syzbot


KASAN: global-out-of-bounds Read in fbcon_get_font
Status: fixed on 2020/11/16 12:12
Reported-by: syzbot+29d4ed7f3bdedf2aa2fd@syzkaller.appspotmail.com
Fix commit: 5af08640795b fbcon: Fix global-out-of-bounds read in fbcon_get_font()
First crash: 721d, last: 423d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: KASAN: global-out-of-bounds Read in fbcon_get_font (log)
Repro: syz .config

Fix bisection: the fix commit could be any of (bisect log):
  4557ac6b344b powerpc/64s/exception: Fix 0x1500 interrupt handler crash
  997c4431f04d Merge tag 'powerpc-5.8-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 KASAN: global-out-of-bounds Read in fbcon_get_font C done 47 416d 727d 1/1 fixed on 2020/11/10 07:26
linux-4.14 KASAN: global-out-of-bounds Read in fbcon_get_font C done 42 411d 727d 1/1 fixed on 2020/11/13 22:55
Patch testing requests:
Created Duration User Patch Repo Result
2020/09/23 14:42 18m yepeilin.cs@gmail.com patch upstream OK
2020/09/23 12:12 9m yepeilin.cs@gmail.com upstream report log
2020/09/23 10:11 3m yepeilin.cs@gmail.com patch upstream error
2020/09/17 03:52 17m yepeilin.cs@gmail.com patch upstream OK
2020/09/16 16:47 17m yepeilin.cs@gmail.com patch upstream report log
2020/08/07 06:27 17m yepeilin.cs@gmail.com patch upstream OK

Sample crash report:

Crashes (41):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2020/05/11 17:30 upstream 2ef96a5bb12b f8f57555 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2020/04/24 19:46 upstream b4f633221f0a 03d97a1b .config log report syz C
ci-upstream-kasan-gce-root 2020/01/01 17:50 upstream 738d2902773e 25a0186e .config log report syz C
ci-upstream-kasan-gce-selinux-root 2020/01/01 17:39 upstream 738d2902773e 25a0186e .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/05/11 15:53 linux-next ac935d227366 f8f57555 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/01/08 03:51 linux-next 264673852033 6738e0b3 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2019/12/10 16:44 upstream 6794862a16ef 5a5826a1 .config log report syz
ci-upstream-kasan-gce-root 2019/12/10 10:29 upstream 6794862a16ef 4b83c8fb .config log report syz
ci-upstream-linux-next-kasan-gce-root 2019/12/22 16:40 linux-next 7ddd09fc4b74 8b967267 .config log report syz
ci-upstream-linux-next-kasan-gce-root 2019/12/09 23:33 linux-next 6cf8298daad0 b31eda3d .config log report syz
ci-upstream-kasan-gce-root 2020/10/02 04:20 upstream fcadab740480 9602ddf4 .config log report info
ci-upstream-kasan-gce-root 2020/08/12 23:20 upstream fb893de323e2 bc15f7db .config log report
ci-upstream-kasan-gce-root 2020/08/12 12:16 upstream c636eef2ee36 bb3e5fe6 .config log report
ci-upstream-kasan-gce-selinux-root 2020/08/10 08:36 upstream 9420f1ce0186 70301872 .config log report
ci-upstream-kasan-gce-root 2020/08/06 04:18 upstream fffe3ae0ee84 0487ea6f .config log report
ci-upstream-kasan-gce-root 2020/08/02 11:52 upstream ac3a0c847296 63a73341 .config log report
ci-upstream-kasan-gce-root 2020/07/25 10:28 upstream 68845a55c31b 1f7cc1ca .config log report
ci-upstream-kasan-gce-root 2020/07/21 11:30 upstream 4fa640dc5230 d88894e6 .config log report
ci-upstream-kasan-gce-root 2020/07/20 19:24 upstream 5714ee50bb43 4285ffa3 .config log report
ci-upstream-kasan-gce-root 2020/07/17 05:58 upstream f8456690ba8e 54b3c45e .config log report
ci-upstream-kasan-gce-root 2020/06/21 07:56 upstream 7ae77150d94d c655ec77 .config log report
ci-upstream-kasan-gce-selinux-root 2020/05/23 19:53 upstream 444565650a5f 9682898d .config log report
ci-upstream-kasan-gce-root 2020/04/29 13:53 upstream 96c9a7802af7 496a08ae .config log report
ci-upstream-kasan-gce-root 2020/04/27 22:52 upstream 51184ae37e05 0ce7569e .config log report
ci-upstream-kasan-gce-selinux-root 2020/02/04 15:59 upstream 322bf2d3446a 93e5e335 .config log report
ci-upstream-kasan-gce-root 2020/01/31 22:23 upstream ccaaaf6fe5a5 c30117b2 .config log report
ci-upstream-kasan-gce-selinux-root 2020/01/30 03:50 upstream b3a608222336 5ed23f9a .config log report
ci-upstream-kasan-gce-selinux-root 2020/01/15 13:56 upstream 95e20af9fb9c fa12bd3c .config log report
ci-upstream-kasan-gce-selinux-root 2020/01/13 06:23 upstream 040a3c33623b 53faa9fe .config log report
ci-qemu-upstream 2020/01/13 03:43 upstream 040a3c33623b 53faa9fe .config log report
ci-upstream-kasan-gce-root 2020/01/12 22:00 upstream 6327edceb62b 31290a45 .config log report
ci-upstream-kasan-gce-root 2020/01/12 13:32 upstream 6327edceb62b 31290a45 .config log report
ci-upstream-kasan-gce-root 2020/01/10 00:34 upstream b07f636fca1c 4de4e9f0 .config log report
ci-upstream-kasan-gce-root 2019/12/13 13:27 upstream ae4b064e2a61 08003f64 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/07/12 06:52 linux-next d31958b30ea3 115e1930 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/06/11 00:59 linux-next e7b08814b16b a6f7998d .config log report
ci-upstream-linux-next-kasan-gce-root 2020/04/27 19:22 linux-next ac935d227366 0ce7569e .config log report
ci-upstream-linux-next-kasan-gce-root 2020/04/17 00:47 linux-next ac935d227366 c743fcb3 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/03/18 10:46 linux-next 770fbb32d34e 97bc55ce .config log report
ci-upstream-linux-next-kasan-gce-root 2020/03/02 01:44 linux-next c99b17ac0399 c88c7b75 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/02/18 13:00 linux-next c25a951c50dc 1ce142dc .config log report