bisecting fixing commit since 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79 building syzkaller on e5b64d68915ed04952cef2f5dcb3f3ccbb7cfa57 testing commit 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: f31f6e9dcb0005389c9b3cdef9f7ba010aefdae9b0aba7a1bd71ea555ee1ef8c run #0: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #1: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #2: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #3: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #4: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #5: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #6: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #7: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #8: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #9: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #10: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #11: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #12: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #13: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #14: crashed: SYZFAIL: clock_gettime failed run #15: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #16: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #17: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #18: crashed: SYZFAIL: netlink_send_ext: netlink read failed run #19: crashed: SYZFAIL: netlink_send_ext: netlink read failed testing current HEAD a6ca7c65b1376f7bb14979cb745d3da73c8de948 testing commit a6ca7c65b1376f7bb14979cb745d3da73c8de948 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 58a6823fde0f1971410892804d497ef83481e6a29bd146ec5958ac9bee3aa542 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 27m35.206820247s (build: 20m0.826750723s, test: 6m57.24182979s) the crash still happens on HEAD commit msg: Linux 4.14.260 crash: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 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: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout