 */
 			adev->gfx.config.max_cu_per_sh = 6;
 			break;
 		case 0xc6:
 		case 0xca:
 		case 0xce:
+		case 0x88:
 			/* B6 */
 			adev->gfx.config.max_cu_per_sh = 6;
 			break;
 		case 0xc7:
 		case 0x87:
 		case 0xcb:
+		case 0xe5:
+		case 0x89:
 		default:
 			/* B4 */
 			adev->gfx.config.max_cu_per_sh = 4;
-- 
1.9.1

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#1302070 — [PATCH 4.2.y-ckt 094/211] arm64: bpf: fix div-by-zero case

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zi Shen Lim <zlim.lnx@gmail.com>

commit 251599e1d6906621f49218d7b474ddd159e58f3b upstream.

In the case of division by zero in a BPF program:
	A = A / X;  (X == 0)
the expected behavior is to terminate with return value 0.

This is confirmed by the test case introduced in commit 86bf1721b226
("test_bpf: add tests checking that JIT/interpreter sets A and X to 0.").

Reported-by: Yang Shi <yang.shi@linaro.org>
Tested-by: Yang Shi <yang.shi@linaro.org>
CC: Xi Wang <xi.wang@gmail.com>
CC: Alexei Starovoitov <ast@plumgrid.com>
CC: linux-arm-kernel@lists.infradead.org
CC: linux-kernel@vger.kernel.org
Fixes: e54bcde3d69d ("arm64: eBPF JIT compiler")
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 arch/arm64/net/bpf_jit.h      |  3 ++-
 arch/arm64/net/bpf_jit_comp.c | 37 +++++++++++++++++++++++++------------
 2 files changed, 27 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/net/bpf_jit.h b/arch/arm64/net/bpf_jit.h
index 98a26ce..aee5637 100644
--- a/arch/arm64/net/bpf_jit.h
+++ b/arch/arm64/net/bpf_jit.h
@@ -1,7 +1,7 @@
 /*
  * BPF JIT compiler for ARM64
  *
- * Copyright (C) 2014 Zi Shen Lim <zlim.lnx@gmail.com>
+ * Copyright (C) 2014-2015 Zi Shen Lim <zlim.lnx@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -35,6 +35,7 @@
 	aarch64_insn_gen_comp_branch_imm(0, offset, Rt, A64_VARIANT(sf), \
 		AARCH64_INSN_BRANCH_COMP_##type)
 #define A64_CBZ(sf, Rt, imm19) A64_COMP_BRANCH(sf, Rt, (imm19) << 2, ZERO)
+#define A64_CBNZ(sf, Rt, imm19) A64_COMP_BRANCH(sf, Rt, (imm19) << 2, NONZERO)
 
 /* Conditional branch (immediate) */
 #define A64_COND_BRANCH(cond, offset) \
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index c047598..9ae6f23 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -1,7 +1,7 @@
 /*
  * BPF JIT compiler for ARM64
  *
- * Copyright (C) 2014 Zi Shen Lim <zlim.lnx@gmail.com>
+ * Copyright (C) 2014-2015 Zi Shen Lim <zlim.lnx@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -225,6 +225,17 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
 	u8 jmp_cond;
 	s32 jmp_offset;
 
+#define check_imm(bits, imm) do {				\
+	if ((((imm) > 0) && ((imm) >> (bits))) ||		\
+	    (((imm) < 0) && (~(imm) >> (bits)))) {		\
+		pr_info("[%2d] imm=%d(0x%x) out of range\n",	\
+			i, imm, imm);				\
+		return -EINVAL;					\
+	}							\
+} while (0)
+#define check_imm19(imm) check_imm(19, imm)
+#define check_imm26(imm) check_imm(26, imm)
+
 	switch (code) {
 	/* dst = src */
 	case BPF_ALU | BPF_MOV | BPF_X:
@@ -258,8 +269,21 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
 		break;
 	case BPF_ALU | BPF_DIV | BPF_X:
 	case BPF_ALU64 | BPF_DIV | BPF_X:
+	{
+		const u8 r0 = bpf2a64[BPF_REG_0];
+
+		/* if (src == 0) return 0 */
+		jmp_offset = 3; /* skip ahead to else path */
+		check_imm19(jmp_offset);
+		emit(A64_CBNZ(is64, src, jmp_offset), ctx);
+		emit(A64_MOVZ(1, r0, 0, 0), ctx);
+		jmp_offset = epilogue_offset(ctx);
+		check_imm26(jmp_offset);
+		emit(A64_B(jmp_offset), ctx);
+		/* else */
 		emit(A64_UDIV(is64, dst, dst, src), ctx);
 		break;
+	}
 	case BPF_ALU | BPF_MOD | BPF_X:
 	case BPF_ALU64 | BPF_MOD | BPF_X:
 		ctx->tmp_used = 1;
@@ -393,17 +417,6 @@ emit_bswap_uxt:
 		emit(A64_ASR(is64, dst, dst, imm), ctx);
 		break;
 
-#define check_imm(bits, imm) do {				\
-	if ((((imm) > 0) && ((imm) >> (bits))) ||		\
-	    (((imm) < 0) && (~(imm) >> (bits)))) {		\
-		pr_info("[%2d] imm=%d(0x%x) out of range\n",	\
-			i, imm, imm);				\
-		return -EINVAL;					\
-	}							\
-} while (0)
-#define check_imm19(imm) check_imm(19, imm)
-#define check_imm26(imm) check_imm(26, imm)
-
 	/* JUMP off */
 	case BPF_JMP | BPF_JA:
 		jmp_offset = bpf2a64_offset(i + off, i, ctx);
-- 
1.9.1

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#1302072 — [PATCH 4.2.y-ckt 099/211] lib/hexdump.c: truncate output in case of overflow

4.2.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

commit 9f029f540c2f7e010e4922d44ba0dfd05da79f88 upstream.

There is a classical off-by-one error in case when we try to place, for
example, 1+1 bytes as hex in the buffer of size 6.  The expected result is
to get an output truncated, but in the reality we get 6 bytes filed
followed by terminating NUL.

Change the logic how we fill the output in case of byte dumping into
limited space.  This will follow the snprintf() behaviour by truncating
output even on half bytes.

Fixes: 114fc1afb2de (hexdump: make it return number of bytes placed in buffer)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reported-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Tested-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 lib/hexdump.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/hexdump.c b/lib/hexdump.c
index 8d74c20..992457b 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -169,11 +169,15 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize,
 		}
 	} else {
 		for (j = 0; j < len; j++) {
-			if (linebuflen < lx + 3)
+			if (linebuflen < lx + 2)
 				goto overflow2;
 			ch = ptr[j];
 			linebuf[lx++] = hex_asc_hi(ch);
+			if (linebuflen < lx + 2)
+				goto overflow2;
 			linebuf[lx++] = hex_asc_lo(ch);
+			if (linebuflen < lx + 2)
+				goto overflow2;
 			linebuf[lx++] = ' ';
 		}
 		if (j)
-- 
1.9.1

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