bisecting fixing commit since 12cd844a39ed16aa183a820a54fe6f9a0bb4cd14
building syzkaller on 749688d22abef3f3cb9a0480e15c19a3f2ed8e13
testing commit 12cd844a39ed16aa183a820a54fe6f9a0bb4cd14
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d2c3b79767d024e3220380bd000395aa7fda4f4226700accbc06c09e15a8a655
all runs: crashed: KASAN: use-after-free Read in xfrm6_tunnel_destroy
testing current HEAD f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f
testing commit f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7cf6fc0628e138d51c4ae74994db030487b4e6e01c5957f72e54d2834019c35d
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 37m33.082142572s (build: 24m1.158020872s, test: 12m36.761710825s)
the crash still happens on HEAD
commit msg: Linux 4.14.248
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1