From: syzbot <syzbot+02d9172bf4c43104cd70@syzkaller.appspotmail.com>
To: hverkuil-cisco@xs4all.nl, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, mchehab@kernel.org,
syzkaller-bugs@googlegroups.com, vivek.kasireddy@intel.com
Subject: KASAN: global-out-of-bounds Read in precalculate_color
Date: Thu, 28 Nov 2019 15:55:06 -0800 [thread overview]
Message-ID: <000000000000b6b450059870d703@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: d7688697 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=125118a2e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=121b4285bac421fe
dashboard link: https://syzkaller.appspot.com/bug?extid=02d9172bf4c43104cd70
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=119c517ae00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+02d9172bf4c43104cd70@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: global-out-of-bounds in precalculate_color+0x2154/0x2480
drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:942
Read of size 1 at addr ffffffff884787bf by task vivid-000-vid-c/8948
CPU: 1 PID: 8948 Comm: vivid-000-vid-c Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x197/0x210 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:634
__asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:129
precalculate_color+0x2154/0x2480
drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:942
tpg_precalculate_colors drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:1093
[inline]
tpg_recalc+0x561/0x2850 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2118
tpg_calc_text_basep+0xa1/0x290
drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2136
vivid_fillbuff+0x1a5f/0x3af0
drivers/media/platform/vivid/vivid-kthread-cap.c:466
vivid_thread_vid_cap_tick+0x8cf/0x2210
drivers/media/platform/vivid/vivid-kthread-cap.c:727
vivid_thread_vid_cap+0x5d8/0xa60
drivers/media/platform/vivid/vivid-kthread-cap.c:866
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
The buggy address belongs to the variable:
sin+0x17f/0x280
Memory state around the buggy address:
ffffffff88478680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffff88478700: 00 00 00 00 00 00 00 00 01 fa fa fa fa fa fa fa
> ffffffff88478780: 00 00 06 fa fa fa fa fa 04 fa fa fa fa fa fa fa
^
ffffffff88478800: 05 fa fa fa fa fa fa fa 05 fa fa fa fa fa fa fa
ffffffff88478880: 00 00 fa fa fa fa fa fa 00 00 00 00 00 00 fa fa
==================================================================
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2019-11-28 23:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-28 23:55 syzbot [this message]
2019-12-18 3:11 ` KASAN: global-out-of-bounds Read in precalculate_color syzbot
2019-12-26 18:59 ` syzbot
2020-08-12 1:07 ` syzbot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=000000000000b6b450059870d703@google.com \
--to=syzbot+02d9172bf4c43104cd70@syzkaller.appspotmail.com \
--cc=hverkuil-cisco@xs4all.nl \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=mchehab@kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
--cc=vivek.kasireddy@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.