syzbot


KASAN: null-ptr-deref Read in refcount_sub_and_test_checked (2)
Status: fixed on 2020/02/18 10:28
Reported-by: syzbot+0468b73bdbb243217224@syzkaller.appspotmail.com
Fix commit: 62dcb4f41836 media: vb2: check memory model for VIDIOC_CREATE_BUFS
First crash: 1044d, last: 841d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: BUG: unable to handle kernel NULL pointer dereference in vb2_vmalloc_put (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit 62dcb4f41836bd3c44b5b651bb6df07ea4cb1551
Author: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Date: Thu Nov 8 12:23:37 2018 +0000

  media: vb2: check memory model for VIDIOC_CREATE_BUFS

similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: null-ptr-deref Read in refcount_sub_and_test_checked C 31 1052d 1083d 12/22 fixed on 2018/11/12 21:25

Sample crash report:

Crashes (916):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2018/11/13 14:41 upstream ccda4af0f4b9 5f5f6d14 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2018/11/13 14:40 upstream ccda4af0f4b9 5f5f6d14 .config log report syz C
ci-upstream-kasan-gce-root 2018/11/13 14:38 upstream ccda4af0f4b9 5f5f6d14 .config log report syz C
ci-upstream-kasan-gce-smack-root 2018/11/13 14:38 upstream ccda4af0f4b9 5f5f6d14 .config log report syz C
ci-upstream-kasan-gce-386 2018/11/13 16:30 upstream ccda4af0f4b9 5f5f6d14 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2018/11/13 13:54 linux-next 442b8cea2477 5f5f6d14 .config log report syz C
ci-upstream-kasan-gce 2018/12/23 00:34 upstream 23203e3f34c9 e3bd7ab8 .config log report
ci-upstream-kasan-gce-selinux-root 2018/12/21 07:26 upstream 9097a058d49e 2b497001 .config log report
ci-upstream-kasan-gce-smack-root 2018/12/13 07:49 upstream f5d582777bcb 02613a41 .config log report
ci-upstream-kasan-gce-root 2018/12/10 08:56 upstream 0844895a2e51 96cc4c50 .config log report
ci-upstream-kasan-gce-386 2018/12/19 06:33 upstream ddfbab46539f 4edaba93 .config log report
ci-upstream-net-this-kasan-gce 2019/06/03 20:46 net afa0925c6fcc 63bf051f .config log report
ci-upstream-net-this-kasan-gce 2019/06/03 19:44 net afa0925c6fcc 63bf051f .config log report
ci-upstream-net-this-kasan-gce 2019/06/03 00:44 net 8c268598192d 53c81ea5 .config log report
ci-upstream-net-this-kasan-gce 2019/06/02 20:22 net e8d67fa5696e 53c81ea5 .config log report
ci-upstream-net-this-kasan-gce 2019/06/02 17:56 net e8d67fa5696e 53c81ea5 .config log report
ci-upstream-net-this-kasan-gce 2019/06/02 15:05 net e8d67fa5696e 53c81ea5 .config log report
ci-upstream-net-this-kasan-gce 2019/06/01 17:12 net e8d67fa5696e 53c81ea5 .config log report
ci-upstream-net-this-kasan-gce 2019/06/01 07:20 net e8d67fa5696e 53c81ea5 .config log report
ci-upstream-net-this-kasan-gce 2019/06/01 05:26 net e8d67fa5696e 53c81ea5 .config log report
ci-upstream-net-this-kasan-gce 2019/05/31 16:08 net 100f6d8e0990 142ce681 .config log report
ci-upstream-net-this-kasan-gce 2019/05/31 05:00 net 4b280531e84c d9aaf3c2 .config log report
ci-upstream-net-this-kasan-gce 2019/05/31 01:57 net 4b280531e84c d9aaf3c2 .config log report
ci-upstream-net-this-kasan-gce 2019/05/30 17:12 net 58e8b37069ff d9aaf3c2 .config log report
ci-upstream-net-this-kasan-gce 2019/05/30 15:23 net 58e8b37069ff d9aaf3c2 .config log report
ci-upstream-net-this-kasan-gce 2019/05/29 22:31 net a6cd0d2d493a 5457ef34 .config log report
ci-upstream-net-this-kasan-gce 2019/05/29 20:23 net a6cd0d2d493a 5457ef34 .config log report
ci-upstream-net-this-kasan-gce 2019/05/29 08:31 net a6cd0d2d493a 6bd61501 .config log report
ci-upstream-net-this-kasan-gce 2019/05/29 02:29 net d484e06e25eb 6bd61501 .config log report
ci-upstream-net-this-kasan-gce 2019/05/28 09:17 net 3e66b7cc50ef 6bd61501 .config log report
ci-upstream-net-this-kasan-gce 2019/05/28 06:35 net 3e66b7cc50ef 6bd61501 .config log report
ci-upstream-net-this-kasan-gce 2019/05/28 04:28 net 3e66b7cc50ef 6bd61501 .config log report
ci-upstream-net-this-kasan-gce 2019/05/27 23:11 net 3e66b7cc50ef 6bd61501 .config log report
ci-upstream-net-this-kasan-gce 2019/05/27 19:50 net 3e66b7cc50ef 562efd79 .config log report
ci-upstream-net-this-kasan-gce 2019/05/27 18:09 net 3e66b7cc50ef 562efd79 .config log report
ci-upstream-net-this-kasan-gce 2019/05/27 08:11 net 334031219a84 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/27 05:59 net 334031219a84 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/26 14:08 net f4bcf14e3997 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/26 12:40 net f4bcf14e3997 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/26 08:17 net f4bcf14e3997 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/26 00:12 net 4097e9d250fb 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/25 23:02 net 4097e9d250fb 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/25 13:25 net ce8d24f9a596 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/25 07:37 net ce8d24f9a596 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/24 21:45 net ce8d24f9a596 85c57315 .config log report
ci-upstream-net-this-kasan-gce 2019/05/24 13:17 net b5730061d105 0dadcd9d .config log report
ci-upstream-net-this-kasan-gce 2019/05/24 07:14 net b5730061d105 0dadcd9d .config log report
ci-upstream-net-kasan-gce 2019/06/01 12:03 net-next c9bb6165a16e 53c81ea5 .config log report
ci-upstream-net-kasan-gce 2019/06/01 08:29 net-next c9bb6165a16e 53c81ea5 .config log report
ci-upstream-net-kasan-gce 2019/05/31 10:08 net-next 517f4c49aafc d9aaf3c2 .config log report
ci-upstream-net-kasan-gce 2019/05/30 20:13 net-next 517f4c49aafc d9aaf3c2 .config log report
ci-upstream-net-kasan-gce 2019/05/30 10:24 net-next 7da33a8f87a4 d9aaf3c2 .config log report
ci-upstream-net-kasan-gce 2019/05/30 09:20 net-next 7da33a8f87a4 d9aaf3c2 .config log report
ci-upstream-net-kasan-gce 2019/05/29 18:42 net-next 36f18439ea16 5457ef34 .config log report
ci-upstream-net-kasan-gce 2019/05/26 16:50 net-next 22942498cceb 85c57315 .config log report
ci-upstream-net-kasan-gce 2019/05/25 21:46 net-next 22942498cceb 85c57315 .config log report
ci-upstream-net-kasan-gce 2019/05/24 09:36 net-next 16fa1cf1ed2a 0dadcd9d .config log report
ci-upstream-linux-next-kasan-gce-root 2018/12/07 03:47 linux-next 442b8cea2477 dcf836b1 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/11/13 11:16 linux-next 442b8cea2477 5f5f6d14 .config log report