WARNING in blk_mq_release

Status: upstream: reported C repro on 2026/08/04 19:49
Reported-by: syzbot+d0cf39154a61fbf95a18@syzkaller.appspotmail.com
First crash: 50d, last: 21h47m
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in blk_mq_release block -1 syz, C error 11 1488d 1507d 22/29 fixed on 2023/02/24 13:50

Sample crash report:
nvme nvme0: Removing ctrl: NQN "testsubsys"
------------[ cut here ]------------
WARNING: CPU: 0 PID: 47 at block/blk-mq.c:4133 blk_mq_release+0x104/0x2c0 block/blk-mq.c:4133
Modules linked in:
CPU: 0 PID: 47 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: nvme-delete-wq nvme_delete_ctrl_work
RIP: 0010:blk_mq_release+0x104/0x2c0 block/blk-mq.c:4133
Code: 89 df 4c 89 fe 48 c7 c2 ff ff ff ff b9 08 00 00 00 e8 00 ca 28 06 48 85 c0 74 13 49 89 c4 e8 83 10 85 fd eb af e8 7c 10 85 fd <0f> 0b eb d1 e8 73 10 85 fd eb 05 e8 6c 10 85 fd 48 8b 44 24 18 4c
RSP: 0018:ffffc90000b879a0 EFLAGS: 00010293
RAX: ffffffff83fd2264 RBX: ffff8880276be508 RCX: ffff88801bab1e00
RDX: 0000000000000000 RSI: ffffffff8a8c2a20 RDI: ffffffff8adf68a0
RBP: ffffc90000b87a68 R08: ffffffff8e20b46f R09: 1ffffffff1c4168d
R10: dffffc0000000000 R11: fffffbfff1c4168e R12: ffff888079b8caa8
R13: dffffc0000000000 R14: 1ffff92000170f3c R15: ffffc90000b87a00
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00001c8a7f642e60 CR3: 000000002fd1e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 blk_release_queue+0x12a/0x1e0 block/blk-sysfs.c:774
 kobject_cleanup lib/kobject.c:681 [inline]
 kobject_release lib/kobject.c:712 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x217/0x450 lib/kobject.c:729
 nvme_free_ctrl+0xc2/0x510 drivers/nvme/host/core.c:5196
 device_release+0x92/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:681 [inline]
 kobject_release lib/kobject.c:712 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x217/0x450 lib/kobject.c:729
 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Crashes (108):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/15 12:01 linux-6.1.y 1a8763b93150 81a27d1a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/17 07:22 linux-6.1.y 1a8763b93150 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/17 02:56 linux-6.1.y 1a8763b93150 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/16 18:31 linux-6.1.y 1a8763b93150 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/16 04:17 linux-6.1.y 1a8763b93150 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/15 00:45 linux-6.1.y 1a8763b93150 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/11 22:22 linux-6.1.y cf82dcca9634 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/10 20:06 linux-6.1.y cf82dcca9634 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/09 02:26 linux-6.1.y cf82dcca9634 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/04 14:35 linux-6.1.y cf82dcca9634 f65209a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/04 02:04 linux-6.1.y cf82dcca9634 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/03 09:23 linux-6.1.y cf82dcca9634 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/02 21:07 linux-6.1.y cf82dcca9634 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/02 18:45 linux-6.1.y cf82dcca9634 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/02 11:38 linux-6.1.y d64a499eea6b 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/01 19:02 linux-6.1.y d64a499eea6b 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/01 15:45 linux-6.1.y d64a499eea6b 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/01 15:45 linux-6.1.y d64a499eea6b 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/31 23:03 linux-6.1.y d64a499eea6b 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/31 21:32 linux-6.1.y d64a499eea6b 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/30 05:14 linux-6.1.y d64a499eea6b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/29 04:01 linux-6.1.y d64a499eea6b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/29 01:45 linux-6.1.y d64a499eea6b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/28 14:23 linux-6.1.y d64a499eea6b e2fa417d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/28 05:09 linux-6.1.y 79a9660d699e 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/26 18:01 linux-6.1.y 05208478041c a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/26 18:01 linux-6.1.y 05208478041c a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/26 11:45 linux-6.1.y 05208478041c 6a91adb4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/25 16:57 linux-6.1.y 05208478041c a9a1fc32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/25 05:24 linux-6.1.y 05208478041c 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/24 17:45 linux-6.1.y 05208478041c b55bd4c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/23 19:43 linux-6.1.y 05208478041c 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/20 17:22 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/20 03:29 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/18 09:26 linux-6.1.y e4f7d8be268e 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/16 08:03 linux-6.1.y e4f7d8be268e 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/16 06:31 linux-6.1.y e4f7d8be268e 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/13 23:50 linux-6.1.y e4f7d8be268e b13552fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/13 23:49 linux-6.1.y e4f7d8be268e b13552fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/13 23:48 linux-6.1.y e4f7d8be268e b13552fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/12 07:57 linux-6.1.y e4f7d8be268e f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/12 07:45 linux-6.1.y e4f7d8be268e f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/12 07:44 linux-6.1.y e4f7d8be268e f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/12 07:44 linux-6.1.y e4f7d8be268e f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/09/23 18:03 linux-6.1.y 1a8763b93150 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in blk_mq_release
2026/09/17 23:26 linux-6.1.y 1a8763b93150 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in blk_mq_release
2026/09/15 22:41 linux-6.1.y 1a8763b93150 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in blk_mq_release
2026/09/15 22:41 linux-6.1.y 1a8763b93150 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in blk_mq_release
2026/09/15 07:12 linux-6.1.y 1a8763b93150 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in blk_mq_release
2026/08/28 17:55 linux-6.1.y d64a499eea6b e2fa417d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in blk_mq_release
2026/08/04 19:48 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in blk_mq_release
* Struck through repros no longer work on HEAD.