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Groups > linux.kernel > #1387803
| From | Kamal Mostafa <kamal@canonical.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 4.2.y-ckt 77/93] x86/mm/xen: Suppress hugetlbfs in PV guests |
| Date | 2016-04-26 20:30 +0200 |
| Message-ID | <rsfUe-3TD-13@gated-at.bofh.it> (permalink) |
| References | <rsfKx-3Nr-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
4.2.8-ckt9 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Jan Beulich <JBeulich@suse.com> commit 103f6112f253017d7062cd74d17f4a514ed4485c upstream. Huge pages are not normally available to PV guests. Not suppressing hugetlbfs use results in an endless loop of page faults when user mode code tries to access a hugetlbfs mapped area (since the hypervisor denies such PTEs to be created, but error indications can't be propagated out of xen_set_pte_at(), just like for various of its siblings), and - once killed in an oops like this: kernel BUG at .../fs/hugetlbfs/inode.c:428! invalid opcode: 0000 [#1] SMP ... RIP: e030:[<ffffffff811c333b>] [<ffffffff811c333b>] remove_inode_hugepages+0x25b/0x320 ... Call Trace: [<ffffffff811c3415>] hugetlbfs_evict_inode+0x15/0x40 [<ffffffff81167b3d>] evict+0xbd/0x1b0 [<ffffffff8116514a>] __dentry_kill+0x19a/0x1f0 [<ffffffff81165b0e>] dput+0x1fe/0x220 [<ffffffff81150535>] __fput+0x155/0x200 [<ffffffff81079fc0>] task_work_run+0x60/0xa0 [<ffffffff81063510>] do_exit+0x160/0x400 [<ffffffff810637eb>] do_group_exit+0x3b/0xa0 [<ffffffff8106e8bd>] get_signal+0x1ed/0x470 [<ffffffff8100f854>] do_signal+0x14/0x110 [<ffffffff810030e9>] prepare_exit_to_usermode+0xe9/0xf0 [<ffffffff814178a5>] retint_user+0x8/0x13 This is CVE-2016-3961 / XSA-174. Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Juergen Gross <JGross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luis R. Rodriguez <mcgrof@suse.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Toshi Kani <toshi.kani@hp.com> Cc: xen-devel <xen-devel@lists.xenproject.org> Link: http://lkml.kernel.org/r/57188ED802000078000E431C@prv-mh.provo.novell.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- arch/x86/include/asm/hugetlb.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h index f8a29d2..e6a8613 100644 --- a/arch/x86/include/asm/hugetlb.h +++ b/arch/x86/include/asm/hugetlb.h @@ -4,6 +4,7 @@ #include <asm/page.h> #include <asm-generic/hugetlb.h> +#define hugepages_supported() cpu_has_pse static inline int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, -- 2.7.4
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[4.2.y-ckt stable] Linux 4.2.8-ckt9 stable review Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 01/93] usbnet: cleanup after bind() in probe() Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 17/93] xfrm: Fix crash observed during device unregistration and decryption Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 37/93] ALSA: hda/realtek - Enable the ALC292 dock fixup on the Thinkpad T460s Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 13/93] macvtap: always pass ethernet header in linear Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 41/93] ALSA: hda - Fix regression of monitor_present flag in eld proc file Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 07/93] cdc_ncm: toggle altsetting to force reset before setup Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 44/93] usb: xhci: applying XHCI_PME_STUCK_QUIRK to Intel BXT B0 host Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 19/93] rtnl: fix msg size calculation in if_nlmsg_size() Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 23/93] ipv6: Count in extension headers in skb->network_header Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 87/93] Input: pmic8xxx-pwrkey - fix algorithm for converting trigger delay Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 67/93] futex: Handle unlock_pi race gracefully Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 12/93] sh_eth: fix NULL pointer dereference in sh_eth_ring_format() Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:20 +0200
[PATCH 4.2.y-ckt 72/93] drm/amdgpu: use defines for CRTCs and AMFT blocks Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 63/93] powerpc: Update cpu_user_features2 in scan_features() Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 77/93] x86/mm/xen: Suppress hugetlbfs in PV guests Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 73/93] drm/amdgpu: bump the afmt limit for CZ, ST, Polaris Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 64/93] powerpc: Update TM user feature bits in scan_features() Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 91/93] net/mlx4_core: Avoid repeated calls to pci enable/disable Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 86/93] net: bcmgenet: device stats are unsigned long Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 66/93] usb: gadget: f_fs: Fix use-after-free Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 89/93] net: ethernet: davinci_emac: Fix platform_data overwrite Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 80/93] s390/scm_blk: fix deadlock for requests != REQ_TYPE_FS Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 74/93] drm/radeon: forbid mapping of userptr bo through radeon device file Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 92/93] atl2: Disable unimplemented scatter/gather feature Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 90/93] net/mlx4_core: Implement pci_resume callback Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 68/93] futex: Acknowledge a new waiter in counter before plist Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 69/93] asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic() Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 75/93] amdgpu/uvd: add uvd fw version for amdgpu Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 79/93] x86 EDAC, sb_edac.c: Take account of channel hashing when needed Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 93/93] openvswitch: use flow protocol when recalculating ipv6 checksums Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 81/93] packet: fix heap info leak in PACKET_DIAG_MCLIST sock_diag interface Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 83/93] bpf/verifier: reject invalid LD_ABS | BPF_DW instruction Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 78/93] x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 85/93] s390/spinlock: avoid yield to non existent cpu Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 84/93] pinctrl: single: Fix pcs_parse_bits_in_pinctrl_entry to use __ffs than ffs Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 82/93] net: sched: do not requeue a NULL skb Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 62/93] powerpc: scan_features() updates incorrect bits for REAL_LE Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 71/93] drm/dp/mst: Validate port in drm_dp_payload_send_msg() Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 70/93] ALSA: pcxhr: Fix missing mutex unlock Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 88/93] net: ethernet: davinci_emac: Fix Unbalanced pm_runtime_enable Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:30 +0200
[PATCH 4.2.y-ckt 54/93] pinctrl: mediatek: correct debounce time unit in mtk_gpio_set_debounce Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 39/93] nl80211: check netlink protocol in socket release notification Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 45/93] xhci: resume USB 3 roothub first Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 65/93] drm/radeon: add a quirk for a XFX R9 270X Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 49/93] USB: uas: Add a new NO_REPORT_LUNS quirk Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 48/93] xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 59/93] drm/i915/userptr: Hold mmref whilst calling get-user-pages Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 38/93] ALSA: usb-audio: Skip volume controls triggers hangup on Dell USB Dock Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 28/93] drm/qxl: fix cursor position with non-zero hotspot Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 35/93] kvm: x86: do not leak guest xcr0 into host interrupt handlers Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 55/93] crypto: sha1-mb - use corrcet pointer while completing jobs Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 56/93] crypto: ccp - Prevent information leakage on export Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 33/93] ALSA: usb-audio: Add a quirk for Plantronics BT300 Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 51/93] drm/radeon: fix initial connector audio value Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 60/93] drm/i915: Use fw_domains_put_with_fifo() on HSW Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 29/93] Input: gtco - fix crash on detecting device without endpoints Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 36/93] netlink: don't send NETLINK_URELEASE for unbound sockets Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 53/93] dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 47/93] usb: xhci: fix wild pointers in xhci_mem_cleanup Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 46/93] usb: host: xhci: add a new quirk XHCI_NO_64BIT_SUPPORT Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 61/93] ALSA: hda/realtek - Add ALC3234 headset mode for Optiplex 9020m Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 42/93] dmaengine: dw: fix master selection Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 58/93] video: ARM CLCD: runtime check for Versatile Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 40/93] debugfs: Make automount point inodes permanently empty Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 57/93] dm cache metadata: fix cmd_read_lock() acquiring write lock Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 52/93] drm/amdgpu: when suspending, if uvd/vce was running. need to cancel delay work. Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 50/93] usb: hcd: out of bounds access in for_each_companion Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 30/93] s390/pci: add extra padding to function measurement block Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 34/93] assoc_array: don't call compare_object() on a node Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 43/93] lib: lz4: fixed zram with lz4 on big endian machines Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 32/93] dmaengine: hsu: correct use of channel status register Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:40 +0200
[PATCH 4.2.y-ckt 08/93] udp6: fix UDP/IPv6 encap resubmit path Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 31/93] ALSA: usb-audio: Add a sample rate quirk for Phoenix Audio TMX320 Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 15/93] qlge: Fix receive packets drop. Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 11/93] packet: validate variable length ll headers Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 27/93] ARM: mvebu: Correct unit address for linksys Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 26/93] ARM: OMAP2+: hwmod: Fix updating of sysconfig register Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 06/93] qmi_wwan: add Sierra Wireless EM74xx device ID Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 14/93] farsync: fix off-by-one bug in fst_add_one Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 18/93] qmi_wwan: add "D-Link DWM-221 B1" device id Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 03/93] net: jme: fix suspend/resume on JMC260 Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 25/93] HID: usbhid: fix inconsistent reset/resume/reset-resume behavior Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 16/93] bonding: fix bond_get_stats() Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 09/93] net: validate variable length ll headers Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 02/93] tunnel: Clear IPCB(skb)->opt before dst_link_failure called Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 05/93] sctp: lack the check for ports in sctp_v6_cmp_addr Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 22/93] ipv6: l2tp: fix a potential issue in l2tp_ip6_recv Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 24/93] iwlwifi: pcie: lower the debug level for RSA semaphore access Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 10/93] ax25: add link layer header validation function Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 04/93] net: qca_spi: clear IFF_TX_SKB_SHARING Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 20/93] tun, bpf: fix suspicious RCU usage in tun_{attach, detach}_filter Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
[PATCH 4.2.y-ckt 21/93] ipv4: l2tp: fix a potential issue in l2tp_ip_recv Kamal Mostafa <kamal@canonical.com> - 2016-04-26 20:50 +0200
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