bisecting fixing commit since 958e517f4e16952e9a2e2d58fd32d28ae4e23dda building syzkaller on fcdb12ba70875c410749932abf39160d19c753d9 testing commit 958e517f4e16952e9a2e2d58fd32d28ae4e23dda compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: fe63a22eb8ac4bc82a02f2550e6e63bd7a02f6292456a9ec11b62198e85b3d5d all runs: crashed: WARNING in drm_prime_destroy_file_private testing current HEAD c9fcc1545c3bb19f4e04b1c82bf5c2856fef39bd testing commit c9fcc1545c3bb19f4e04b1c82bf5c2856fef39bd compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 63bca2c4627b82e59c05661fdfe36fd9564b6abf08b059b8459c6a2da3edb2b8 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 23m11.13167455s (build: 16m19.710669196s, test: 6m25.2315246s) the crash still happens on HEAD commit msg: Linux 4.14.270 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: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout