WARNING in service_outstanding_interrupt/usb_submit_urb (2)

Status: upstream: reported on 2026/09/11 20:12
Subsystems: usb
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+eb8f169da355a394fe04@syzkaller.appspotmail.com
First crash: 4d01h, last: 4d01h
✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
5fcff94d repro-c 🏃 WARNING in service_outstanding_interrupt/usb_submit_urb (2) 2026/09/11 21:27 2026/09/11 21:27 6816f32e
954fcd69 assessment-security DenialOfService: ✅ Exploitable: ✅ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in service_outstanding_interrupt/usb_submit_urb (2) 2026/09/09 02:16 2026/09/09 02:16 2026/09/09 02:46 243b72f1
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [usb?] WARNING in service_outstanding_interrupt/usb_submit_urb (2) 0 (1) 2026/09/11 20:12
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in service_outstanding_interrupt/usb_submit_urb usb -1 1 1674d 1670d 0/29 auto-closed as invalid on 2022/06/10 00:32

Sample crash report:
------------[ cut here ]------------
URB ffff888112540000 submitted while active
WARNING: drivers/usb/core/urb.c:379 at usb_submit_urb+0x1689/0x19b0 drivers/usb/core/urb.c:379, CPU#0: syz.0.163/5871
Modules linked in:
CPU: 0 UID: 0 PID: 5871 Comm: syz.0.163 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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 be 79 b2 fc 48 8d 3d d7 b6 19 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:ffffc90013e2fb50 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888112540000 RCX: 0000000000000000
RDX: ffff888112d28000 RSI: ffff888112540000 RDI: ffffffff8b1c35d0
RBP: ffff88810ffb5090 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88810ffb52b8 R14: ffff88810ffb5050 R15: ffff88810ffb5050
FS:  00007f59984c56c0(0000) GS:ffff8882683e4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2d13ca CR3: 00000001149e4000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 service_outstanding_interrupt.isra.0+0x166/0x270 drivers/usb/class/cdc-wdm.c:509
 wdm_read+0x8a8/0xaf0 drivers/usb/class/cdc-wdm.c:615
 vfs_read+0x1e4/0xb40 fs/read_write.c:572
 ksys_read+0x12a/0x250 fs/read_write.c:716
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x119/0x710 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5999aae159
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:00007f59984c5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f5999d36180 RCX: 00007f5999aae159
RDX: 00000000000000b3 RSI: 0000200000000340 RDI: 000000000000001e
RBP: 00007f5999b45024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5999d36218 R14: 00007f5999d36180 R15: 00007ffc3efb3688
 </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 be 79 b2 fc       	call   0xfcb279de
  20:	48 8d 3d d7 b6 19 06 	lea    0x619b6d7(%rip),%rdi        # 0x619b6fe
  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)

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/07 20:02 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 34c9c5517033 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in service_outstanding_interrupt/usb_submit_urb
* Struck through repros no longer work on HEAD.