bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on a2eb125d4d18e3e21b7dea6e857d2ffa288218e0
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: e88d4b0637b62158876a825dfc4d718556e04edf613fcab89aa7a955734a0bde
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 console_unlock
run #7: crashed: possible deadlock in console_unlock
run #8: crashed: possible deadlock in tty_port_close_start
run #9: crashed: possible deadlock in tty_port_close_start
run #10: crashed: possible deadlock in tty_port_close_start
run #11: crashed: possible deadlock in console_unlock
run #12: crashed: possible deadlock in tty_port_close_start
run #13: crashed: possible deadlock in console_unlock
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 tty_port_close_start
run #17: crashed: possible deadlock in tty_port_close_start
run #18: crashed: possible deadlock in console_unlock
run #19: crashed: possible deadlock in console_unlock
testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428
testing commit f96eb53cbd76415edfba99c2cfa88567a885a428
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f2cb4d92f85ad7a26f31d4fa09a7da1ea44653794459aa9ba7cb63e51c794de1
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m34.838611626s (build: 19m1.572156759s, test: 6m58.693935586s)
the crash still happens on HEAD
commit msg: Linux 4.14.246
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout