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Date: Tue, 09 Jan 2024 10:22:23 -0800
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Subject: [syzbot] [kernel?] WARNING in input_unregister_device (2)
From: syzbot <syzbot+617f4ccb03b9869f6494@syzkaller.appspotmail.com>
To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, 
	linux-usb@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com
Content-Type: text/plain; charset="UTF-8"

Hello,

syzbot found the following issue on:

HEAD commit:    e7d3b9f28654 usb: yurex: Fix inconsistent locking bug in y..
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=1766e845e80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1dd225f9d04a5286
dashboard link: https://syzkaller.appspot.com/bug?extid=617f4ccb03b9869f6494
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5bf2bb53c85f/disk-e7d3b9f2.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5f6e5a287ee7/vmlinux-e7d3b9f2.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8259e694a7e3/bzImage-e7d3b9f2.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+617f4ccb03b9869f6494@syzkaller.appspotmail.com

------------[ cut here ]------------
add_uevent_var: buffer size too small
WARNING: CPU: 0 PID: 2442 at lib/kobject_uevent.c:671 add_uevent_var+0x32d/0x390 lib/kobject_uevent.c:671
Modules linked in:
CPU: 0 PID: 2442 Comm: kworker/0:6 Not tainted 6.7.0-rc5-syzkaller-ge7d3b9f28654 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: usb_hub_wq hub_event
RIP: 0010:add_uevent_var+0x32d/0x390 lib/kobject_uevent.c:671
Code: fb 48 c7 c7 c0 7c 4e 87 e8 50 63 d9 fa 0f 0b bb f4 ff ff ff e9 57 ff ff ff e8 0f 24 10 fb 48 c7 c7 60 7d 4e 87 e8 33 63 d9 fa <0f> 0b eb e1 4c 89 ee 48 c7 c7 a0 f5 22 89 e8 b0 d0 12 fc e9 b4 fe
RSP: 0018:ffffc90001daf2b8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888108b08000 RCX: ffffc9000c6ad000
RDX: 0000000000040000 RSI: ffffffff811733c6 RDI: 0000000000000001
RBP: ffffc90001daf3a8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 00000000006559c8 R12: 1ffff920003b5e5a
R13: 00000000000007f5 R14: ffff888108b08218 R15: 00000000000007f5
FS:  0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb1ddf92c98 CR3: 0000000104e44000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kobject_uevent_env+0x995/0x1800 lib/kobject_uevent.c:588
 device_del+0x642/0xa50 drivers/base/core.c:3832
 input_unregister_device+0xb9/0x100 drivers/input/input.c:2440
 hidinput_disconnect+0x160/0x3e0 drivers/hid/hid-input.c:2388
 hid_disconnect+0x143/0x1b0 drivers/hid/hid-core.c:2280
 hid_hw_stop+0x16/0x70 drivers/hid/hid-core.c:2329
 ms_remove+0x16/0xa0 drivers/hid/hid-microsoft.c:409
 hid_device_remove+0xce/0x250 drivers/hid/hid-core.c:2689
 device_remove+0xc8/0x170 drivers/base/dd.c:567
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1295
 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574
 device_del+0x39a/0xa50 drivers/base/core.c:3814
 hid_remove_device drivers/hid/hid-core.c:2867 [inline]
 hid_destroy_device+0xe5/0x150 drivers/hid/hid-core.c:2887
 usbhid_disconnect+0xa0/0xe0 drivers/hid/usbhid/hid-core.c:1456
 usb_unbind_interface+0x1dd/0x8d0 drivers/usb/core/driver.c:461
 device_remove drivers/base/dd.c:569 [inline]
 device_remove+0x11f/0x170 drivers/base/dd.c:561
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1295
 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574
 device_del+0x39a/0xa50 drivers/base/core.c:3814
 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1416
 usb_disconnect+0x2e1/0x910 drivers/usb/core/hub.c:2257
 hub_port_connect drivers/usb/core/hub.c:5305 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5605 [inline]
 port_event drivers/usb/core/hub.c:5765 [inline]
 hub_event+0x1be0/0x4f40 drivers/usb/core/hub.c:5847
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2627
 process_scheduled_works kernel/workqueue.c:2700 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>


---
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