bisecting fixing commit since 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c
building syzkaller on 14052202e8d8d0bb407512b6861e9085f9171241
testing commit 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: de61e25886e33fe9c774295a22cb5f171524ff1e8f0db532aa4e1e33e75c78c5
run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in vhci_shutdown_connection
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 NULL pointer dereference in vhci_shutdown_connection
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 NULL pointer dereference in vhci_shutdown_connection
run #17: crashed: BUG: unable to handle kernel
run #18: OK
run #19: OK
testing current HEAD 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
testing commit 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 29900bb2c390c6afc222cd68dfc15071edda26a5fcb59bc3e597b25b4f7290c3
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m37.317131396s (build: 15m33.355138406s, test: 14m34.637555791s)
the crash still happens on HEAD
commit msg: Linux 4.14.254
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci1 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: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout