bisecting fixing commit since 12cd844a39ed16aa183a820a54fe6f9a0bb4cd14
building syzkaller on 749688d22abef3f3cb9a0480e15c19a3f2ed8e13
testing commit 12cd844a39ed16aa183a820a54fe6f9a0bb4cd14
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: dc303fbea6dbb974128dc106b1096b5c4d17f9b78202e7bc327f30bd5f11ca0f
all runs: crashed: KASAN: use-after-free Read in xfrm6_tunnel_destroy
testing current HEAD a6ca7c65b1376f7bb14979cb745d3da73c8de948
testing commit a6ca7c65b1376f7bb14979cb745d3da73c8de948
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 509b71ba4e3e8a71e8cbcae818086613ef1e1649b9aca4837c5793d1d84c5d03
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m52.679482319s (build: 17m1.398555628s, test: 12m12.87219727s)
the crash still happens on HEAD
commit msg: Linux 4.14.260
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
random: crng init done
random: 7 urandom warning(s) missed due to ratelimiting