bisecting fixing commit since 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c building syzkaller on 1bf9a662c66aa432ff2fe3bf2562578cef626c09 testing commit 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 429a4af5cbfa5de3001a16ab4029783dc4c0bddf9c120fab9b8209baaf1eceb6 run #0: crashed: KASAN: use-after-free Read in lbmIODone run #1: crashed: KASAN: use-after-free Read in lbmIODone run #2: crashed: KASAN: use-after-free Read in lbmIODone run #3: crashed: KASAN: use-after-free Read in lbmIODone run #4: crashed: KASAN: use-after-free Read in lbmIODone run #5: crashed: KASAN: use-after-free Read in lbmIODone run #6: crashed: KASAN: use-after-free Read in lbmIODone run #7: crashed: KASAN: use-after-free Read in lbmIODone run #8: crashed: KASAN: use-after-free Read in lbmIODone run #9: crashed: KASAN: use-after-free Read in lbmIODone run #10: crashed: KASAN: use-after-free Read in lbmIODone run #11: crashed: KASAN: use-after-free Read in lbmIODone run #12: crashed: KASAN: use-after-free Read in lbmIODone run #13: crashed: KASAN: use-after-free Read in lbmIODone run #14: crashed: KASAN: use-after-free Read in lbmIODone run #15: crashed: KASAN: use-after-free Read in lbmIODone run #16: crashed: KASAN: use-after-free Read in lbmIODone run #17: crashed: KASAN: use-after-free Read in lbmIODone run #18: crashed: KASAN: use-after-free Read in lbmIODone run #19: OK testing current HEAD 964f3712e6a7447d9d3203f2be3f6c50e78ea179 testing commit 964f3712e6a7447d9d3203f2be3f6c50e78ea179 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 0c3a3d834f7d5a86979760db563fbcd2761f42fa69f706bbf451d0d2c4167ccd all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 29m0.285576064s (build: 16m43.265326976s, test: 11m54.796638664s) the crash still happens on HEAD commit msg: Linux 4.14.240 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout