bisecting fixing commit since ad8397a84e1e425e3f8221638cee2bfa237d9b2c building syzkaller on 858ea628800647d5e5b68b11441e42b8ef5652c1 testing commit ad8397a84e1e425e3f8221638cee2bfa237d9b2c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9e287dcf27c0c4ca612365b74ebc9cc6ad7ec2d4d6a11e0cf06fbc5a557a5564 all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD fa33f9094f36943ea32f7fbe323293b62e96151d testing commit fa33f9094f36943ea32f7fbe323293b62e96151d compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: d5028a71dd422b99c99f19ef79b196416844a7315e2486f6199daf5dfeb61f15 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 33m4.576063726s (build: 25m27.135309495s, test: 6m33.773729861s) the crash still happens on HEAD commit msg: Linux 4.14.268 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: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout