bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 building syzkaller on 7e2b734bac96c22086fedd1b18135da06d5e4054 testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 21868058de3e78079ad8f72bb7b8833c24664e29af293cde2082a19c170ea475 run #0: OK run #1: OK run #2: crashed: SYZFAIL: failed to mkdtemp run #3: OK run #4: crashed: SYZFAIL: failed to mkdtemp run #5: crashed: SYZFAIL: failed to mkdtemp run #6: OK run #7: crashed: SYZFAIL: failed to mkdtemp run #8: OK run #9: crashed: SYZFAIL: failed to mkdtemp run #10: crashed: SYZFAIL: failed to mkdtemp run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: crashed: SYZFAIL: failed to mkdir run #18: crashed: SYZFAIL: failed to mkdir run #19: crashed: SYZFAIL: failed to mkdir reproducer seems to be flaky testing current HEAD e3a56aaade89bc89f33baec11b12538fc22536e2 testing commit e3a56aaade89bc89f33baec11b12538fc22536e2 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 144c4d944f8ba3b3546d332f1dff889ec0009ca48655241749d9b79a18a48908 all runs: crashed: unregister_netdevice: waiting for DEV to become free Reproducer flagged being flaky revisions tested: 2, total time: 22m57.118261568s (build: 15m14.069226446s, test: 7m12.800855633s) the crash still happens on HEAD commit msg: Linux 4.14.277 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout