bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: bbcc1fe132c6bbea94fd248a4b1833d829d74d20a4f0b5ec2828a41be4f8416d
all runs: crashed: KASAN: use-after-free Read in hci_send_acl
testing current HEAD 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
testing commit 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4e51a5bd9039c0225c831594a0234cd84b0cafe79a53bcdfb967af90aaabfd30
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m5.241686815s (build: 21m1.592365063s, test: 5m58.244210038s)
the crash still happens on HEAD
commit msg: Linux 4.14.276
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1