bisecting fixing commit since 4ba8e26127c393c32776dff6d79c5b82de6dc542
building syzkaller on 214351e168def9426c79e1f65a93ddb112cee906
testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2aee06f4e06294cc31564c45ae592b1d150477cc5f91e26fb86775fe6c9d80a2
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
testing commit 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 26cad63fd8415631ead580f93a5f38a4ba48c31865be611fc1c00877af39b1a7
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m54.321761217s (build: 16m0.614696397s, test: 6m19.371593462s)
the crash still happens on HEAD
commit msg: Linux 4.14.276
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout