bisecting fixing commit since 2b79150141611d3c6e1b55d4e70f49602482f0b8 building syzkaller on a6e3ac3bf259067ffd6e50fe8e4a158f097c1da5 testing commit 2b79150141611d3c6e1b55d4e70f49602482f0b8 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 0f2f32130eb30a04d95e8d172397f036f4b67905993b0d76c8aa9c2e66463a33 all runs: crashed: possible deadlock in console_unlock testing current HEAD b8f3be299d5176348b15cc59d55b85faa3dece68 testing commit b8f3be299d5176348b15cc59d55b85faa3dece68 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 1a76ee95ff4bed9bbeb2bca8a1897781e83b8493f10d83ab66067e70150f8750 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 23m58.352068878s (build: 15m29.257553098s, test: 7m30.946193387s) the crash still happens on HEAD commit msg: Linux 4.14.282 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout