bisecting fixing commit since 313e82bbefb3d1d926858b58092f5d50f41d924d building syzkaller on 55aa55c24fe77aae07d530662f91b4d50c4990f0 testing commit 313e82bbefb3d1d926858b58092f5d50f41d924d compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: f6f9444bcda50e1f866e0da21dffdda8ba3f5aae2662f12b5201d7633836a012 all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD ce4d1565392b2dc8ea33032615c934c3dc6a32bb testing commit ce4d1565392b2dc8ea33032615c934c3dc6a32bb compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 394ecf155a90a2b6f38ea007590830c955dcc67a295550a9e45cea4bc45cb4a4 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 26m17.787524154s (build: 19m28.187635845s, test: 6m13.798844709s) the crash still happens on HEAD commit msg: Linux 4.14.241 crash: unregister_netdevice: waiting for DEV to become free can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout