bisecting fixing commit since 050272a0423e68207fd2367831ae610680129062
building syzkaller on e3ecea2e7fc6b80cc715c596105f4cf890e7e2e6
testing commit 050272a0423e68207fd2367831ae610680129062 with gcc (GCC) 8.4.1 20210217
kernel signature: 23c9fafe6461a4e760a49c93dcc2032867413b9d33c201dc4de2bf7f197586f1
all runs: crashed: possible deadlock in rtnl_lock
testing current HEAD 313e82bbefb3d1d926858b58092f5d50f41d924d
testing commit 313e82bbefb3d1d926858b58092f5d50f41d924d with gcc (GCC) 8.4.1 20210217
kernel signature: a898c4e9cac7c28c8bbd0686d8477d426bb161bf0445fbf3be38f6ccd7673c42
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 23m3.357810894s (build: 16m28.81881224s, test: 6m3.630870333s)
the crash still happens on HEAD
commit msg: Linux 4.14.238
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1