bisecting fixing commit since 4ba8e26127c393c32776dff6d79c5b82de6dc542
building syzkaller on 214351e168def9426c79e1f65a93ddb112cee906
testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3f8043b1e26c66cfa3342865af6f73cc8b7e569b27d6ca4802f2f19dcc943e29
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD e853993d29aa42ac4b3c2912db975a0a66d7a5b0
testing commit e853993d29aa42ac4b3c2912db975a0a66d7a5b0
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 93915c26777f4d4bb19c4064fecac58fb5abdc23f0613dbc836aef5e35999178
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 23m23.946199256s (build: 16m2.891094418s, test: 6m42.24222448s)
the crash still happens on HEAD
commit msg: Linux 4.14.269
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1