bisecting fixing commit since 2b79150141611d3c6e1b55d4e70f49602482f0b8
building syzkaller on a6e3ac3bf259067ffd6e50fe8e4a158f097c1da5
testing commit 2b79150141611d3c6e1b55d4e70f49602482f0b8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c3b22146f3666d5f9afd08822b7a55c91c35f5576bfba42503ec0b368b571cf8
run #0: crashed: possible deadlock in tty_port_close_start
run #1: crashed: possible deadlock in console_unlock
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 console_unlock
run #5: crashed: possible deadlock in tty_port_close_start
run #6: crashed: possible deadlock in console_unlock
run #7: crashed: possible deadlock in console_unlock
run #8: crashed: possible deadlock in console_unlock
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 console_unlock
run #13: crashed: possible deadlock in console_unlock
run #14: crashed: possible deadlock in console_unlock
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 console_unlock
run #19: crashed: possible deadlock in console_unlock
testing current HEAD 66722c42ec916e92cadda46316f8f6e3fdcaedc6
testing commit 66722c42ec916e92cadda46316f8f6e3fdcaedc6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 5f80ca8a84f9caee1971ec0c0e75f3d2f892392a2245282f85dcd9d92150da4e
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m36.095165304s (build: 18m17.69548888s, test: 6m42.427262758s)
the crash still happens on HEAD
commit msg: Linux 4.14.256
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci3 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: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout