bisecting fixing commit since 958e517f4e16952e9a2e2d58fd32d28ae4e23dda building syzkaller on fcdb12ba70875c410749932abf39160d19c753d9 testing commit 958e517f4e16952e9a2e2d58fd32d28ae4e23dda compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 7ae0805cbffb23e9cbb636507d28fa9c6cec907fb3be496d51452b1025138b5c all runs: crashed: WARNING in drm_prime_destroy_file_private testing current HEAD 21ad423fe5210f5aa50bd43f9ae99b655090a227 testing commit 21ad423fe5210f5aa50bd43f9ae99b655090a227 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 362c30ba82dcd6eb6e4a693c251d033fa7892f2c963d6a67bac0d2905ac4d5c5 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 25m15.502233665s (build: 18m20.598804881s, test: 6m24.005773096s) the crash still happens on HEAD commit msg: Linux 4.14.265 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: hci2 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout