bisecting fixing commit since 4010a528219e01dd02e768b22168f7f0e78365ce
building syzkaller on 9a4781d43abfb86fe8521cb6fb084519e237454c
testing commit 4010a528219e01dd02e768b22168f7f0e78365ce
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 030d6b6724621dc857b1d0db70c6342e74649bae266c754ace8ec11300ea81cf
run #0: crashed: BUG: sleeping function called from invalid context in lock_sock_nested
run #1: crashed: WARNING in input_unregister_device
run #2: crashed: WARNING in input_unregister_device
run #3: crashed: WARNING in input_unregister_device
run #4: crashed: WARNING in input_unregister_device
run #5: crashed: WARNING in input_unregister_device
run #6: crashed: WARNING in input_unregister_device
run #7: crashed: WARNING in input_unregister_device
run #8: crashed: WARNING in input_unregister_device
run #9: crashed: WARNING in input_unregister_device
run #10: crashed: WARNING in input_unregister_device
run #11: crashed: WARNING in input_unregister_device
run #12: crashed: WARNING in input_unregister_device
run #13: crashed: WARNING in input_unregister_device
run #14: crashed: WARNING in input_unregister_device
run #15: crashed: WARNING in input_unregister_device
run #16: crashed: WARNING in input_unregister_device
run #17: crashed: WARNING in input_unregister_device
run #18: crashed: WARNING in input_unregister_device
run #19: crashed: WARNING in input_unregister_device
testing current HEAD c8c109546a19613d323a319d0c921cb1f317e629
testing commit c8c109546a19613d323a319d0c921cb1f317e629
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: b2d035a621b017824768db8affc471fd9c863e42da7de30e03b2c46fa042dd41
all runs: crashed: WARNING in input_unregister_device
revisions tested: 2, total time: 22m12.032472874s (build: 12m46.679063771s, test: 8m47.187781614s)
the crash still happens on HEAD
commit msg: Merge tag 'zstd-for-linus-v5.16' of git://github.com/terrelln/linux
crash: WARNING in input_unregister_device
usb 5-1: USB disconnect, device number 32
------------[ cut here ]------------
add_uevent_var: buffer size too small
WARNING: CPU: 0 PID: 9152 at lib/kobject_uevent.c:671 add_uevent_var+0x2f4/0x390 lib/kobject_uevent.c:671
Modules linked in:
CPU: 0 PID: 9152 Comm: kworker/0:7 Not tainted 5.15.0-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 40 f3 43 89 e8 fb 20 8a 04 0f 0b 41 b8 f4 ff ff ff e9 31 ff ff ff 48 c7 c7 e0 f3 43 89 e8 e2 20 8a 04 <0f> 0b 41 b8 f4 ff ff ff e9 18 ff ff ff 4c 89 f6 48 c7 c7 20 50 67
RSP: 0018:ffffc9000cb4f300 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88807445e000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52001969e52
RBP: ffffc9000cb4f3f0 R08: 0000000000000001 R09: ffff8880b9e27aab
R10: ffffed10173c4f55 R11: 000000005f646461 R12: 1ffff92001969e63
R13: ffff88807445ea1c R14: 00000000000007de R15: 00000000000007de
FS:  0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdfe87bfbd0 CR3: 0000000024920000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kobject_uevent_env+0xacc/0x1290 lib/kobject_uevent.c:605
 device_del+0x728/0xc20 drivers/base/core.c:3591
 input_unregister_device+0x7f/0xb0 drivers/input/input.c:2379
 hidinput_disconnect+0x13d/0x3d0 drivers/hid/hid-input.c:2039
 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:1203
 device_release_driver_internal drivers/base/dd.c:1236 [inline]
 device_release_driver+0x21/0x30 drivers/base/dd.c:1259
 bus_remove_device+0x295/0x550 drivers/base/bus.c:529
 device_del+0x494/0xc20 drivers/base/core.c:3581
 hid_remove_device drivers/hid/hid-core.c:2485 [inline]
 hid_destroy_device+0xba/0x120 drivers/hid/hid-core.c:2504
 usbhid_disconnect+0x95/0xc0 drivers/hid/usbhid/hid-core.c:1451
 usb_unbind_interface+0x183/0x7e0 drivers/usb/core/driver.c:458
 __device_release_driver+0x523/0x660 drivers/base/dd.c:1205
 device_release_driver_internal drivers/base/dd.c:1236 [inline]
 device_release_driver+0x21/0x30 drivers/base/dd.c:1259
 bus_remove_device+0x295/0x550 drivers/base/bus.c:529
 device_del+0x494/0xc20 drivers/base/core.c:3581
 usb_disable_device+0x29c/0x660 drivers/usb/core/message.c:1419
 usb_disconnect.cold+0x209/0x67e drivers/usb/core/hub.c:2225
 hub_port_connect drivers/usb/core/hub.c:5199 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5488 [inline]
 port_event drivers/usb/core/hub.c:5634 [inline]
 hub_event+0xb22/0x36c0 drivers/usb/core/hub.c:5716
 process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
 worker_thread+0x598/0x1040 kernel/workqueue.c:2445
 kthread+0x3ab/0x480 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>