bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 59a331caaea3da7add61ec1fa1e9b7e899ccf23af925f0df0313f1b33fec95ee
all runs: crashed: KASAN: use-after-free Read in vlan_dev_get_iflink
testing current HEAD ed99bf0e81b558df39f7db2fa96d0228be4198c6
testing commit ed99bf0e81b558df39f7db2fa96d0228be4198c6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: aac3eea2d0d75481d5bf05b55acd904e706e86f4966163a9032a9155a69fa94a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m52.711537421s (build: 18m18.526810465s, test: 6m48.656875035s)
the crash still happens on HEAD
commit msg: Linux 4.14.250
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1