bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 93c485eda7b0060259f1c8bf7a19aa14513b8073e638c2e90d646c9b317eb7f5
all runs: crashed: KASAN: use-after-free Read in vlan_dev_get_iflink
testing current HEAD 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
testing commit 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 79d9a2b42567bb2c0b69b27de20de2754f855f523a5bc7c7b6178a7ff0f5ff52
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m3.488225864s (build: 18m25.631527804s, test: 7m4.976208089s)
the crash still happens on HEAD
commit msg: Linux 4.14.254
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1