syzbot
WARNING: kobject bug in __scsi_remove_device
Status:
upstream: reported syz repro on 2026/08/19 13:20
Reported-by: syzbot+ff3faca52f5248438a14@syzkaller.appspotmail.com
First crash: 60d, last: 5d17h
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Bug presence (1)
| Date |
Name |
Commit |
Repro |
Result |
| 2026/09/20 |
upstream (ToT) |
[unknown] |
syz
|
Failed due to an error; will retry later
|
Sample crash report:
------------[ cut here ]------------
kobject: '(null)' (ffff8880314c8740): is not initialized, yet kobject_put() is being called.
WARNING: CPU: 1 PID: 5933 at lib/kobject.c:736 kobject_put+0x90/0x450 lib/kobject.c:734
Modules linked in:
CPU: 1 PID: 5933 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:kobject_put+0x90/0x450 lib/kobject.c:734
Code: 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 c2 a0 61 f7 48 8b 33 48 c7 c7 c0 0c eb 8b 48 89 da e8 20 7e d2 f6 <0f> 0b eb 05 e8 77 bf 08 f7 4c 8d 73 38 4c 89 f7 be 04 00 00 00 e8
RSP: 0018:ffffc9000458f560 EFLAGS: 00010246
RAX: 0201d3c2acfbbe00 RBX: ffff8880314c8740 RCX: ffff88802ccf8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffffc9000458f167 R09: 1ffff920008b1e2c
R10: dffffc0000000000 R11: fffff520008b1e2d R12: 1ffff110062990ef
R13: dffffc0000000000 R14: ffff8880314c877c R15: 0000000000000200
FS: 00007f0f1645e6c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa9b25535c0 CR3: 0000000079495000 CR4: 00000000003506e0
Call Trace:
<TASK>
__scsi_remove_device+0xcc/0x390 drivers/scsi/scsi_sysfs.c:1491
scsi_alloc_sdev+0x908/0xab0 drivers/scsi/scsi_scan.c:379
scsi_probe_and_add_lun+0x1bb/0x45f0 drivers/scsi/scsi_scan.c:1186
__scsi_scan_target+0x1bc/0x1090 drivers/scsi/scsi_scan.c:1716
scsi_scan_channel drivers/scsi/scsi_scan.c:1812 [inline]
scsi_scan_host_selected+0x50f/0x6a0 drivers/scsi/scsi_scan.c:1844
scsi_scan drivers/scsi/scsi_sysfs.c:151 [inline]
store_scan+0x4a0/0x530 drivers/scsi/scsi_sysfs.c:191
kernfs_fop_write_iter+0x3a4/0x520 fs/kernfs/file.c:352
call_write_iter include/linux/fs.h:2018 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x474/0x9a0 fs/read_write.c:584
ksys_write+0x151/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0f1559e1d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0f1645e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0f15825fa0 RCX: 00007f0f1559e1d9
RDX: 0000000000000005 RSI: 0000200000000380 RDI: 0000000000000003
RBP: 00007f0f15635888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0f15826038 R14: 00007f0f15825fa0 R15: 00007ffe31cc8188
</TASK>
* Struck through repros no longer work on HEAD.