bisecting fixing commit since 2d2791fce891fc20709232d49a6bae075b9a77f8
building syzkaller on a57db36fe48aa500618c2eac3b38c27afe6d290f
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3c0da5d10a71a58859ddda2b2fe0144734f05898adc5c01424566377ad37e5f9
all runs: crashed: KASAN: use-after-free Read in disk_unblock_events
testing current HEAD 35c4ba160ab6133e548468bd0bd1109990dc7736
testing commit 35c4ba160ab6133e548468bd0bd1109990dc7736
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: cb95a810d9c284eef12debef003eeed3dd9e0b9221ddab0332a34d3d65fec95c
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 21m48.744591916s (build: 15m7.092294741s, test: 6m18.188348431s)
the crash still happens on HEAD
commit msg: Linux 4.14.245
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout