[v5.15] WARNING in cm109_input_open/usb_submit_urb (2)

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syzbot

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Apr 20, 2025, 9:41:34 PM4/20/25
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Hello,

syzbot found the following issue on:

HEAD commit: f7347f400572 Linux 5.15.180
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=111eb204580000
kernel config: https://syzkaller.appspot.com/x/.config?x=346c19688de58d89
dashboard link: https://syzkaller.appspot.com/bug?extid=6d5625d412e75b926ab9
compiler: Debian clang version 15.0.6, Debian LLD 15.0.6

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2685682aa24a/disk-f7347f40.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f01e2fad1237/vmlinux-f7347f40.xz
kernel image: https://storage.googleapis.com/syzbot-assets/cbcd92b62b9a/bzImage-f7347f40.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6d5625...@syzkaller.appspotmail.com

cm109 5-1:0.8: invalid payload size 0, expected 4
input: CM109 USB driver as /devices/platform/dummy_hcd.4/usb5/5-1/5-1:0.8/input/input9
------------[ cut here ]------------
URB ffff888067760100 submitted while active
WARNING: CPU: 1 PID: 4214 at drivers/usb/core/urb.c:378 usb_submit_urb+0x10b1/0x1990 drivers/usb/core/urb.c:378
Modules linked in:
CPU: 1 PID: 4214 Comm: kworker/1:6 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:usb_submit_urb+0x10b1/0x1990 drivers/usb/core/urb.c:378
Code: 2b 54 fb eb 4d e8 ef 2b 54 fb e9 fc ef ff ff e8 e5 2b 54 fb c6 05 cc f4 ca 07 01 48 c7 c7 60 c6 44 8b 4c 89 ee e8 9f ea 1f fb <0f> 0b e9 c7 ef ff ff e8 c3 2b 54 fb eb 1a e8 bc 2b 54 fb eb 13 e8
RSP: 0018:ffffc9000309ebd8 EFLAGS: 00010246
RAX: 6babb903f224a200 RBX: ffff888067b3b048 RCX: 0000000000100000
RDX: ffffc90012d59000 RSI: 0000000000033b12 RDI: 0000000000033b13
RBP: ffff888067760108 R08: ffffffff8166728c R09: ffffed10171e4f24
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888067760100 R14: 0000000000000cc0 R15: ffff888067b3b010
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003000 CR3: 0000000065aea000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
cm109_input_open+0x1f5/0x460 drivers/input/misc/cm109.c:572
input_open_device+0x188/0x2d0 drivers/input/input.c:640
kbd_connect+0xe5/0x120 drivers/tty/vt/keyboard.c:1581
input_attach_handler drivers/input/input.c:1046 [inline]
input_register_device+0xdae/0x1150 drivers/input/input.c:2429
cm109_usb_probe+0x10bb/0x15f0 drivers/input/misc/cm109.c:806
usb_probe_interface+0x5c0/0xaf0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x24e/0xb60 drivers/base/dd.c:595
__driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:755
driver_probe_device+0x50/0x420 drivers/base/dd.c:785
__device_attach_driver+0x2b9/0x500 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
__device_attach+0x359/0x570 drivers/base/dd.c:979
bus_probe_device+0xba/0x1e0 drivers/base/bus.c:489
device_add+0xb48/0xfd0 drivers/base/core.c:3412
usb_set_configuration+0x19dd/0x2020 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x84/0x140 drivers/usb/core/generic.c:238
usb_probe_device+0x130/0x260 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x24e/0xb60 drivers/base/dd.c:595
__driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:755
driver_probe_device+0x50/0x420 drivers/base/dd.c:785
__device_attach_driver+0x2b9/0x500 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:429
__device_attach+0x359/0x570 drivers/base/dd.c:979
bus_probe_device+0xba/0x1e0 drivers/base/bus.c:489
device_add+0xb48/0xfd0 drivers/base/core.c:3412
usb_new_device+0xc21/0x18f0 drivers/usb/core/hub.c:2604
hub_port_connect drivers/usb/core/hub.c:5467 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5607 [inline]
port_event drivers/usb/core/hub.c:5753 [inline]
hub_event+0x2cdf/0x54c0 drivers/usb/core/hub.c:5835
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>


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syzbot

unread,
Oct 1, 2025, 6:39:18 PM10/1/25
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
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