From: syzbot <syzbot+eb8f169da355a394fe04@syzkaller.appspotmail.com>
To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: [syzbot] [usb?] WARNING in service_outstanding_interrupt/usb_submit_urb (2)
Date: Fri, 11 Sep 2026 13:12:34 -0700 [thread overview]
Message-ID: <6aa460b2.6e6c5f9e.28f11f.0049.GAE@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 34c9c5517033 Merge 7.3-rc2 into usb-next
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=101ceaf9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=c451f9f64434b622
dashboard link: https://syzkaller.appspot.com/bug?extid=eb8f169da355a394fe04
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8a384e63cde6/disk-34c9c551.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e5a73decdc30/vmlinux-34c9c551.xz
kernel image: https://storage.googleapis.com/syzbot-assets/13abc163bbdc/bzImage-34c9c551.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+eb8f169da355a394fe04@syzkaller.appspotmail.com
------------[ 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)
---
This report is generated by a bot. It may contain errors.
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reply other threads:[~2026-09-11 20:12 UTC|newest]
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