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Bug#1092889: linux-image-6.1.0-29-arm64: oops in nft_rhash_gc

Cross-posted to 2 groups.

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Control: reassign -1 src:linux
Control: forcemerge 1092772 -1

Hi,

On Sun, Jan 12, 2025 at 09:50:38PM +0100, Valentin Vidic wrote:
> Package: linux-image-6.1.0-29-arm64
> Version: 6.1.123-1
> Severity: important
> Tags: upstream
> 
> Dear Maintainer,
> 
> After upgrading from linux-image-6.1.0-28-arm64 to linux-image-6.1.0-29-arm64
> ARM VM started crashing after some hours of uptime always with the error below.
> 
> Based on the trace, the following patch might be the problem:
> 
>   - netfilter: nft_set_hash: skip duplicated elements pending gc run
> 
> [ 5016.757904] Unable to handle kernel paging request at virtual address ffff0000c5ef908c
> [ 5016.760168] Mem abort info:
> [ 5016.760947]   ESR = 0x0000000096000021
> [ 5016.762121]   EC = 0x25: DABT (current EL), IL = 32 bits
> [ 5016.763805]   SET = 0, FnV = 0
> [ 5016.764321]   EA = 0, S1PTW = 0
> [ 5016.764663]   FSC = 0x21: alignment fault
> [ 5016.765538] Data abort info:
> [ 5016.766461]   ISV = 0, ISS = 0x00000021
> [ 5016.767176]   CM = 0, WnR = 0
> [ 5016.768240] swapper pgtable: 4k pages, 48-bit VAs, pgdp=000000006529a000
> [ 5016.769250] [ffff0000c5ef908c] pgd=1800000139ff8003, p4d=1800000139ff8003, pud=18000001399fe003, pmd=18000001399ce003, pte=0068000105ef9f07
> [ 5016.771508] Internal error: Oops: 0000000096000021 [#1] SMP
> [ 5016.772286] Modules linked in: wireguard libchacha20poly1305 chacha_neon poly1305_neon libcurve25519_generic libchacha ip6_udp_tunnel udp_tunnel binfmt_misc nls_ascii nls_cp437 vfat fat nft_nat joydev nft_chain_nat nf_nat hid_generic usbhid virtio_gpu arm_smccc_trng virtio_dma_buf hid nf_log_syslog drm_shmem_helper virtio_balloon virtio_console drm_kms_helper evdev sg nft_log nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables nfnetlink loop fuse drm efi_pstore dm_mod dax configfs qemu_fw_cfg virtio_rng ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 btrfs blake2b_generic zstd_compress efivarfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod sd_mod t10_pi crc64_rocksoft_generic crc64_rocksoft crc_t10dif crct10dif_generic sr_mod cdrom crc64 crct10dif_ce crct10dif_common polyval_ce polyval_generic ghash_ce gf128mul
> [ 5016.772363]  virtio_scsi sha2_ce scsi_mod scsi_common sha256_arm64 virtio_net net_failover failover xhci_pci sha1_ce xhci_hcd usbcore usb_common virtio_mmio virtio_pci virtio_pci_legacy_dev virtio_pci_modern_dev aes_neon_bs aes_neon_blk aes_ce_blk aes_ce_cipher
> [ 5016.786092] CPU: 1 PID: 1078 Comm: kworker/1:0 Not tainted 6.1.0-29-arm64 #1  Debian 6.1.123-1
> [ 5016.787058] Hardware name: Hetzner vServer/KVM Virtual Machine, BIOS 20171111 11/11/2017
> [ 5016.788042] Workqueue: events_power_efficient nft_rhash_gc [nf_tables]
> [ 5016.788720] pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> [ 5016.789422] pc : nft_rhash_gc+0x1f8/0x2b4 [nf_tables]
> [ 5016.789965] lr : nft_rhash_gc+0x128/0x2b4 [nf_tables]
> [ 5016.790515] sp : ffff80000849bcf0
> [ 5016.790892] x29: ffff80000849bcf0 x28: ffff0000f97f6700 x27: 0000000000000000
> [ 5016.791651] x26: ffff0000c34da8f0 x25: ffff0000c910d300 x24: ffff0000c34d2978
> [ 5016.792382] x23: 0000000000000016 x22: ffff0000c1d41000 x21: ffff0000c34da978
> [ 5016.793108] x20: ffff0000cb3e1200 x19: ffff0000c5ef9080 x18: 0000000000000000
> [ 5016.793859] x17: 0000000000000000 x16: ffffc7c57442ba40 x15: 0000ffffd2953df8
> [ 5016.794617] x14: ffffffffffffffff x13: 0000000000000030 x12: ffff0000c34da8f0
> [ 5016.795391] x11: ffff0000c0a78700 x10: ffff80000849bd68 x9 : 0000000000000002
> [ 5016.796171] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
> [ 5016.796954] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
> [ 5016.797730] x2 : ffff0000c5ef908c x1 : ffff0000c5ef908c x0 : 0000000000000004
> [ 5016.798499] Call trace:
> [ 5016.798763]  nft_rhash_gc+0x1f8/0x2b4 [nf_tables]
> [ 5016.799259]  process_one_work+0x1f4/0x460
> [ 5016.799729]  worker_thread+0x188/0x4e0
> [ 5016.800143]  kthread+0xe0/0xe4
> [ 5016.800930]  ret_from_fork+0x10/0x20
> [ 5016.801767] Code: 54fff9c4 d503201f d2800080 91003261 (f820303f) 
> [ 5016.802837] ---[ end trace 0000000000000000 ]---

Please see #1092772.

Regards,
Salvatore

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Bug#1092889: linux-image-6.1.0-29-arm64: oops in nft_rhash_gc Valentin Vidic <vvidic@debian.org> - 2025-01-12 22:40 +0100
  Bug#1092889: Acknowledgement (linux-image-6.1.0-29-arm64: oops in nft_rhash_gc) Valentin Vidic <vvidic@debian.org> - 2025-01-12 22:50 +0100
  Bug#1092889: linux-image-6.1.0-29-arm64: oops in nft_rhash_gc Salvatore Bonaccorso <carnil@debian.org> - 2025-01-13 08:40 +0100

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