syzbot


KASAN: use-after-free Read in soft_cursor
Status: fixed on 2020/10/26 21:28
Reported-by: syzbot+78f3eb4775da1505c7e6@syzkaller.appspotmail.com
Fix commit: 76fe9298 fbcon: Fix user font detection test at fbcon_resize().
First crash: 528d, last: 231d

Fix bisection: fixed by (bisect log) :
commit 76fe92986c5c2fff36d8fb83e86332113b6c1725
Author: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date: Thu Sep 10 22:57:06 2020 +0000

  fbcon: Fix user font detection test at fbcon_resize().

similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: use-after-free Read in soft_cursor C done inconclusive 12 249d 526d 0/22 upstream: reported C repro on 2019/12/06 12:25
linux-4.19 KASAN: use-after-free Read in soft_cursor (2) 2 139d 177d 0/1 auto-closed as invalid on 2021/04/26 05:01
linux-4.14 KASAN: use-after-free Read in soft_cursor C inconclusive 7 17d 528d 0/1 upstream: reported C repro on 2019/12/04 13:11

Sample crash report:

Crashes (16):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-19 2019/12/04 12:14 linux-4.19.y 174651bd 0ecb9746 .config log report syz C
ci2-linux-4-19 2020/09/26 11:58 linux-4.19.y d09b8017 2d5ea0cb .config log report info
ci2-linux-4-19 2020/09/24 03:04 linux-4.19.y d09b8017 54289b08 .config log report info
ci2-linux-4-19 2020/07/31 17:40 linux-4.19.y 13af6c74 8df85ed9 .config log report
ci2-linux-4-19 2020/05/18 22:50 linux-4.19.y 258f0cf7 684d3606 .config log report
ci2-linux-4-19 2020/05/06 01:39 linux-4.19.y fdc07232 35b8eb30 .config log report
ci2-linux-4-19 2020/04/25 19:31 linux-4.19.y 7edd66cf a113ba38 .config log report
ci2-linux-4-19 2020/03/21 19:04 linux-4.19.y 14cfdbd3 78267cec .config log report
ci2-linux-4-19 2020/03/15 02:19 linux-4.19.y 56920971 749688d2 .config log report
ci2-linux-4-19 2020/03/14 05:28 linux-4.19.y 56920971 749688d2 .config log report
ci2-linux-4-19 2020/02/26 03:21 linux-4.19.y f25804f3 4f588111 .config log report
ci2-linux-4-19 2020/01/27 08:42 linux-4.19.y d183c8e2 dd56146d .config log report
ci2-linux-4-19 2019/12/28 17:28 linux-4.19.y 672481c2 af6b8ef8 .config log report
ci2-linux-4-19 2019/12/25 06:46 linux-4.19.y 672481c2 be5c2c81 .config log report
ci2-linux-4-19 2019/12/19 08:15 linux-4.19.y 7d120bf2 79b211f7 .config log report
ci2-linux-4-19 2019/12/09 14:51 linux-4.19.y fb683b5e b31eda3d .config log report