syzbot


KASAN: use-after-free Read in fbcon_cursor
Status: upstream: reported syz repro on 2019/12/15 20:35
Reported-by: syzbot+9116ecc1978ca3a12f43@syzkaller.appspotmail.com
First crash: 64d, last: 20d

Cause bisection: the bug happens on the oldest tested release
Crash: KASAN: use-after-free Read in fbcon_putcs (log)
Repro: syz .config
similar bugs (2):
Kernel Title Repro Bisected Count Last Reported Patched Status
linux-4.14 KASAN: use-after-free Read in fbcon_cursor syz 1 4d04h 64d 0/1 upstream: reported syz repro on 2019/12/15 04:16
linux-4.19 KASAN: use-after-free Read in fbcon_cursor syz 2 6d14h 64d 0/1 upstream: reported syz repro on 2019/12/15 03:47

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro
ci-upstream-kasan-gce-selinux-root 2020/01/28 02:55 upstream b0be0eff eef6e580 .config log report syz
Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-selinux-root 2019/12/15 07:04 upstream 07c4b9e9 eef6e580 .config log report syz b.zolnierkie@samsung.com, daniel.vetter@ffwll.ch, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, sam@ravnborg.org
ci-upstream-kasan-gce-root 2019/12/15 05:47 upstream 07c4b9e9 eef6e580 .config log report syz b.zolnierkie@samsung.com, daniel.vetter@ffwll.ch, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, sam@ravnborg.org
ci-upstream-linux-next-kasan-gce-root 2019/12/25 14:54 linux-next 7ddd09fc be5c2c81 .config log report syz b.zolnierkie@samsung.com, daniel.vetter@ffwll.ch, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, sam@ravnborg.org