WARNING in blk_mq_release

Status: upstream: reported on 2026/08/04 19:49
Reported-by: syzbot+d0cf39154a61fbf95a18@syzkaller.appspotmail.com
First crash: 27d, last: 14h44m
▶ ▼ 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 1465d 1484d 22/29 fixed on 2023/02/24 13:50

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5289 at block/blk-mq.c:4133 blk_mq_release+0x104/0x2c0 block/blk-mq.c:4133
Modules linked in:
CPU: 0 PID: 5289 Comm: kworker/u4:21 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 50 92 27 06 48 85 c0 74 13 49 89 c4 e8 83 67 85 fd eb af e8 7c 67 85 fd <0f> 0b eb d1 e8 73 67 85 fd eb 05 e8 6c 67 85 fd 48 8b 44 24 18 4c
RSP: 0018:ffffc900034179a0 EFLAGS: 00010293
RAX: ffffffff83fcca14 RBX: ffff8880278ee508 RCX: ffff88802691da00
RDX: 0000000000000000 RSI: ffffffff8a8c29a0 RDI: ffffffff8adf6220
RBP: ffffc90003417a68 R08: ffffffff8e21116f R09: 1ffffffff1c4222d
R10: dffffc0000000000 R11: fffffbfff1c4222e R12: ffff888055de2aa8
R13: dffffc0000000000 R14: 1ffff92000682f3c R15: ffffc90003417a00
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd10a1f62a0 CR3: 0000000029828000 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 (79):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/08/12 07:43 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 06:19 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 06:04 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 01:21 linux-6.1.y e4f7d8be268e 71790083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/07 17:43 linux-6.1.y e4f7d8be268e e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/07 17:04 linux-6.1.y e4f7d8be268e e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/07 03:19 linux-6.1.y 03f3a99e8e93 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/06 18:06 linux-6.1.y fb28aa725e05 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/06 04:20 linux-6.1.y fb28aa725e05 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/05 22:44 linux-6.1.y fb28aa725e05 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/05 00:57 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/05 00:45 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/05 00:15 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/05 00:12 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/05 00:09 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/04 23:03 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/04 23:02 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/04 21:43 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in blk_mq_release
2026/08/04 21:41 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan 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
2026/08/08 11:55 linux-6.1.y e4f7d8be268e 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in blk_mq_release
2026/08/04 21:41 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
2026/08/04 20:20 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
2026/08/04 20:19 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
2026/08/04 20:07 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
2026/08/04 20:07 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
2026/08/04 20:04 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
2026/08/04 20:03 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
2026/08/04 19:55 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
2026/08/04 19:51 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
2026/08/04 19:50 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
2026/08/04 19:50 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
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.