syzbot


WARNING in driver_unregister

Status: upstream: reported C repro on 2025/07/08 23:37
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+77b35f0c016a096ea793@syzkaller.appspotmail.com
First crash: 160d, last: 1d14h
Bug presence (1)
Date Name Commit Repro Result
2025/07/10 upstream (ToT) 8c2e52ebbe88 C [report] WARNING in driver_unregister
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in driver_unregister input usb -1 C 1 1302d 1298d 22/29 fixed on 2023/02/24 13:50
linux-6.1 WARNING in driver_unregister origin:upstream -1 C 86 1h22m 148d 0/3 upstream: reported C repro on 2025/07/20 15:31
upstream WARNING in driver_unregister (2) kernel -1 C error 3214 8d12h 163d 23/29 upstream: reported C repro on 2025/07/05 03:20
linux-6.6 WARNING in driver_unregister origin:upstream missing-backport -1 C 85 1h49m 147d 0/2 upstream: reported C repro on 2025/07/21 03:57

Sample crash report:
comedi comedi0: c6xdigio: I/O port conflict (0x7,3)
------------[ cut here ]------------
Unexpected driver unregister!
WARNING: CPU: 0 PID: 4399 at drivers/base/driver.c:263 driver_unregister+0x8e/0xa0 drivers/base/driver.c:263
Modules linked in:
CPU: 0 PID: 4399 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:263
Code: e8 37 22 22 fd 48 89 df 5b 41 5e 41 5f e9 ea 63 ff ff e8 c5 87 ae fc eb 05 e8 be 87 ae fc 48 c7 c7 80 85 7b 8a e8 12 45 d5 04 <0f> 0b 5b 41 5e 41 5f c3 00 00 cc cc 00 00 cc cc 00 00 41 57 41 56
RSP: 0018:ffffc900010ffa60 EFLAGS: 00010246
RAX: ae0615b286548d00 RBX: ffffffff8d12c600 RCX: ffff88807c31bb80
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffed10172067b0
R10: ffffed10172067b0 R11: 1ffff110172067af R12: ffff88814c6c1838
R13: ffffffff8d12c550 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000555559dae500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055deedf9f950 CR3: 0000000022d35000 CR4: 00000000003506f0
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:207
 comedi_device_detach drivers/comedi/drivers.c:215 [inline]
 comedi_device_attach+0x5c9/0x700 drivers/comedi/drivers.c:1011
 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:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1d246ddfc9
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:00007ffdb0515068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1d24934fa0 RCX: 00007f1d246ddfc9
RDX: 00002000000000c0 RSI: 0000000040946400 RDI: 0000000000000003
RBP: 00007f1d24760f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d24934fa0 R14: 00007f1d24934fa0 R15: 0000000000000003
 </TASK>

Crashes (106):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/10/23 10:57 linux-5.15.y ac56c046adf4 c0460fcd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/07/09 04:16 linux-5.15.y 3dea0e7f549e 4d9fdfa4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/12/14 10:49 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/12/11 05:00 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/12/10 17:13 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/12/06 20:03 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/12/05 07:30 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/12/02 19:03 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/12/02 07:39 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/30 19:13 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/29 13:45 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/28 20:48 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/28 18:03 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/26 01:50 linux-5.15.y cc5ec8769306 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/22 14:37 linux-5.15.y cc5ec8769306 4fb8ef37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/10 01:53 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/08 07:07 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/05 19:03 linux-5.15.y cc5ec8769306 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/05 19:01 linux-5.15.y cc5ec8769306 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/04 13:53 linux-5.15.y cc5ec8769306 686bf657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/04 09:04 linux-5.15.y cc5ec8769306 686bf657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/11/03 03:53 linux-5.15.y cc5ec8769306 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/29 01:13 linux-5.15.y ac56c046adf4 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/27 22:10 linux-5.15.y ac56c046adf4 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/26 19:16 linux-5.15.y ac56c046adf4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/23 10:35 linux-5.15.y ac56c046adf4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/22 15:52 linux-5.15.y ac56c046adf4 252fbbad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/12 14:03 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/12 05:41 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/11 18:29 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/03 01:10 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/10/02 16:12 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/29 10:51 linux-5.15.y 43bb85222e53 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/23 09:27 linux-5.15.y 43bb85222e53 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/16 23:47 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/16 12:52 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/14 11:41 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/13 13:39 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/11 20:36 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/11 18:14 linux-5.15.y 43bb85222e53 fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/09 19:31 linux-5.15.y de9476bb4f1b d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/09 19:31 linux-5.15.y de9476bb4f1b d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/08 15:16 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/07 10:56 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/07 02:18 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/03 20:46 linux-5.15.y 01879f56bdde 96a211bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/09/03 03:12 linux-5.15.y 01879f56bdde 96a211bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
2025/07/08 23:36 linux-5.15.y 3dea0e7f549e 4d9fdfa4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in driver_unregister
* Struck through repros no longer work on HEAD.