syzbot


WARNING in usb_stor_msg_common

Status: upstream: reported syz repro on 2025/12/08 08:47
Subsystems: usb-storage
[Documentation on labels]
Reported-by: syzbot+4e26f67fa7f5bb2dafcc@syzkaller.appspotmail.com
First crash: 51d, last: 42d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [usb-storage?] WARNING in usb_stor_msg_common 0 (1) 2025/12/08 08:47
Last patch testing requests (2)
Created Duration User Patch Repo Result
2025/12/28 01:37 1h36m retest repro linux-next report log
2025/12/28 02:00 13m retest repro upstream report log

Sample crash report:
------------[ cut here ]------------
URB ffff888106a99b00 submitted while active
WARNING: drivers/usb/core/urb.c:380 at 0x0, CPU#1: usb-storage/6095
Modules linked in:
CPU: 1 UID: 0 PID: 6095 Comm: usb-storage Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:usb_submit_urb+0x15a3/0x1970 drivers/usb/core/urb.c:380
Code: 4b 03 00 00 48 8b 04 24 48 8b 90 b0 00 00 00 eb 91 bb ed ff ff ff e9 07 f3 ff ff e8 b7 19 a9 fa 48 8d 3d a0 73 7e 09 48 89 de <67> 48 0f b9 3a bb f0 ff ff ff e9 e9 f2 ff ff e8 99 19 a9 fa 0f 1f
RSP: 0018:ffffc90003aff670 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888106a99b00 RCX: dffffc0000000000
RDX: ffff888029d74980 RSI: ffff888106a99b00 RDI: ffffffff90943db0
RBP: 1ffff9200075fee1 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000002ba1 R12: ffff888039800ee8
R13: ffff888039800e60 R14: ffffc90003aff728 R15: ffff888106a99b00
FS:  0000000000000000(0000) GS:ffff8880d69fa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564726f21168 CR3: 0000000039502000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 usb_stor_msg_common+0x23f/0x560 drivers/usb/storage/transport.c:143
 usb_stor_bulk_transfer_buf+0x17c/0x410 drivers/usb/storage/transport.c:395
 ene_send_scsi_cmd+0x130/0x610 drivers/usb/storage/ene_ub6250.c:502
 ene_init drivers/usb/storage/ene_ub6250.c:2197 [inline]
 ene_transport+0x13fd/0x37f0 drivers/usb/storage/ene_ub6250.c:2310
 usb_stor_invoke_transport+0xee/0x1570 drivers/usb/storage/transport.c:611
 usb_stor_control_thread+0x5eb/0xb00 drivers/usb/storage/usb.c:462
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess):
   0:	4b 03 00             	rex.WXB add (%r8),%rax
   3:	00 48 8b             	add    %cl,-0x75(%rax)
   6:	04 24                	add    $0x24,%al
   8:	48 8b 90 b0 00 00 00 	mov    0xb0(%rax),%rdx
   f:	eb 91                	jmp    0xffffffa2
  11:	bb ed ff ff ff       	mov    $0xffffffed,%ebx
  16:	e9 07 f3 ff ff       	jmp    0xfffff322
  1b:	e8 b7 19 a9 fa       	call   0xfaa919d7
  20:	48 8d 3d a0 73 7e 09 	lea    0x97e73a0(%rip),%rdi        # 0x97e73c7
  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 e9 f2 ff ff       	jmp    0xfffff322
  39:	e8 99 19 a9 fa       	call   0xfaa919d7
  3e:	0f                   	.byte 0xf
  3f:	1f                   	(bad)

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/14 01:36 upstream 9d9c1cfec01c d1b870e1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in usb_stor_msg_common
2025/12/05 05:40 linux-next bc04acf4aeca d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in usb_stor_msg_common
* Struck through repros no longer work on HEAD.