bisecting fixing commit since ca4f2c56d4162a4a5236f2099b55453fb98296f9
building syzkaller on 0487ea6f5d997a8363eba0d2eb0ea7a925444555
testing commit ca4f2c56d4162a4a5236f2099b55453fb98296f9
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ad70d3c5a0862d0faf9a0b038da4b8882e1f8c6e834e769f734e5398911073b6
all runs: crashed: KASAN: use-after-free Read in hci_send_acl
testing current HEAD 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
testing commit 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a4ea8e6e600d7928b5d0d08d9b42ff75fd50eae48bd28dc7e9215cf19bef3071
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m2.246669457s (build: 19m3.437490843s, test: 6m25.611402796s)
the crash still happens on HEAD
commit msg: Linux 4.14.247
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1