bisecting fixing commit since 458a534cac0c808fce164cc961f8384ffc8c455e building syzkaller on ac7ca78e73a05a08918dd014f40739b3bbc26ea6 testing commit 458a534cac0c808fce164cc961f8384ffc8c455e compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 93f6e02a8e774403dd1947331dbd175aeb311e65cec2036370008aa179669ac8 all runs: crashed: KASAN: use-after-free Read in radix_tree_next_chunk testing current HEAD 46914f96189be290174e378c6bf9ccadfdb9ca1e testing commit 46914f96189be290174e378c6bf9ccadfdb9ca1e compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: df6f23bab573c833eb4a2ab4c091d41b4d0d73bb0bac57e2e5a2e40721813786 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 26m4.012435437s (build: 19m31.505306374s, test: 6m4.156109093s) the crash still happens on HEAD commit msg: Linux 4.14.243 crash: unregister_netdevice: waiting for DEV to become free can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout 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: hci0 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci0 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: hci3 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout