Hi there,
since kernel 6.10 I see this in dmesg
[ 1110.417792] BUG: kernel NULL pointer dereference, address:
00000000000003a6
[ 1110.417835] #PF: supervisor read access in kernel mode
[ 1110.417843] #PF: error_code(0x0000) - not-present page
[ 1110.417850] PGD 0 P4D 0
[ 1110.417856] Oops: Oops: 0000 [#1] PREEMPT SMP PTI
[ 1110.417864] CPU: 6 PID: 79 Comm: kworker/u32:4 Tainted:
G T 6.10.0 #1
[ 1110.417875] Hardware name: Dell Inc. PowerEdge R210 II/03X6X0, BIOS
2.10.0 05/24/2018
[ 1110.417884] Workqueue: writeback wb_workfn (flush-0:67)
[ 1110.417895] RIP: 0010:nfs_folio_find_private_request+0x3c/0xa0
[ 1110.417905] Code: 8b 07 f6 c4 08 75 56 4c 8b 63 18 48 8b 03 31 ed f6
c4 40 74 3c 49 83 c4 48 4c 89 e7 e8 7d 0a e7 00 48 8b 6b 28 48 85 ed 74
1f <48> 39 6d 50 75 4f 48 8d 7d 34 b 8 01 00 00 00 f0 0f c1 45 34 85 c0
[ 1110.417925] RSP: 0018:ffffb1ddc02ff858 EFLAGS: 00010206
[ 1110.417932] RAX: 0000000000000000 RBX: ffffde301370f780 RCX:
000037dc6007b980
[ 1110.417942] RDX: 0000000000000001 RSI: ffffb1ddc02ffb78 RDI:
ffff9a012332cb40
[ 1110.417950] RBP: 0000000000000356 R08: 0000000000000001 R09:
0000000000000048
[ 1110.417959] R10: 0000000000000006 R11: ffffffffffffffff R12:
ffff9a012332cb40
[ 1110.417968] R13: ffff9a012332c970 R14: ffff9a012332c970 R15:
ffffb1ddc02ff93c
[ 1110.417977] FS: 0000000000000000(0000) GS:ffff9a015fc00000(0000)
knlGS:000000000000000 0
[ 1110.417986] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1110.417994] CR2: 00000000000003a6 CR3: 0000000447242004 CR4:
00000000001706f0
[ 1110.418003] Call Trace:
[ 1110.418008] <TASK>
[ 1110.418012] ? __die_body.cold+0x19/0x2c
[ 1110.418020] ? page_fault_oops+0x155/0x2b0
[ 1110.418028] ? search_module_extables+0x10/0x50
[ 1110.418036] ? search_bpf_extables+0x56/0x80
[ 1110.418044] ? exc_page_fault+0x66/0xb0
[ 1110.418052] ? asm_exc_page_fault+0x22/0x30
[ 1110.418061] ? nfs_folio_find_private_request+0x3c/0xa0
[ 1110.418069] ? nfs_folio_find_private_request+0x33/0xa0
[ 1110.418076] nfs_lock_and_join_requests+0xd8/0x290
[ 1110.418084] ? __mod_memcg_lruvec_state+0xfc/0x1d0
[ 1110.418093] nfs_page_async_flush+0x16/0x320
[ 1110.418100] ? __pfx_nfs_writepages_callback+0x10/0x10
[ 1110.418107] nfs_writepages_callback+0x3d/0x70
[ 1110.418283] write_cache_pages+0x5f/0xb0
[ 1110.418426] nfs_writepages+0x13d/0x210
[ 1110.418567] do_writepages+0x78/0x280
[ 1110.418706] ? __skb_datagram_iter+0x76/0x2a0
[ 1110.418846] ? __pfx_simple_copy_to_iter+0x10/0x10
[ 1110.418986] __writeback_single_inode+0x30/0x190
[ 1110.419123] ? select_task_rq_fair+0x7e8/0x1db0
[ 1110.419258] writeback_sb_inodes+0x21a/0x4a0
[ 1110.419394] __writeback_inodes_wb+0x47/0xe0
[ 1110.419529] wb_writeback.isra.0+0x174/0x1e0
[ 1110.419662] wb_workfn+0x1e8/0x310
[ 1110.419794] process_one_work+0x16d/0x280
[ 1110.419924] worker_thread+0x256/0x390
[ 1110.420052] ? __pfx_worker_thread+0x10/0x10
[ 1110.420177] kthread+0xc9/0x100
[ 1110.420301] ? __pfx_kthread+0x10/0x10
[ 1110.420425] ret_from_fork+0x2b/0x40
[ 1110.420548] ? __pfx_kthread+0x10/0x10
[ 1110.420670] ret_from_fork_asm+0x1a/0x30
[ 1110.420791] </TASK>
[ 1110.420924] Modules linked in: tls nft_chain_nat xt_MASQUERADE nf_nat
nf_conntrack_netl ink xt_addrtype dm_thin_pool dm_persistent_data
dm_bio_prison ts_bm nft_limit xt_string xt _connlimit nf_conncount
xt_limit xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 x
t_hashlimit nft_compat nf_tables sch_prio act_police cls_u32 sch_ingress
iscsi_tcp libiscs i_tcp rdma_ucm ib_iser libiscsi rdma_rxe ib_uverbs
ip6_udp_tunnel udp_tunnel scsi_transpor t_iscsi ip_set_hash_ip lz4
lz4_compress jc42 gpio_ich kvm_intel kvm bnx2 lpc_ich sch_fq_co del
dm_multipath zstd raid0 polyval_clmulni polyval_generic sha512_ssse3
sha256_ssse3 sha1 _ssse3 scsi_dh_rdac scsi_dh_emc scsi_dh_alua fuse
br_netfilter bridge stp llc mgag200 drm_ shmem_helper snd_aloop snd_pcm
snd_timer snd soundcore i915 i2c_algo_bit drm_buddy ttm drm
_display_helper i2c_dev msr
[ 1110.421864] CR2: 00000000000003a6
[ 1110.421988] ---[ end trace 0000000000000000 ]---
[ 1110.430766] RIP: 0010:nfs_folio_find_private_request+0x3c/0xa0
[ 1110.430997] Code: 8b 07 f6 c4 08 75 56 4c 8b 63 18 48 8b 03 31 ed f6
c4 40 74 3c 49 83 c4 48 4c 89 e7 e8 7d 0a e7 00 48 8b 6b 28 48 85 ed 74
1f <48> 39 6d 50 75 4f 48 8d 7d 34 b 8 01 00 00 00 f0 0f c1 45 34 85 c0
[ 1110.431266] RSP: 0018:ffffb1ddc02ff858 EFLAGS: 00010206
[ 1110.431400] RAX: 0000000000000000 RBX: ffffde301370f780 RCX:
000037dc6007b980
[ 1110.431536] RDX: 0000000000000001 RSI: ffffb1ddc02ffb78 RDI:
ffff9a012332cb40
[ 1110.431673] RBP: 0000000000000356 R08: 0000000000000001 R09:
0000000000000048
[ 1110.431810] R10: 0000000000000006 R11: ffffffffffffffff R12:
ffff9a012332cb40
[ 1110.431949] R13: ffff9a012332c970 R14: ffff9a012332c970 R15:
ffffb1ddc02ff93c
[ 1110.432088] FS: 0000000000000000(0000) GS:ffff9a015fc00000(0000)
knlGS:000000000000000 0
[ 1110.432231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1110.432373] CR2: 00000000000003a6 CR3: 0000000447242004 CR4:
00000000001706f0
[ 1110.432518] note: kworker/u32:4[79] exited with irqs disabled
[ 1110.432677] note: kworker/u32:4[79] exited with preempt_count 1
[ 1110.432847] ------------[ cut here ]------------
[ 1110.433033] WARNING: CPU: 6 PID: 79 at kernel/exit.c:825
do_exit+0x82b/0xa40
[ 1110.433184] Modules linked in: tls nft_chain_nat xt_MASQUERADE nf_nat
nf_conntrack_netl ink xt_addrtype dm_thin_pool dm_persistent_data
dm_bio_prison ts_bm nft_limit xt_string xt _connlimit nf_conncount
xt_limit xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 x
t_hashlimit nft_compat nf_tables sch_prio act_police cls_u32 sch_ingress
iscsi_tcp libiscs i_tcp rdma_ucm ib_iser libiscsi rdma_rxe ib_uverbs
ip6_udp_tunnel udp_tunnel scsi_transpor t_iscsi ip_set_hash_ip lz4
lz4_compress jc42 gpio_ich kvm_intel kvm bnx2 lpc_ich sch_fq_co del
dm_multipath zstd raid0 polyval_clmulni polyval_generic sha512_ssse3
sha256_ssse3 sha1 _ssse3 scsi_dh_rdac scsi_dh_emc scsi_dh_alua fuse
br_netfilter bridge stp llc mgag200 drm_ shmem_helper snd_aloop snd_pcm
snd_timer snd soundcore i915 i2c_algo_bit drm_buddy ttm drm
_display_helper i2c_dev msr
[ 1110.434416] CPU: 6 PID: 79 Comm: kworker/u32:4 Tainted: G D
T 6.10.0 #1
[ 1110.434588] Hardware name: Dell Inc. PowerEdge R210 II/03X6X0, BIOS
2.10.0 05/24/2018
[ 1110.434792] Workqueue: writeback wb_workfn (flush-0:67)
[ 1110.434976] RIP: 0010:do_exit+0x82b/0xa40
[ 1110.435151] Code: 83 d0 0c 00 00 e9 e9 fd ff ff 48 8b bb 90 0a 00 00
31 f6 e8 97 e2 ff ff e9 6f fd ff ff 48 89 df e8 da 4a 0f 00 e9 cd f9 ff
ff <0f> 0b e9 40 f8 ff ff 4c 89 e6 b f 05 06 00 00 e8 41 f0 00 00 e9 c3
[ 1110.435533] RSP: 0018:ffffb1ddc02ffed8 EFLAGS: 00010282
[ 1110.435725] RAX: 0000000000000000 RBX: ffff99fa40b5c000 RCX:
0000000000000000
[ 1110.435918] RDX: 0000000000000001 RSI: 0000000000002710 RDI:
ffff99fa40bd18c0
[ 1110.436115] RBP: ffff99fa40bde300 R08: 0000000000000000 R09:
ffffb1ddc02ffdc8
[ 1110.436311] R10: ffffffffa334b428 R11: 0000000000000003 R12:
0000000000000009
[ 1110.436509] R13: ffff99fa40bd18c0 R14: 0000000000000000 R15:
0000000000000000
[ 1110.436707] FS: 0000000000000000(0000) GS:ffff9a015fc00000(0000)
knlGS:000000000000000 0
[ 1110.436908] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1110.437130] CR2: 00000000000003a6 CR3: 0000000447242004 CR4:
00000000001706f0
[ 1110.437348] Call Trace:
[ 1110.437556] <TASK>
[ 1110.437750] ? __warn+0x7f/0xb1
[ 1110.437943] ? do_exit+0x82b/0xa40
[ 1110.438133] ? report_bug+0xf6/0x140
[ 1110.438319] ? handle_bug+0x3c/0x80
[ 1110.438500] ? exc_invalid_op+0x13/0x60
[ 1110.438694] ? asm_exc_invalid_op+0x16/0x20
[ 1110.438872] ? do_exit+0x82b/0xa40
[ 1110.439050] ? do_exit+0x64/0xa40
[ 1110.439243] make_task_dead+0x88/0x90
[ 1110.439412] rewind_stack_and_make_dead+0x16/0x20
[ 1110.439577] RIP: 0000:0x0
[ 1110.439756] Code: Unable to access opcode bytes at 0xffffffffffffffd6.
[ 1110.439918] RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX:
0000000000000000
[ 1110.440085] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
0000000000000000
[ 1110.440267] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
0000000000000000
[ 1110.440428] RBP: 0000000000000000 R08: 0000000000000000 R09:
0000000000000000
[ 1110.440596] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000000
[ 1110.440762] R13: 0000000000000000 R14: 0000000000000000 R15:
0000000000000000
[ 1110.440917] </TASK>
[ 1110.441068] ---[ end trace 0000000000000000 ]---
I really don't know what's happening here
thanks for your help
Sarah
