syzbot
WARNING in usb_stor_scan_dwork/usb_submit_urb
Status:
upstream: reported on 2026/08/25 05:13
Subsystems:
usb-storage
Labels:
prio:low
[Documentation on labels]
Reported-by: syzbot+50c258b43e6a020d124f@syzkaller.appspotmail.com
First crash: 7d02h, last: 7d02h
Sample crash report:
------------[ cut here ]------------
URB ffff888103ab5d00 submitted while active
WARNING: drivers/usb/core/urb.c:379 at usb_submit_urb+0x1689/0x19b0 drivers/usb/core/urb.c:379, CPU#0: kworker/0:4/5231
Modules linked in:
CPU: 0 UID: 0 PID: 5231 Comm: kworker/0:4 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events_freezable usb_stor_scan_dwork
RIP: 0010:usb_submit_urb+0x168c/0x19b0 drivers/usb/core/urb.c:379
Code: 00 48 8b 04 24 48 8b 90 b0 00 00 00 e9 70 ff ff ff bb ed ff ff ff e9 ac f1 ff ff e8 ce 9a ba fc 48 8d 3d 67 f4 00 06 48 89 de <67> 48 0f b9 3a bb f0 ff ff ff e9 8e f1 ff ff c7 44 24 30 00 00 00
RSP: 0018:ffffc90002dafa48 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888103ab5d00 RCX: dffffc0000000000
RDX: ffff888119261e00 RSI: ffff888103ab5d00 RDI: ffffffff8afa6e20
RBP: 1ffff920005b5f5c R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88813cc60fb0
R13: ffff88813cc60f28 R14: ffffc90002dafb00 R15: ffff888103ab5d00
FS: 0000000000000000(0000) GS:ffff888268633000(0000) knlGS:0000000000000000
Call Trace:
<TASK>
usb_stor_scan_dwork+0x1e6/0x2c0 drivers/usb/storage/usb.c:988
process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
process_scheduled_works kernel/workqueue.c:3405 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
----------------
Code disassembly (best guess):
0: 00 48 8b add %cl,-0x75(%rax)
3: 04 24 add $0x24,%al
5: 48 8b 90 b0 00 00 00 mov 0xb0(%rax),%rdx
c: e9 70 ff ff ff jmp 0xffffff81
11: bb ed ff ff ff mov $0xffffffed,%ebx
16: e9 ac f1 ff ff jmp 0xfffff1c7
1b: e8 ce 9a ba fc call 0xfcba9aee
20: 48 8d 3d 67 f4 00 06 lea 0x600f467(%rip),%rdi # 0x600f48e
27: 48 89 de mov %rbx,%rsi
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: bb f0 ff ff ff mov $0xfffffff0,%ebx
34: e9 8e f1 ff ff jmp 0xfffff1c7
39: c7 .byte 0xc7
3a: 44 24 30 rex.R and $0x30,%al
3d: 00 00 add %al,(%rax)
* Struck through repros no longer work on HEAD.