bisecting fixing commit since 8961076ed318dfd22aa357b41589f07bf67e73b6
building syzkaller on 0767f13fbd87c99aea7893eb64199b76be42cd61
testing commit 8961076ed318dfd22aa357b41589f07bf67e73b6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b55fb0cb97f55ca7c3661ccf26b4899e850e87d56a8e36093b99e94c00ddb93a
run #0: crashed: possible deadlock in strp_sock_lock
run #1: crashed: possible deadlock in kcm_ioctl
run #2: crashed: possible deadlock in kcm_ioctl
run #3: crashed: possible deadlock in kcm_ioctl
run #4: crashed: possible deadlock in kcm_ioctl
run #5: crashed: possible deadlock in kcm_ioctl
run #6: crashed: possible deadlock in kcm_ioctl
run #7: crashed: possible deadlock in kcm_ioctl
run #8: crashed: possible deadlock in kcm_ioctl
run #9: crashed: possible deadlock in kcm_ioctl
run #10: crashed: possible deadlock in strp_sock_lock
run #11: crashed: possible deadlock in kcm_ioctl
run #12: crashed: possible deadlock in strp_sock_lock
run #13: crashed: possible deadlock in kcm_ioctl
run #14: crashed: possible deadlock in kcm_ioctl
run #15: crashed: possible deadlock in kcm_ioctl
run #16: crashed: possible deadlock in strp_sock_lock
run #17: crashed: possible deadlock in kcm_ioctl
run #18: crashed: possible deadlock in kcm_ioctl
run #19: crashed: possible deadlock in strp_sock_lock
testing current HEAD ce4d1565392b2dc8ea33032615c934c3dc6a32bb
testing commit ce4d1565392b2dc8ea33032615c934c3dc6a32bb
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c6e293d4d5c7bad0b167833394ab31d4f0bc0621a9335bd23ecfa7daddcaeda9
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 23m39.673312902s (build: 16m49.703257273s, test: 6m17.427757219s)
the crash still happens on HEAD
commit msg: Linux 4.14.241
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout