bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4bb243c490c8f38b5a8b555c28493c5183d5d7668adb8e6251ecdcd7227504c2
all runs: crashed: KASAN: use-after-free Read in hci_send_acl
testing current HEAD fa33f9094f36943ea32f7fbe323293b62e96151d
testing commit fa33f9094f36943ea32f7fbe323293b62e96151d
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: fda49bef1e0c7160902ce8d4e241f933bcd5441d9219bcfbae578cdefb137d54
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 32m34.749035997s (build: 24m19.397132774s, test: 6m21.330422348s)
the crash still happens on HEAD
commit msg: Linux 4.14.268
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1