bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on a2eb125d4d18e3e21b7dea6e857d2ffa288218e0
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c9a5d535ed8485152e4b7ce74e7454a951ced9c1a98c6222ba00ced21138aa43
run #0: crashed: possible deadlock in console_unlock
run #1: crashed: possible deadlock in tty_port_close_start
run #2: crashed: possible deadlock in tty_port_close_start
run #3: crashed: possible deadlock in tty_port_close_start
run #4: crashed: possible deadlock in tty_port_close_start
run #5: crashed: possible deadlock in console_unlock
run #6: crashed: possible deadlock in console_unlock
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 tty_port_close_start
run #12: crashed: possible deadlock in console_unlock
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 console_unlock
run #16: crashed: possible deadlock in console_unlock
run #17: crashed: possible deadlock in tty_port_close_start
run #18: crashed: possible deadlock in console_unlock
run #19: crashed: possible deadlock in tty_port_close_start
testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740
testing commit 162b95d01320370b80cb2d5724cea4ae538ac740
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a11ee1caabbad19f49d233ce44f0bee4c1e7c696dd31862af5b7c7c1ae0f7d57
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m28.763065464s (build: 20m49.03427109s, test: 6m4.553679827s)
the crash still happens on HEAD
commit msg: Linux 4.14.244
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout