bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67 building syzkaller on fc7735a27949755327024847e12dcc1b868bcb99 testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 038550ca9a8b2321b3284ad0f4d0b65f9bc5f81bb9ed158ee8a0fabda745362d run #0: crashed: KASAN: use-after-free Read in perf_output_read run #1: crashed: KASAN: use-after-free Read in perf_output_read run #2: crashed: KASAN: slab-out-of-bounds Read in perf_output_read run #3: crashed: KASAN: use-after-free Read in perf_output_read run #4: crashed: KASAN: use-after-free Read in perf_output_read run #5: crashed: KASAN: use-after-free Read in perf_output_read run #6: crashed: KASAN: use-after-free Read in perf_output_read run #7: crashed: KASAN: slab-out-of-bounds Read in perf_output_read run #8: crashed: KASAN: use-after-free Read in perf_output_read run #9: crashed: KASAN: use-after-free Read in perf_output_read run #10: crashed: KASAN: use-after-free Read in perf_output_read run #11: crashed: BUG: soft lockup in __perf_sw_event run #12: crashed: KASAN: use-after-free Read in perf_output_read run #13: crashed: KASAN: use-after-free Read in perf_output_read run #14: crashed: BUG: soft lockup in __perf_sw_event run #15: crashed: KASAN: use-after-free Read in perf_output_read run #16: crashed: KASAN: use-after-free Read in perf_output_read run #17: crashed: KASAN: slab-out-of-bounds Read in perf_output_read run #18: crashed: BUG: soft lockup in __perf_sw_event run #19: crashed: KASAN: use-after-free Read in perf_output_read testing current HEAD eb045674aab31aa55a4f9aec27cce36e3d946a21 testing commit eb045674aab31aa55a4f9aec27cce36e3d946a21 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 966430743ed9ec030b52340717492daf2ae0f38e51b7531b10d6233055ddf173 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 39m23.55382535s (build: 25m9.433183954s, test: 13m46.189285175s) the crash still happens on HEAD commit msg: Linux 4.14.272 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: hci0 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 Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout