bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67 building syzkaller on 1b88c6d5c8477f1d4fb3b389443b200acc32e9a8 testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: f87994d0e6a96c911e96395b903f5e4140aa373c2e6ccbd087c4b7e5e29e2aff all runs: crashed: KASAN: use-after-free Read in ntfs_are_names_equal testing current HEAD fa33f9094f36943ea32f7fbe323293b62e96151d testing commit fa33f9094f36943ea32f7fbe323293b62e96151d compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 31fddc6d1937c4e55197994c91cc6ef65d59bbf512a7344cbf754ca57ab555f7 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 33m0.345135195s (build: 25m54.426764759s, test: 6m28.988959381s) the crash still happens on HEAD commit msg: Linux 4.14.268 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout