syzbot


KASAN: out-of-bounds Read in pebs_update_state
Status: fixed on 2020/09/16 22:51
Reported-by: syzbot+45862e7027be5d590577@syzkaller.appspotmail.com
Fix commit: 033724d6 fbdev: Detect integer underflow at "struct fbcon_ops"->clear_margins.
First crash: 257d, last: 205d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: syz .config

Fix bisection: fixed by (bisect log) :
commit 033724d6864245a11f8e04c066002e6ad22b3fd0
Author: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date: Wed Jul 15 01:51:02 2020 +0000

  fbdev: Detect integer underflow at "struct fbcon_ops"->clear_margins.


Sample crash report:

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-kasan-gce-root 2020/05/11 02:59 upstream e99332e7 8742a2b9 .config log report syz acme@kernel.org, alexander.shishkin@linux.intel.com, bp@alien8.de, hpa@zytor.com, jolsa@redhat.com, linux-kernel@vger.kernel.org, mark.rutland@arm.com, mingo@redhat.com, namhyung@kernel.org, peterz@infradead.org, tglx@linutronix.de, x86@kernel.org