bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207 building syzkaller on bc5434be1a615eca6d901c20b026712bd9697fd4 testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 16cd21f797852ff4f4f0843f0b78527b58b056d10b196410ca43fb610d359b39 run #0: crashed: SYZFAIL: failed to mkdtemp run #1: OK run #2: OK run #3: crashed: SYZFAIL: failed to mkdtemp run #4: crashed: SYZFAIL: failed to mkdtemp run #5: OK run #6: crashed: SYZFAIL: failed to mkdtemp run #7: OK run #8: OK run #9: OK run #10: crashed: SYZFAIL: failed to mkdtemp run #11: crashed: SYZFAIL: failed to mkdtemp run #12: crashed: SYZFAIL: failed to mkdtemp run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: crashed: SYZFAIL: failed to mkdir reproducer seems to be flaky testing current HEAD b86ee2b7ae42b6b37a918b66236608e2cc325f59 testing commit b86ee2b7ae42b6b37a918b66236608e2cc325f59 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9c3583d83b715cf35a8a9254c1ad713d7b202fe34e22c591824b172dc311874f all runs: crashed: unregister_netdevice: waiting for DEV to become free Reproducer flagged being flaky revisions tested: 2, total time: 29m50.771348642s (build: 21m28.125128216s, test: 7m55.023372055s) the crash still happens on HEAD commit msg: Linux 4.14.264 crash: unregister_netdevice: waiting for DEV to become free 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: hci1 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout