bisecting fixing commit since 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c building syzkaller on 77a55c8ea6070a9a88715db4c17e9612a7f99b21 testing commit 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c with gcc (GCC) 8.4.1 20210217 kernel signature: b68afd57423df6d529b9849da018362166baaacee31bb31dfc4ba5e7faeb730e run #0: crashed: BUG: corrupted list in kobject_add_internal run #1: crashed: BUG: corrupted list in kobject_add_internal run #2: crashed: BUG: corrupted list in kobject_add_internal run #3: crashed: BUG: corrupted list in kobject_add_internal run #4: crashed: BUG: corrupted list in kobject_add_internal run #5: crashed: BUG: corrupted list in kobject_add_internal run #6: crashed: BUG: corrupted list in kobject_add_internal run #7: crashed: BUG: corrupted list in kobject_add_internal run #8: crashed: BUG: corrupted list in kobject_add_internal run #9: crashed: BUG: corrupted list in kobject_add_internal run #10: crashed: BUG: corrupted list in kobject_add_internal run #11: crashed: BUG: corrupted list in kobject_add_internal run #12: crashed: BUG: corrupted list in kobject_add_internal run #13: crashed: BUG: corrupted list in kobject_add_internal run #14: crashed: BUG: corrupted list in kobject_add_internal run #15: crashed: BUG: corrupted list in kobject_add_internal run #16: crashed: BUG: corrupted list in kobject_add_internal run #17: crashed: WARNING in sysfs_warn_dup run #18: crashed: BUG: corrupted list in kobject_add_internal run #19: crashed: BUG: corrupted list in kobject_add_internal testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217 kernel signature: f37114b2a9a60019c3f4bd8009fa2d529e4b6b85021fa686471fd82b5048497b all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 25m9.483732594s (build: 18m14.319943569s, test: 6m23.528305013s) the crash still happens on HEAD commit msg: Linux 4.14.237 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 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: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout