------------[ cut here ]------------
add_uevent_var: buffer size too small
WARNING: CPU: 0 PID: 10271 at lib/kobject_uevent.c:671 add_uevent_var+0x2f4/0x390 lib/kobject_uevent.c:671
Modules linked in:

CPU: 0 PID: 10271 Comm: kworker/0:9 Not tainted 5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event

RIP: 0010:add_uevent_var+0x2f4/0x390 lib/kobject_uevent.c:671
Code: e9 3e fe ff ff 48 c7 c7 20 ac 01 89 e8 95 67 80 04 0f 0b 41 b8 f4 ff ff ff e9 31 ff ff ff 48 c7 c7 c0 ac 01 89 e8 7c 67 80 04 <0f> 0b 41 b8 f4 ff ff ff e9 18 ff ff ff 4c 89 f6 48 c7 c7 e0 d3 22
RSP: 0018:ffffc9000b5ff308 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88802a4aa000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff88fec2e0 RDI: fffff520016bfe53
RBP: ffffc9000b5ff3f8 R08: 0000000000000001 R09: ffff8880b9e2ff47
R10: ffffed10173c5fe8 R11: 000000005f646461 R12: 1ffff920016bfe64
R13: ffff88802a4aaa1c R14: 00000000000007de R15: 00000000000007de
FS:  0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b0fd7a000 CR3: 000000001c19d000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kobject_uevent_env+0xacc/0x1290 lib/kobject_uevent.c:605
 device_del+0x714/0xc10 drivers/base/core.c:3550
 input_unregister_device+0x7f/0xb0 drivers/input/input.c:2379
 hidinput_disconnect+0x13d/0x3d0 drivers/hid/hid-input.c:2040
 hid_disconnect+0xe4/0x150 drivers/hid/hid-core.c:2032
 hid_hw_stop+0xa/0x70 drivers/hid/hid-core.c:2079
 ms_remove+0xd/0x80 drivers/hid/hid-microsoft.c:409
 hid_device_remove+0xac/0x1c0 drivers/hid/hid-core.c:2316
 __device_release_driver+0x32f/0x660 drivers/base/dd.c:1201
 device_release_driver_internal drivers/base/dd.c:1232 [inline]
 device_release_driver+0x21/0x30 drivers/base/dd.c:1255
 bus_remove_device+0x295/0x550 drivers/base/bus.c:529
 device_del+0x494/0xc10 drivers/base/core.c:3540
 hid_remove_device drivers/hid/hid-core.c:2487 [inline]
 hid_destroy_device+0xba/0x120 drivers/hid/hid-core.c:2506
 usbhid_disconnect+0x95/0xc0 drivers/hid/usbhid/hid-core.c:1444
 usb_unbind_interface+0x183/0x7e0 drivers/usb/core/driver.c:458
 __device_release_driver+0x32f/0x660 drivers/base/dd.c:1201
 device_release_driver_internal drivers/base/dd.c:1232 [inline]
 device_release_driver+0x21/0x30 drivers/base/dd.c:1255
 bus_remove_device+0x295/0x550 drivers/base/bus.c:529
 device_del+0x494/0xc10 drivers/base/core.c:3540
 usb_disable_device+0x29c/0x660 drivers/usb/core/message.c:1419
 usb_disconnect.cold+0x209/0x67e drivers/usb/core/hub.c:2221
 hub_port_connect drivers/usb/core/hub.c:5151 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5440 [inline]
 port_event drivers/usb/core/hub.c:5586 [inline]
 hub_event+0xb22/0x36c0 drivers/usb/core/hub.c:5668
 process_one_work+0x84c/0x13d0 kernel/workqueue.c:2276