syzbot


WARNING in driver_unregister

Status: upstream: reported C repro on 2025/07/20 15:31
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+a1778b11304a198d618d@syzkaller.appspotmail.com
First crash: 149d, last: 1h07m
Bug presence (1)
Date Name Commit Repro Result
2025/07/21 upstream (ToT) 89be9a83ccf1 C [report] WARNING in driver_unregister
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in driver_unregister origin:upstream -1 C 110 33m 161d 0/3 upstream: reported C repro on 2025/07/08 23:37
upstream WARNING in driver_unregister input usb -1 C 1 1304d 1300d 22/29 fixed on 2023/02/24 13:50
upstream WARNING in driver_unregister (2) kernel -1 C error 3214 10d 165d 25/29 upstream: reported C repro on 2025/07/05 03:20
linux-6.6 WARNING in driver_unregister origin:upstream missing-backport -1 C 89 1h39m 149d 0/2 upstream: reported C repro on 2025/07/21 03:57

Sample crash report:
comedi comedi3: c6xdigio: I/O port conflict (0x10,3)
------------[ cut here ]------------
Unexpected driver unregister!
WARNING: CPU: 1 PID: 4429 at drivers/base/driver.c:270 driver_unregister+0x8e/0xa0 drivers/base/driver.c:270
Modules linked in:
CPU: 1 PID: 4429 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:driver_unregister+0x8e/0xa0 drivers/base/driver.c:270
Code: e8 47 b1 00 fd 48 89 df 5b 41 5e 41 5f e9 fa 5c ff ff e8 95 77 7c fc eb 05 e8 8e 77 7c fc 48 c7 c7 a0 c5 02 8b e8 b2 9f 48 fc <0f> 0b 5b 41 5e 41 5f c3 00 00 cc cc 00 00 cc cc 00 00 41 57 41 56
RSP: 0018:ffffc900032a7a60 EFLAGS: 00010246
RAX: 490f7b51c3dbc900 RBX: ffffffff8dc2b720 RCX: ffff888079bb8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffff52000654edd
R10: fffff52000654edd R11: 1ffff92000654edc R12: ffff88802e7c7038
R13: ffffffff8dc2b670 R14: 0000000000000000 R15: dffffc0000000000
FS:  000055558030a500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e363fff CR3: 000000002398d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 comedi_device_detach_locked+0x16e/0x710 drivers/comedi/drivers.c:206
 comedi_device_detach drivers/comedi/drivers.c:214 [inline]
 comedi_device_attach+0x5c9/0x700 drivers/comedi/drivers.c:1010
 do_devconfig_ioctl drivers/comedi/comedi_fops.c:868 [inline]
 comedi_unlocked_ioctl+0x5a6/0x1050 drivers/comedi/comedi_fops.c:2173
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f23f178efc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc115b81e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f23f19e5fa0 RCX: 00007f23f178efc9
RDX: 00002000000000c0 RSI: 0000000040946400 RDI: 0000000000000003
RBP: 00007f23f1811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f23f19e5fa0 R14: 00007f23f19e5fa0 R15: 0000000000000003
 </TASK>

Crashes (88):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/10/29 01:11 linux-6.1.y 8e6e2188d949 fd2207e7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/07/20 16:13 linux-6.1.y 3369c6df2fae 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/07/20 15:51 linux-6.1.y 3369c6df2fae 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/17 12:46 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/16 00:01 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/14 11:37 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/11 05:36 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/10 16:48 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/07 21:29 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/05 07:30 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/04 14:53 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/03 01:22 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/12/01 20:50 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/11/30 02:37 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/11/29 14:17 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/11/28 20:49 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/11/11 07:48 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/11/04 17:18 linux-6.1.y f6e38ae624cf 686bf657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/11/04 10:19 linux-6.1.y f6e38ae624cf 686bf657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/10/29 00:47 linux-6.1.y 8e6e2188d949 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/10/29 00:47 linux-6.1.y 8e6e2188d949 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/10/27 23:20 linux-6.1.y 8e6e2188d949 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/10/26 19:14 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/10/26 12:09 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/10/23 17:11 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/10/12 14:56 linux-6.1.y 882efbdd9d34 ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/10/12 04:52 linux-6.1.y 882efbdd9d34 ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/10/11 13:31 linux-6.1.y 882efbdd9d34 ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/29 10:45 linux-6.1.y 7b34dc04e4ff 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/28 01:44 linux-6.1.y 7b34dc04e4ff 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/23 07:16 linux-6.1.y 363a599da6d9 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/22 02:17 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/20 22:26 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/20 05:43 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/20 05:43 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/17 19:17 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/14 12:15 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/09/14 12:15 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/31 19:18 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/31 11:01 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/30 18:14 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/30 18:14 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/30 18:12 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/30 18:06 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/30 18:05 linux-6.1.y f89b6e15694c 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/26 17:22 linux-6.1.y 0bc96de781b4 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/26 01:30 linux-6.1.y 0bc96de781b4 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/08/26 01:27 linux-6.1.y 0bc96de781b4 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/07/27 14:33 linux-6.1.y 3594f306da12 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/07/20 15:31 linux-6.1.y 3369c6df2fae 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
2025/07/20 15:30 linux-6.1.y 3369c6df2fae 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in driver_unregister
* Struck through repros no longer work on HEAD.