bisecting fixing commit since 12cd844a39ed16aa183a820a54fe6f9a0bb4cd14
building syzkaller on 749688d22abef3f3cb9a0480e15c19a3f2ed8e13
testing commit 12cd844a39ed16aa183a820a54fe6f9a0bb4cd14 with gcc (GCC) 8.4.1 20210217
kernel signature: fcdf6ce99abe1a0c922a5b4e6fc5c529a49017875b172969751d7435de5a3d9d
all runs: crashed: KASAN: use-after-free Read in xfrm6_tunnel_destroy
testing current HEAD 313e82bbefb3d1d926858b58092f5d50f41d924d
testing commit 313e82bbefb3d1d926858b58092f5d50f41d924d with gcc (GCC) 8.4.1 20210217
kernel signature: e1a0b8bf5f2fa0a625a12b00a489a5ae8148a321f823b4127936ca16cf50e790
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m24.393294785s (build: 16m18.582109697s, test: 12m11.284762439s)
the crash still happens on HEAD
commit msg: Linux 4.14.238
crash: unregister_netdevice: waiting for DEV to become free
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1