bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207 building syzkaller on 06c27ff56b460864b5195bc0668d1d582df3cbf8 testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 3a43a6f14fa7db5ff95a06212518ebc7b9450a9bb44ea0f191aaaaa5dd6223ee run #0: crashed: general protection fault in kobject_uevent run #1: crashed: general protection fault in kobject_uevent run #2: crashed: general protection fault in kobject_uevent run #3: crashed: general protection fault in kobject_uevent run #4: crashed: general protection fault in kobject_uevent run #5: crashed: general protection fault in kobject_uevent run #6: crashed: general protection fault in kobject_uevent run #7: crashed: general protection fault in kobject_uevent run #8: crashed: general protection fault in kobject_uevent run #9: crashed: general protection fault in kobject_uevent run #10: crashed: general protection fault in kobject_uevent 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 f6b016a9d961296d2db609d0259654371625e22e testing commit f6b016a9d961296d2db609d0259654371625e22e compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 95481f1f05cc57508b2891bd5527863f9e1df435d998fd8225cd45a4308a2fdb all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 30m42.50262562s (build: 15m32.78183764s, test: 14m40.004310916s) the crash still happens on HEAD commit msg: Linux 4.14.251 crash: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 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