bisecting fixing commit since 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85
building syzkaller on 1ba81399e2d03b53a7e631c4ab05f25af1fb1911
testing commit 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 443834e6ee68b0b56d8b32b623063acccd9928408d0a74e29818e666eb76f3ac
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD f6b016a9d961296d2db609d0259654371625e22e
testing commit f6b016a9d961296d2db609d0259654371625e22e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 28c99cf2f23dfa00bd52326a3486b2559212d5d7d1fe78d69525dd755eb7c581
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m2.47222104s (build: 22m30.364321373s, test: 6m53.878669912s)
the crash still happens on HEAD
commit msg: Linux 4.14.251
crash: unregister_netdevice: waiting for DEV to become free
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout