bisecting fixing commit since 14b58326976de6ef3998eefec1dd7f8b38b97a75
building syzkaller on f721e4a097714a9054b9fe1aadf427afbbd2c157
testing commit 14b58326976de6ef3998eefec1dd7f8b38b97a75
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 1120321dcc7070408febc13d0fc431d570d9d06ac0b9fec1ca831a7b1dd834a9
all runs: crashed: KASAN: use-after-free Read in lock_sock_nested
testing current HEAD 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
testing commit 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: fecbc4f61110d9fefd1ebeca006e651b9c2e2884a88fb90b9fc67e6f0ff95db1
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m18.305555498s (build: 20m40.818756399s, test: 9m6.33525468s)
the crash still happens on HEAD
commit msg: Linux 4.14.247
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1