bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on a7aac492ebbc53e5c7bc4b5bbaf55f428c54093f
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636 with gcc (GCC) 8.4.1 20210217
kernel signature: 45515e1a8b2731565331ef281c0b0499c6b0975b2c7d5bb8a4a0fa551c85a94e
run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #1: crashed: BUG: unable to handle kernel
run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #12: crashed: BUG: unable to handle kernel
run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #14: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #16: crashed: BUG: unable to handle kernel
run #17: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #18: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #19: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101
testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217
kernel signature: a4703d8fafc7f459f3995f6f2795286b8140357c4c90f340af8a4e425aaa5982
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 19m50.889857046s (build: 13m21.184104533s, test: 6m5.91842401s)
the crash still happens on HEAD
commit msg: Linux 4.14.237
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout