bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207 building syzkaller on 06c27ff56b460864b5195bc0668d1d582df3cbf8 testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 0fa7fac148ba723a6b16c9bfb5871b7cee0cf11f9f7efa5acbe6b4cb6d85ec56 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 9dfbac0e6b8600043de8dc85ed072f5f1342dc15 testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6550747b2b4169e749e3d1291f369fa945a794adbfc530077118415d94228379 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 31m15.869862408s (build: 15m56.895220398s, test: 14m49.635734074s) the crash still happens on HEAD commit msg: Linux 4.14.258 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout