bisecting fixing commit since 8961076ed318dfd22aa357b41589f07bf67e73b6
building syzkaller on 0767f13fbd87c99aea7893eb64199b76be42cd61
testing commit 8961076ed318dfd22aa357b41589f07bf67e73b6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: dcf88bf0f591537c0a7cf97be4fb145db8b4ed072501324cb59904e7110da827
run #0: crashed: possible deadlock in kcm_ioctl
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 strp_sock_lock
run #5: crashed: possible deadlock in strp_sock_lock
run #6: crashed: possible deadlock in strp_sock_lock
run #7: crashed: possible deadlock in kcm_ioctl
run #8: crashed: possible deadlock in strp_sock_lock
run #9: crashed: possible deadlock in kcm_ioctl
run #10: crashed: possible deadlock in kcm_ioctl
run #11: crashed: possible deadlock in strp_sock_lock
run #12: crashed: possible deadlock in kcm_ioctl
run #13: crashed: possible deadlock in strp_sock_lock
run #14: crashed: possible deadlock in strp_sock_lock
run #15: crashed: possible deadlock in strp_sock_lock
run #16: crashed: possible deadlock in kcm_ioctl
run #17: crashed: possible deadlock in strp_sock_lock
run #18: crashed: possible deadlock in kcm_ioctl
run #19: crashed: possible deadlock in kcm_ioctl
testing current HEAD f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f
testing commit f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 1a3d8ebc47bcebe97eb3e0ff9598df407f58827ce969be74ada9072ad63f82d1
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m13.67882994s (build: 19m12.334426682s, test: 6m25.663762082s)
the crash still happens on HEAD
commit msg: Linux 4.14.248
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout