Hi There's a crash in the test shell/lvchange-rebuild-raid.sh when running the lvm testsuite. It can be reproduced by running "make check_local T=shell/lvchange-rebuild-raid.sh" in a loop. The crash happens in the kernel 6.0 and 6.1-rc3, but not in 5.19. I bisected the crash and it is caused by the commit 0dd84b319352bb8ba64752d4e45396d8b13e6018. I uploaded my .config here (it's 12-core virtual machine): https://people.redhat.com/~mpatocka/testcases/md-crash-config/config.txt Mikulas [ 78.478417] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 78.479166] #PF: supervisor write access in kernel mode [ 78.479671] #PF: error_code(0x0002) - not-present page [ 78.480171] PGD 11557f0067 P4D 11557f0067 PUD 0 [ 78.480626] Oops: 0002 [#1] PREEMPT SMP [ 78.481001] CPU: 0 PID: 73 Comm: kworker/0:1 Not tainted 6.1.0-rc3 #5 [ 78.481661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 [ 78.482471] Workqueue: kdelayd flush_expired_bios [dm_delay] [ 78.483021] RIP: 0010:mempool_free+0x47/0x80 [ 78.483455] Code: 48 89 ef 5b 5d ff e0 f3 c3 48 89 f7 e8 32 45 3f 00 48 63 53 08 48 89 c6 3b 53 04 7d 2d 48 8b 43 10 8d 4a 01 48 89 df 89 4b 08 <48> 89 2c d0 e8 b0 45 3f 00 48 8d 7b 30 5b 5d 31 c9 ba 01 00 00 00 [ 78.485220] RSP: 0018:ffff88910036bda8 EFLAGS: 00010093 [ 78.485719] RAX: 0000000000000000 RBX: ffff8891037b65d8 RCX: 0000000000000001 [ 78.486404] RDX: 0000000000000000 RSI: 0000000000000202 RDI: ffff8891037b65d8 [ 78.487080] RBP: ffff8891447ba240 R08: 0000000000012908 R09: 00000000003d0900 [ 78.487764] R10: 0000000000000000 R11: 0000000000173544 R12: ffff889101a14000 [ 78.488451] R13: ffff8891562ac300 R14: ffff889102b41440 R15: ffffe8ffffa00d05 [ 78.489146] FS: 0000000000000000(0000) GS:ffff88942fa00000(0000) knlGS:0000000000000000 [ 78.489913] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.490474] CR2: 0000000000000000 CR3: 0000001102e99000 CR4: 00000000000006b0 [ 78.491165] Call Trace: [ 78.491429] <TASK> [ 78.491640] clone_endio+0xf4/0x1c0 [dm_mod] [ 78.492072] clone_endio+0xf4/0x1c0 [dm_mod] [ 78.492505] __submit_bio+0x76/0x120 [ 78.492859] submit_bio_noacct_nocheck+0xb6/0x2a0 [ 78.493325] flush_expired_bios+0x28/0x2f [dm_delay] [ 78.493808] process_one_work+0x1b4/0x300 [ 78.494211] worker_thread+0x45/0x3e0 [ 78.494570] ? rescuer_thread+0x380/0x380 [ 78.494957] kthread+0xc2/0x100 [ 78.495279] ? kthread_complete_and_exit+0x20/0x20 [ 78.495743] ret_from_fork+0x1f/0x30 [ 78.496096] </TASK> [ 78.496326] Modules linked in: brd dm_delay dm_raid dm_mod af_packet uvesafb cfbfillrect cfbimgblt cn cfbcopyarea fb font fbdev tun autofs4 binfmt_misc configfs ipv6 virtio_rng virtio_balloon rng_core virtio_net pcspkr net_failover failover qemu_fw_cfg button mousedev raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq raid6_pq async_xor xor async_tx raid1 raid0 md_mod sd_mod t10_pi crc64_rocksoft crc64 virtio_scsi scsi_mod evdev psmouse bsg scsi_common [last unloaded: brd] [ 78.500425] CR2: 0000000000000000 [ 78.500752] ---[ end trace 0000000000000000 ]--- [ 78.501214] RIP: 0010:mempool_free+0x47/0x80 [ 78.501633] Code: 48 89 ef 5b 5d ff e0 f3 c3 48 89 f7 e8 32 45 3f 00 48 63 53 08 48 89 c6 3b 53 04 7d 2d 48 8b 43 10 8d 4a 01 48 89 df 89 4b 08 <48> 89 2c d0 e8 b0 45 3f 00 48 8d 7b 30 5b 5d 31 c9 ba 01 00 00 00 [ 78.503420] RSP: 0018:ffff88910036bda8 EFLAGS: 00010093 [ 78.503921] RAX: 0000000000000000 RBX: ffff8891037b65d8 RCX: 0000000000000001 [ 78.504611] RDX: 0000000000000000 RSI: 0000000000000202 RDI: ffff8891037b65d8 [ 78.505374] RBP: ffff8891447ba240 R08: 0000000000012908 R09: 00000000003d0900 [ 78.506075] R10: 0000000000000000 R11: 0000000000173544 R12: ffff889101a14000 [ 78.506766] R13: ffff8891562ac300 R14: ffff889102b41440 R15: ffffe8ffffa00d05 [ 78.507481] FS: 0000000000000000(0000) GS:ffff88942fa00000(0000) knlGS:0000000000000000 [ 78.508273] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.508837] CR2: 0000000000000000 CR3: 0000001102e99000 CR4: 00000000000006b0 [ 78.509542] note: kworker/0:1[73] exited with preempt_count 1 [ 78.510427] md/raid10:mdX: active with 4 out of 8 devices [ 96.902910] sysrq: Resetting -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel
