bisecting fixing commit since 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c building syzkaller on a52ee10ae11c1342cfca60cf3957619bcf92bd1a testing commit 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 245c83485ebcd872fd3b7c46062626d79b27635889638b8ca2a997d129c946a4 all runs: crashed: KASAN: use-after-free Read in rdma_listen testing current HEAD 35c4ba160ab6133e548468bd0bd1109990dc7736 testing commit 35c4ba160ab6133e548468bd0bd1109990dc7736 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: e90b3c2eaaf534225269110d53868d8a3f66b9546ba1782ef0b4b1856054ef36 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 26m45.362241632s (build: 19m40.32972439s, test: 6m36.864708885s) the crash still happens on HEAD commit msg: Linux 4.14.245 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 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: hci5 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout