bisecting fixing commit since 2d2791fce891fc20709232d49a6bae075b9a77f8
building syzkaller on a57db36fe48aa500618c2eac3b38c27afe6d290f
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 199a6e192fc286142c42d2fa1a748219a4227d045ae34784095ee599edb50d67
all runs: crashed: KASAN: use-after-free Read in disk_unblock_events
testing current HEAD bbb957e1bd4a337c0d10d599d284a7475bca47cb
testing commit bbb957e1bd4a337c0d10d599d284a7475bca47cb
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 9143d3b0f4c491ef0de3b32840393f91a7c79ec240b18e61c45d9aca836dd286
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 21m27.840489214s (build: 14m36.590813198s, test: 6m24.554658329s)
the crash still happens on HEAD
commit msg: Linux 4.14.263
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout