bisecting fixing commit since 2760370b164918bd9311e6bf445cf4c118d3463c
building syzkaller on 282f03fbbd76ae15c1ed5e934873fbbc47735176
testing commit 2760370b164918bd9311e6bf445cf4c118d3463c
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: bd710cc77373bc39f75cbc016d4120f188e678dbba1f0ffb82f51a86f56caf8f
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 4ba8e26127c393c32776dff6d79c5b82de6dc542
testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4cec4897f12c6881c8f2394409d1e3f6233fb52888c347d6fc1bb724491cf3e9
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m59.866339127s (build: 16m10.092613425s, test: 6m18.53612653s)
the crash still happens on HEAD
commit msg: Linux 4.14.262
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 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
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout