bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 32ad2685b7213d02448be0af89de655d489a46da0113a6ecbdbf6d7589d8033e
all runs: crashed: KASAN: use-after-free Read in hci_send_acl
testing current HEAD 964f3712e6a7447d9d3203f2be3f6c50e78ea179
testing commit 964f3712e6a7447d9d3203f2be3f6c50e78ea179
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 8bab8f7661afd5871521bcf9b8138d6a4d4c33c1db84036de6e727e577d8ebd0
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m29.01808492s (build: 21m29.153583866s, test: 6m17.113319586s)
the crash still happens on HEAD
commit msg: Linux 4.14.240
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1