bisecting fixing commit since d7e78d08fa77acdea351c8f628f49ca9a0e1029a building syzkaller on 816e0689d7d9d8321f8bf360740f0e516aee15ca testing commit d7e78d08fa77acdea351c8f628f49ca9a0e1029a compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 07efbf8f2211e62354f4a67e46cbac8f48474e5767761f55e0e8761330d69114 run #0: crashed: KASAN: use-after-free Read in __queue_work run #1: crashed: WARNING: ODEBUG bug in bt_host_release run #2: crashed: general protection fault in __queue_work run #3: crashed: KASAN: use-after-free Read in __queue_work run #4: crashed: general protection fault in __queue_work run #5: crashed: WARNING: ODEBUG bug in bt_host_release run #6: crashed: WARNING: ODEBUG bug in bt_host_release run #7: crashed: WARNING: ODEBUG bug in bt_host_release run #8: crashed: KASAN: use-after-free Read in __queue_work run #9: crashed: WARNING: ODEBUG bug in bt_host_release run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK testing current HEAD eb045674aab31aa55a4f9aec27cce36e3d946a21 testing commit eb045674aab31aa55a4f9aec27cce36e3d946a21 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 3e6d252740bb3ce8f5cd18ca491a26bf6b462b0e96e80fca45b0cf391ae39866 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 31m52.143257075s (build: 16m45.619627366s, test: 14m34.48038578s) the crash still happens on HEAD commit msg: Linux 4.14.272 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: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 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: hci0 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout