bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 135686788eb9e325804970f4d2b0492acc9d45ba8a25a24bb0563eb337c63c46
all runs: crashed: KASAN: use-after-free Read in vlan_dev_get_iflink
testing current HEAD b8f3be299d5176348b15cc59d55b85faa3dece68
testing commit b8f3be299d5176348b15cc59d55b85faa3dece68
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c0b60b1828c28367e059ab03d0292242d9a1bfdfbd802278147c9871cad6fe9a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m33.233887204s (build: 19m26.748919669s, test: 7m21.323147894s)
the crash still happens on HEAD
commit msg: Linux 4.14.282
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1