WARNING in usb_stor_msg_common/usb_submit_urb

Status: upstream: reported on 2026/08/19 13:19
Reported-by: syzbot+22ea20ef3afb6785b122@syzkaller.appspotmail.com
First crash: 7d00h, last: 5d16h
Discussions (5)
Title Replies (including bot) Last reply
[PATCH v2] usb-storage: ene_ub6250: fix race between scan work and probe 2 (2) 2026/08/21 15:12
Re: [PATCH] usb-storage: ene_ub6250: serialize card type probe with scan work 1 (1) 2026/08/21 07:39
Re: [PATCH] usb-storage: ene_ub6250: serialize card type probe with scan work 1 (1) 2026/08/21 07:33
[PATCH] usb-storage: ene_ub6250: serialize card type probe with scan work 2 (2) 2026/08/21 05:58
[PATCH] usb-storage: prevent concurrent URB submission in usb_stor_msg_common 2 (2) 2026/08/20 14:25
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 WARNING in usb_stor_msg_common/usb_submit_urb origin:upstream -1 syz error 1 247d 247d 0/2 upstream: reported syz repro on 2025/12/22 11:12
linux-5.15 WARNING in usb_stor_msg_common/usb_submit_urb -1 syz 7 4d00h 4d09h 0/3 upstream: reported syz repro on 2026/08/22 04:14
upstream WARNING in usb_stor_msg_common/usb_submit_urb prio:high usb usb-storage -1 syz, C error 1421 6m 605d 0/29 upstream: reported C repro on 2024/12/29 09:01

Sample crash report:
------------[ cut here ]------------
URB ffff88802f6a1200 submitted while active
WARNING: CPU: 1 PID: 4734 at drivers/usb/core/urb.c:379 usb_submit_urb+0xfb8/0x18d0 drivers/usb/core/urb.c:379
Modules linked in:
CPU: 1 PID: 4734 Comm: kworker/1:14 Not tainted syzkaller #0
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+0xfb8/0x18d0 drivers/usb/core/urb.c:379
Code: 2e 8b 44 89 ea e8 29 6d fe 03 e9 bb fb ff ff e8 1e e4 56 fb c6 05 18 65 e1 07 01 48 c7 c7 a0 ec 2e 8b 48 89 de e8 68 6d 22 fb <0f> 0b e9 be f0 ff ff e8 fc e3 56 fb eb 1f e8 f5 e3 56 fb 44 8b 64
RSP: 0018:ffffc9000563f9d8 EFLAGS: 00010246
RAX: d84f070f8d7b8100 RBX: ffff88802f6a1200 RCX: ffff888054aa5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc9000563fb98 R08: ffffc9000563f667 R09: 1ffff92000ac7ecc
R10: dffffc0000000000 R11: fffff52000ac7ecd R12: 0000000000000c00
R13: ffff888029cf8ee0 R14: ffff88802f6a1208 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555581903a38 CR3: 000000005cfbb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 usb_stor_msg_common+0x29f/0x500 drivers/usb/storage/transport.c:143
 usb_stor_control_msg drivers/usb/storage/transport.c:205 [inline]
 usb_stor_Bulk_max_lun+0x2f9/0x5b0 drivers/usb/storage/transport.c:1081
 usb_stor_scan_dwork+0xf0/0x260 drivers/usb/storage/usb.c:906
 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/20 21:47 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in usb_stor_msg_common/usb_submit_urb
2026/08/20 01:05 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in usb_stor_msg_common/usb_submit_urb
2026/08/19 13:18 linux-6.1.y e4f7d8be268e 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in usb_stor_msg_common/usb_submit_urb
* Struck through repros no longer work on HEAD.