bisecting fixing commit since 8961076ed318dfd22aa357b41589f07bf67e73b6
building syzkaller on 0767f13fbd87c99aea7893eb64199b76be42cd61
testing commit 8961076ed318dfd22aa357b41589f07bf67e73b6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a60fc2d2726ac707ed075a3e6b4232810dbf6940c1e2271ab5591437db727215
run #0: crashed: possible deadlock in kcm_ioctl
run #1: crashed: possible deadlock in strp_sock_lock
run #2: crashed: possible deadlock in strp_sock_lock
run #3: crashed: possible deadlock in strp_sock_lock
run #4: crashed: possible deadlock in strp_sock_lock
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 strp_sock_lock
run #12: crashed: possible deadlock in strp_sock_lock
run #13: crashed: possible deadlock in strp_sock_lock
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 kcm_ioctl
testing current HEAD 35c4ba160ab6133e548468bd0bd1109990dc7736
testing commit 35c4ba160ab6133e548468bd0bd1109990dc7736
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: baf2ad056dd0150e1838e58c00c1c78d89c611c0fd8771ae3fcd9c9b32b02303
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m36.388144283s (build: 19m28.241917642s, test: 6m38.52698193s)
the crash still happens on HEAD
commit msg: Linux 4.14.245
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout