syzbot
WARNING in cx231xx_send_vendor_cmd/usb_submit_urb
Status:
upstream: reported C repro on 2026/08/30 14:52
Subsystems:
usb
Labels:
prio:low
[Documentation on labels]
Reported-by: syzbot+ddccc0c0dbc0a38ffccb@syzkaller.appspotmail.com
First crash: 1d06h, last: 1d02h
Sample crash report:
------------[ cut here ]------------
usb 5-1: BOGUS control dir, pipe 80000380 doesn't match bRequestType c0
WARNING: drivers/usb/core/urb.c:413 at usb_submit_urb+0x1057/0x18b0 drivers/usb/core/urb.c:411, CPU#0: syz-executor398/5632
Modules linked in:
CPU: 0 UID: 0 PID: 5632 Comm: syz-executor398 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:usb_submit_urb+0x1100/0x18b0 drivers/usb/core/urb.c:411
Code: b8 00 00 00 00 00 fc ff df 41 0f b6 04 04 84 c0 0f 85 b2 05 00 00 45 0f b6 45 00 48 8b 3c 24 48 8b 74 24 18 4c 89 f2 44 89 f9 <67> 48 0f b9 3a 48 bd 00 00 00 00 00 fc ff df e9 ba f2 ff ff 44 89
RSP: 0018:ffffc900039c74f8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888026846b00 RCX: 0000000080000380
RDX: ffff8880222bc7a0 RSI: ffffffff8cc51500 RDI: ffffffff9087c3c0
RBP: dffffc0000000000 R08: 00000000000000c0 R09: 0000000000000000
R10: ffffc900039c75e0 R11: fffff52000738ec8 R12: 1ffff110045d11c8
R13: ffff888022e88e40 R14: ffff8880222bc7a0 R15: 0000000080000380
FS: 0000555560163400(0000) GS:ffff888124cdc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8c364f50f5 CR3: 000000007124e000 CR4: 00000000003526f0
Call Trace:
<TASK>
usb_start_wait_urb+0x13f/0x5b0 drivers/usb/core/message.c:62
usb_internal_control_msg drivers/usb/core/message.c:117 [inline]
usb_control_msg+0x234/0x3e0 drivers/usb/core/message.c:167
__usb_control_msg+0xf9/0x3f0 drivers/media/usb/cx231xx/cx231xx-core.c:249
cx231xx_send_vendor_cmd+0x553/0x760 drivers/media/usb/cx231xx/cx231xx-core.c:-1
cx231xx_send_usb_command+0x2e2/0x500 drivers/media/usb/cx231xx/cx231xx-core.c:205
cx231xx_i2c_recv_bytes drivers/media/usb/cx231xx/cx231xx-i2c.c:-1 [inline]
cx231xx_i2c_xfer+0xd60/0x2a90 drivers/media/usb/cx231xx/cx231xx-i2c.c:386
__i2c_transfer+0x7bf/0x1fe0 drivers/i2c/i2c-core-base.c:-1
i2c_transfer+0x1cb/0x2d0 drivers/i2c/i2c-core-base.c:2344
i2c_transfer_buffer_flags+0x10d/0x1a0 drivers/i2c/i2c-core-base.c:2372
i2c_master_recv include/linux/i2c.h:79 [inline]
i2cdev_read+0x10d/0x250 drivers/i2c/i2c-dev.c:155
vfs_read+0x213/0xa80 fs/read_write.c:572
ksys_read+0x150/0x270 fs/read_write.c:716
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f08f411d339
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd7bfb4838 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f08f411d339
RDX: 0000000000000700 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000009
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd7bfb49b8
R13: 0000000000000002 R14: 00007ffd7bfb4860 R15: 00007ffd7bfb4850
</TASK>
----------------
Code disassembly (best guess):
0: b8 00 00 00 00 mov $0x0,%eax
5: 00 fc add %bh,%ah
7: ff lcall (bad)
8: df 41 0f filds 0xf(%rcx)
b: b6 04 mov $0x4,%dh
d: 04 84 add $0x84,%al
f: c0 0f 85 rorb $0x85,(%rdi)
12: b2 05 mov $0x5,%dl
14: 00 00 add %al,(%rax)
16: 45 0f b6 45 00 movzbl 0x0(%r13),%r8d
1b: 48 8b 3c 24 mov (%rsp),%rdi
1f: 48 8b 74 24 18 mov 0x18(%rsp),%rsi
24: 4c 89 f2 mov %r14,%rdx
27: 44 89 f9 mov %r15d,%ecx
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp
36: fc ff df
39: e9 ba f2 ff ff jmp 0xfffff2f8
3e: 44 rex.R
3f: 89 .byte 0x89
* Struck through repros no longer work on HEAD.