bisecting fixing commit since 74766a973637a02c32c04c1c6496e114e4855239
building syzkaller on c6ff3e051f85ae554460141ba2ece6dbe9a36bb9
testing commit 74766a973637a02c32c04c1c6496e114e4855239
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 61ed93a2d6ee04026193e126ce74441fb8e4901435672559aca25412878ad221
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
testing commit 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 54a1c1d93140c4a8d090f869afec1684bc33396b9d3d43a7638d3a62636d149a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 21m8.775104873s (build: 14m31.508592709s, test: 6m15.697430402s)
the crash still happens on HEAD
commit msg: Linux 4.14.281
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