bisecting fixing commit since ad8397a84e1e425e3f8221638cee2bfa237d9b2c building syzkaller on 858ea628800647d5e5b68b11441e42b8ef5652c1 testing commit ad8397a84e1e425e3f8221638cee2bfa237d9b2c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 2c91b554b97ec179d870bee4383acb9b914721eae9c0b00358fab17776cd3d22 all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD 8034e99d1a010a795b979582c0b2370584d8abf4 testing commit 8034e99d1a010a795b979582c0b2370584d8abf4 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 0e555746e77380140a9ff64ba3732095a0e22a7f433fc193938f8e81431d9847 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 23m38.288673069s (build: 16m0.882962482s, test: 6m52.131931618s) the crash still happens on HEAD commit msg: Linux 4.14.266 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: hci1 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout