bisecting fixing commit since 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
building syzkaller on a938f0b814c3578d9608be02ef72b45d2b10cf4b
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: cbba76c1dd4a4e288c096d464c9bd2ded646cddd47ca583e68bd5d318c24fd45
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 4ba8e26127c393c32776dff6d79c5b82de6dc542
testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 95cb363b29c68e143af3aa98d4dfff8763e08421ffa09322d374679662b05f99
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m25.070353342s (build: 18m7.510224876s, test: 6m47.487765631s)
the crash still happens on HEAD
commit msg: Linux 4.14.262
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1