bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on a2eb125d4d18e3e21b7dea6e857d2ffa288218e0
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 with gcc (GCC) 8.4.1 20210217
kernel signature: 3064798c300388a9566ac437b1342ce1dddd35b5d1ae046f7bf3e41e7f5fb5ba
run #0: crashed: possible deadlock in console_unlock
run #1: crashed: possible deadlock in tty_port_close_start
run #2: crashed: possible deadlock in console_unlock
run #3: crashed: possible deadlock in console_unlock
run #4: crashed: possible deadlock in tty_port_close_start
run #5: crashed: possible deadlock in console_unlock
run #6: crashed: possible deadlock in tty_port_close_start
run #7: crashed: possible deadlock in tty_port_close_start
run #8: crashed: possible deadlock in console_unlock
run #9: crashed: possible deadlock in console_unlock
run #10: crashed: possible deadlock in console_unlock
run #11: crashed: possible deadlock in console_unlock
run #12: crashed: possible deadlock in tty_port_close_start
run #13: crashed: possible deadlock in tty_port_close_start
run #14: crashed: possible deadlock in tty_port_close_start
run #15: crashed: possible deadlock in tty_port_close_start
run #16: crashed: possible deadlock in console_unlock
run #17: crashed: possible deadlock in tty_port_close_start
run #18: crashed: possible deadlock in tty_port_close_start
run #19: crashed: possible deadlock in console_unlock
testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101
testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217
kernel signature: ab94cc8598fed89654c6e77e22f57fe72d547e736f51b0939a2745c1b86f1a32
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 24m56.752927041s (build: 18m15.723497913s, test: 6m17.200656109s)
the crash still happens on HEAD
commit msg: Linux 4.14.237
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout