[syzbot] [media?] WARNING in smsusb_stop_streaming

[syzbot] [media?] WARNING in smsusb_stop_streaming

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    2961f841b025 Merge tag 'turbostat-2026.02.14' of git://git..
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=17941ffa580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1ff39736314a9939
dashboard link: https://syzkaller.appspot.com/bug?extid=0d6ef2b7ceb6014d756c
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/aa34762dfd3f/disk-2961f841.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/52025d84f6c4/vmlinux-2961f841.xz
kernel image: https://storage.googleapis.com/syzbot-assets/66db8f0bf40c/bzImage-2961f841.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0d6ef2b7ceb6014d756c@syzkaller.appspotmail.com

------------[ cut here ]------------
data & WORK_STRUCT_PWQ
WARNING: kernel/workqueue.c:4304 at __flush_work+0xb75/0xcb0 kernel/workqueue.c:4304, CPU#0: kworker/0:6/5393
Modules linked in:
CPU: 0 UID: 0 PID: 5393 Comm: kworker/0:6 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: usb_hub_wq hub_event

RIP: 0010:__flush_work+0xb75/0xcb0 kernel/workqueue.c:4304
Code: 01 e8 3f a5 10 00 e9 bf fd ff ff 48 8b 7c 24 18 e8 c0 c1 97 00 e9 f7 f6 ff ff e8 b6 c1 97 00 e9 09 fa ff ff e8 3c 04 34 00 90 <0f> 0b 90 e9 38 fc ff ff e8 ce c1 97 00 e9 2d fb ff ff 48 89 df e8
RSP: 0018:ffffc90003856bc0 EFLAGS: 00010246
RAX: 0000000000100000 RBX: ffff8881000ba405 RCX: ffffc90011986000
RDX: 0000000000100000 RSI: ffffffff817db084 RDI: ffff88811df50000
RBP: 0000000000000004 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000004 R11: ffff8881f5739708 R12: ffffffff817da9da
R13: ffff88810006b400 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882686d3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fce04149d40 CR3: 0000000123490000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __cancel_work_sync kernel/workqueue.c:4447 [inline]
 cancel_work_sync+0xd1/0xf0 kernel/workqueue.c:4484
 smsusb_stop_streaming+0xaa/0x210 drivers/media/usb/siano/smsusb.c:183
 smsusb_term_device+0x8f/0x200 drivers/media/usb/siano/smsusb.c:345
 smsusb_init_device+0xb4e/0xbb0 drivers/media/usb/siano/smsusb.c:497
 smsusb_probe+0xd7f/0xe1f drivers/media/usb/siano/smsusb.c:575
 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:583 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:661
 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:803
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:833
 __device_attach_driver+0x1ff/0x3e0 drivers/base/dd.c:961
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1033
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1088
 bus_probe_device+0x64/0x160 drivers/base/bus.c:574
 device_add+0x11d9/0x1950 drivers/base/core.c:3689
 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:583 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:661
 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:803
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:833
 __device_attach_driver+0x1ff/0x3e0 drivers/base/dd.c:961
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1033
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1088
 bus_probe_device+0x64/0x160 drivers/base/bus.c:574
 device_add+0x11d9/0x1950 drivers/base/core.c:3689
 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953
 process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
 process_scheduled_works kernel/workqueue.c:3358 [inline]
 worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
 kthread+0x370/0x450 kernel/kthread.c:467
 ret_from_fork+0x6c3/0xcb0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>


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