bisecting fixing commit since 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c
building syzkaller on 14052202e8d8d0bb407512b6861e9085f9171241
testing commit 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c with gcc (GCC) 8.4.1 20210217
kernel signature: 179286bdd915f192ae2454f2940dc2f04b70696911b01e8b33265ae7a5b02ac6
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
run #7: crashed: BUG: unable to handle kernel
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
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 NULL pointer dereference in vhci_shutdown_connection
run #18: crashed: INFO: task hung in usb_get_descriptor
run #19: OK
testing current HEAD 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85
testing commit 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85 with gcc (GCC) 8.4.1 20210217
kernel signature: d5d8dc72929767bbe69cf69bb5b89287781efcd270ee3293de59daf80b9847c1
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 32m18.068324034s (build: 17m5.485431136s, test: 14m39.032427622s)
the crash still happens on HEAD
commit msg: Linux 4.14.236
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci3 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: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout