bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ce1644cb320e071f9cb3dfbe5905e6765bcd160a2b0fa45fdced1bb878a0d4e0
all runs: crashed: KASAN: use-after-free Read in vlan_dev_get_iflink
testing current HEAD 1048779a1d7dcf0b5c150188decafa21c19821e4
testing commit 1048779a1d7dcf0b5c150188decafa21c19821e4
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 1811f790f3fb2e5a6199f2af479323effed58b6e4eb563c3a37415ee4c267e37
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m4.618138519s (build: 22m15.707795709s, test: 6m48.90436849s)
the crash still happens on HEAD
commit msg: Linux 4.14.287
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1