bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on a2eb125d4d18e3e21b7dea6e857d2ffa288218e0
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 97161d898f3f53873a6f6510280d3098b3e4940c987a3a83ee8260c22fc068d5
run #0: crashed: possible deadlock in tty_port_close_start
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 tty_port_close_start
run #9: crashed: possible deadlock in console_unlock
run #10: crashed: possible deadlock in tty_port_close_start
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 tty_port_close_start
run #17: crashed: possible deadlock in console_unlock
run #18: crashed: possible deadlock in console_unlock
run #19: crashed: possible deadlock in console_unlock
testing current HEAD f6b016a9d961296d2db609d0259654371625e22e
testing commit f6b016a9d961296d2db609d0259654371625e22e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c665aa2ae567d2c80f17be80d00a5ea3fdcc299f16a420bf7286198bba4f327a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 21m55.328762293s (build: 14m37.900857636s, test: 6m56.758598325s)
the crash still happens on HEAD
commit msg: Linux 4.14.251
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout