bisecting fixing commit since cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 building syzkaller on aba2b2fb3544d9e42991237c13d8cada421deda5 testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 825d5a57c5e22d88bb3f518950342d5571d64393a381079e18fe7c292dc2a190 all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD 4ba8e26127c393c32776dff6d79c5b82de6dc542 testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 38e38d4b6957a1d22b67cd606352f9d24cbf8bfdc8bafb4b29a8c9482d5e1f1f all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 29m14.125074395s (build: 22m7.41852389s, test: 6m37.111733328s) the crash still happens on HEAD commit msg: Linux 4.14.262 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: hci0 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout