bisecting fixing commit since f79dc86058bc0c8317eea2a0f968382c6ffb0cfb
building syzkaller on 468dbb556537f9a8f1afe43d2d5f1482b73db501
testing commit f79dc86058bc0c8317eea2a0f968382c6ffb0cfb with gcc (GCC) 8.4.1 20210217
kernel signature: ecfc9c936edbcbf69cb4164b1b76428a785fd8a3caf68d1312e5944887d2c8d9
all runs: crashed: possible deadlock in perf_event_release_kernel
testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101
testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217
kernel signature: cd9da01dc60ad448248588755267d590205ebbd9ceb302b4eeafc6e0383f1c41
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 21m46.742903576s (build: 14m50.168770683s, test: 6m34.918538002s)
the crash still happens on HEAD
commit msg: Linux 4.14.237
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci0 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: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout