bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 053babc380596c806329a5879599e4f29939b0e812453bcc93d91f97cb19cfd0
all runs: crashed: KASAN: use-after-free Read in vlan_dev_get_iflink
testing current HEAD bfdef05c8da46b022172695aa493cff7ac667a4b
testing commit bfdef05c8da46b022172695aa493cff7ac667a4b
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 1773c58c93fac5d3857d8882063e4f786ef8fa012cd58ab3e3ccc4b43989f671
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m59.977006793s (build: 19m6.206872796s, test: 7m8.787046243s)
the crash still happens on HEAD
commit msg: Linux 4.14.261
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1