bisecting fixing commit since 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c building syzkaller on 1bf9a662c66aa432ff2fe3bf2562578cef626c09 testing commit 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 5c53ea3f546303ee12a0cdaf5c82f08f8ec8287a69e5a2d6d2e06c0c6da1fff5 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: OK run #19: OK testing current HEAD b86ee2b7ae42b6b37a918b66236608e2cc325f59 testing commit b86ee2b7ae42b6b37a918b66236608e2cc325f59 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 2355abe5a15f7cfbd7264e7b6b97498e9b660bf521de15e0fcab662d5429a97b all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 31m26.565461462s (build: 18m49.268823468s, test: 12m3.329871422s) the crash still happens on HEAD commit msg: Linux 4.14.264 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci3 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: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout