bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67
building syzkaller on 5ef9c29141f85f210b326ce68718498ae0c1fd35
testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 with gcc (GCC) 8.4.1 20210217
kernel signature: 2224112a5b92560025ed9f8d928760417f4838ba571b026b596475c75f83e3b2
all runs: crashed: possible deadlock in lock_trace
testing current HEAD 96afcb20f36f07683aaa342e592ea8ec76fd1fa6
testing commit 96afcb20f36f07683aaa342e592ea8ec76fd1fa6 with gcc (GCC) 8.4.1 20210217
kernel signature: 4c572bf445d88f944e1088b500400678504cd042e1da0fc862f3b1cf686a2e1a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m43.967532809s (build: 23m28.790858263s, test: 6m50.51041169s)
the crash still happens on HEAD
commit msg: Linux 4.14.233
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1