bisecting fixing commit since 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 building syzkaller on 0ea7a8875d3f20d3bdf6323495521b62ef71878c testing commit 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 5f3a5ff5caf972749988e9fe5bbdce37e850724ef436a3493978aab141fecdf2 run #0: crashed: general protection fault in lock_timer_base run #1: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #2: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #3: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #4: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #5: crashed: WARNING: ODEBUG bug in tipc_subscrb_subscrp_delete run #6: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #7: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #8: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #9: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #10: crashed: WARNING: ODEBUG bug in tipc_subscrb_subscrp_delete run #11: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #12: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #13: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #14: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #15: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #16: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #17: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #18: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb run #19: crashed: KASAN: use-after-free Read in tipc_subscrb_rcv_cb testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428 testing commit f96eb53cbd76415edfba99c2cfa88567a885a428 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: b7eac2a18598cf057f32d95ab51a714d2cb01788f43b5c134afcf9f0174a59df all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 26m6.498279944s (build: 18m24.717261332s, test: 7m12.47410662s) the crash still happens on HEAD commit msg: Linux 4.14.246 crash: unregister_netdevice: waiting for DEV to become free 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: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci5 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: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci5 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: hci1 command 0x0419 tx timeout