bisecting fixing commit since 74766a973637a02c32c04c1c6496e114e4855239
building syzkaller on 53c67432e69b0df4ff64448b944cbffaecec20f4
testing commit 74766a973637a02c32c04c1c6496e114e4855239
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: dfdcde7738bd185799c9a36a1c88d4b81a6e784996da60a1552fcb2648f7dc66
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD dffb5c6ff09c51ed585e3e7665143df103867fc8
testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c26599770b19cf4bfba9171f2961e60c0bb9ed253f2b6b1005c2570d1cd3d48b
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m12.217817092s (build: 15m9.684105898s, test: 6m38.051537627s)
the crash still happens on HEAD
commit msg: Linux 4.14.280
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