bisecting fixing commit since f79dc86058bc0c8317eea2a0f968382c6ffb0cfb
building syzkaller on 468dbb556537f9a8f1afe43d2d5f1482b73db501
testing commit f79dc86058bc0c8317eea2a0f968382c6ffb0cfb
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3038a5192b7116730183328dd3c9ea9e5071f17bb57dc42bd731db18ae831146
all runs: crashed: possible deadlock in perf_event_release_kernel
testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740
testing commit 162b95d01320370b80cb2d5724cea4ae538ac740
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d3a9f91772304101cdab1301d699987f34d9be80b030bcccd55694b08fffefd5
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m23.1429598s (build: 15m38.728449267s, test: 6m20.186625401s)
the crash still happens on HEAD
commit msg: Linux 4.14.244
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout