KASAN: use-after-free Read in refcount_sub_and_test_checked (2)
Status: upstream: reported syz repro on 2019/01/02 11:26
First crash: 266d, last: 157d
Bisection: introduced by (bisect log):

commit cd67d3272768aa3f44c0f7cc71b82a112dce01fa
Author: Aisheng Dong <>
Date: Thu Jan 24 13:22:49 2019 +0000

  clk: imx: scu: add fallback compatible string support

Tree: upstream
Crash: KASAN: use-after-free Write in _free_event (log)
Repro: syz .config
Bisection: the bug occurs on the latest tested release
Tree: upstream
Crash: INFO: task hung in perf_event_free_task (log)
Repro: syz .config
similar bugs (1):
Kernel Title Repro Bisected Count Last Reported Patched Status
upstream KASAN: use-after-free Read in refcount_sub_and_test_checked 3 416d 418d 9/14 fixed on 2018/08/08 18:10

Sample crash report:

All crashes (10):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-smack-root 2019/04/19 03:44 upstream 6d906f99 b0e8efcb .config log report syz,,,,,,,,,,,,,
ci-upstream-net-this-kasan-gce 2019/02/20 15:49 net 1765f5dc c95f0707 .config log report,,,,,,,
ci-upstream-net-this-kasan-gce 2019/01/31 05:53 net e15aa3b2 aa432daf .config log report,,,,,,,
ci-upstream-net-kasan-gce 2018/12/30 21:00 net-next b71acb0e 9942de5f .config log report,,,,,,,
ci-upstream-net-kasan-gce 2019/03/03 02:15 net-next cf29576f 1c0e457a .config log report,,,,,,,
ci-upstream-net-kasan-gce 2019/02/14 13:29 net-next d4b242a7 6a46f448 .config log report,,,,,,
ci-upstream-net-kasan-gce 2019/01/27 11:21 net-next a4b82994 c73f090a .config log report,,,,,,,
ci-upstream-net-kasan-gce 2019/01/26 10:32 net-next f859a448 c73f090a .config log report,,,,,,,
ci-upstream-net-kasan-gce 2019/01/19 09:29 net-next f04d402f 2103a236 .config log report,,,,,,,
ci-upstream-linux-next-kasan-gce-root 2019/02/15 16:59 linux-next 7a92eb7c f6f233c0 .config log report,,,,,,,,,,,,