bisecting fixing commit since 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
building syzkaller on d018dd31bfa66650daec4d49dc7b264a827e7834
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 9fd6a39fb9b54df13c17207356faa22b554dbcd2a65fdd2c9a6629f8c06fe91b
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 1048779a1d7dcf0b5c150188decafa21c19821e4
testing commit 1048779a1d7dcf0b5c150188decafa21c19821e4
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: e5e0df84b9ef9a7d23c0918051bdbaae9f888671cecdcb6db206f000920041a7
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m9.036333662s (build: 19m0.713255923s, test: 6m21.155332742s)
the crash still happens on HEAD
commit msg: Linux 4.14.287
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout