bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 building syzkaller on 7e2b734bac96c22086fedd1b18135da06d5e4054 testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 with gcc (GCC) 8.4.1 20210217 kernel signature: d58fb0c9efa058878c6a3a83549c10c583d3ff4a80acdac411549908fc60a507 run #0: OK run #1: OK run #2: crashed: SYZFAIL: failed to mkdtemp run #3: crashed: SYZFAIL: failed to mkdtemp run #4: OK run #5: OK run #6: crashed: SYZFAIL: failed to mkdir run #7: OK run #8: crashed: SYZFAIL: failed to mkdtemp run #9: OK run #10: OK run #11: OK run #12: OK run #13: crashed: SYZFAIL: failed to mkdtemp run #14: crashed: SYZFAIL: failed to mkdir run #15: crashed: SYZFAIL: failed to mkdir run #16: crashed: SYZFAIL: failed to mkdir run #17: crashed: SYZFAIL: failed to mkdir run #18: crashed: SYZFAIL: failed to mkdir run #19: crashed: SYZFAIL: failed to mkdir testing current HEAD 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85 testing commit 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85 with gcc (GCC) 8.4.1 20210217 kernel signature: 866c0775e6c8c1b9283010aa52f0a16c3ca6ebd5301053bbd8ee5cf2b70a2025 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 29m33.531714051s (build: 21m26.238579201s, test: 7m22.988234967s) the crash still happens on HEAD commit msg: Linux 4.14.236 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: hci0 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout