bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: da454a49ef5d86b24205751a281d70d09e2f2a98ba7899990916c880d82eefbf
all runs: crashed: KASAN: use-after-free Read in vlan_dev_get_iflink
testing current HEAD c01d4d1b885d96a7c8c27d629abeb918ca897dbe
testing commit c01d4d1b885d96a7c8c27d629abeb918ca897dbe
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2da59f747bc7bf10d2f340c304717fc0bf1720faf9c5a4464ec8b9a7836235e8
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m15.434069965s (build: 20m55.473270486s, test: 7m36.377927998s)
the crash still happens on HEAD
commit msg: Linux 4.14.257
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1