* KASAN: global-out-of-bounds Read in precalculate_color
@ 2019-11-28 23:55 syzbot
2019-12-18 3:11 ` syzbot
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: syzbot @ 2019-11-28 23:55 UTC (permalink / raw)
To: hverkuil-cisco, linux-kernel, linux-media, mchehab,
syzkaller-bugs, vivek.kasireddy
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:
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syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: KASAN: global-out-of-bounds Read in precalculate_color 2019-11-28 23:55 KASAN: global-out-of-bounds Read in precalculate_color syzbot @ 2019-12-18 3:11 ` syzbot 2019-12-26 18:59 ` syzbot 2020-08-12 1:07 ` syzbot 2 siblings, 0 replies; 4+ messages in thread From: syzbot @ 2019-12-18 3:11 UTC (permalink / raw) To: davem, ericvh, hverkuil-cisco, linux-kernel, linux-media, lucho, mchehab, netdev, rminnich, syzkaller-bugs, v9fs-developer, viro, vivek.kasireddy syzbot has bisected this bug to: commit 7594bf37ae9ffc434da425120c576909eb33b0bc Author: Al Viro <viro@zeniv.linux.org.uk> Date: Mon Jul 17 02:53:08 2017 +0000 9p: untangle ->poll() mess bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15e323a6e00000 start 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=13e323a6e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=121b4285bac421fe dashboard link: https://syzkaller.appspot.com/bug?extid=02d9172bf4c43104cd70 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=119c517ae00000 Reported-by: syzbot+02d9172bf4c43104cd70@syzkaller.appspotmail.com Fixes: 7594bf37ae9f ("9p: untangle ->poll() mess") For information about bisection process see: https://goo.gl/tpsmEJ#bisection ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: global-out-of-bounds Read in precalculate_color 2019-11-28 23:55 KASAN: global-out-of-bounds Read in precalculate_color syzbot 2019-12-18 3:11 ` syzbot @ 2019-12-26 18:59 ` syzbot 2020-08-12 1:07 ` syzbot 2 siblings, 0 replies; 4+ messages in thread From: syzbot @ 2019-12-26 18:59 UTC (permalink / raw) To: davem, ericvh, hverkuil-cisco, linux-kernel, linux-media, lucho, mchehab, netdev, rminnich, syzkaller-bugs, v9fs-developer, viro, vivek.kasireddy syzbot has found a reproducer for the following crash on: HEAD commit: 46cf053e Linux 5.5-rc3 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11932ce1e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=ed9d672709340e35 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=14861a49e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1794423ee00000 The bug was bisected to: commit 7594bf37ae9ffc434da425120c576909eb33b0bc Author: Al Viro <viro@zeniv.linux.org.uk> Date: Mon Jul 17 02:53:08 2017 +0000 9p: untangle ->poll() mess bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15e323a6e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13e323a6e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+02d9172bf4c43104cd70@syzkaller.appspotmail.com Fixes: 7594bf37ae9f ("9p: untangle ->poll() mess") ================================================================== 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 ffffffff88b3d3f9 by task vivid-000-vid-c/9278 CPU: 0 PID: 9278 Comm: vivid-000-vid-c Not tainted 5.5.0-rc3-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:639 __asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:132 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: kbd_keycodes+0x119/0x760 Memory state around the buggy address: ffffffff88b3d280: fa fa fa fa 00 00 04 fa fa fa fa fa 00 00 00 00 ffffffff88b3d300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffffffff88b3d380: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa ^ ffffffff88b3d400: 00 00 00 00 07 fa fa fa fa fa fa fa 00 00 00 00 ffffffff88b3d480: 00 fa fa fa fa fa fa fa 02 fa fa fa fa fa fa fa ================================================================== ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: global-out-of-bounds Read in precalculate_color 2019-11-28 23:55 KASAN: global-out-of-bounds Read in precalculate_color syzbot 2019-12-18 3:11 ` syzbot 2019-12-26 18:59 ` syzbot @ 2020-08-12 1:07 ` syzbot 2 siblings, 0 replies; 4+ messages in thread From: syzbot @ 2020-08-12 1:07 UTC (permalink / raw) To: a.darwish, akpm, bsegall, changbin.du, clang-built-linux, davem, dietmar.eggemann, dvyukov, elver, ericvh, hverkuil-cisco, jpa, juri.lelli, kasan-dev, keescook, linux-kbuild, linux-kernel, linux-media, linux-sparse, luc.vanoostenryck, lucho, mark.rutland, masahiroy, mchehab, mgorman, mhiramat, michal.lkml, miguel.ojeda.sandonis, mingo, netdev, paulmck, peterz, rminnich, rostedt, rppt, samitolvanen, syzkaller-bugs, tglx, v9fs-developer, vincent.guittot, viro, vivek.kasireddy, will, yepeilin.cs syzbot suspects this issue was fixed by commit: commit dfd402a4c4baae42398ce9180ff424d589b8bffc Author: Marco Elver <elver@google.com> Date: Thu Nov 14 18:02:54 2019 +0000 kcsan: Add Kernel Concurrency Sanitizer infrastructure bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13eb65d6900000 start commit: 46cf053e Linux 5.5-rc3 git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=ed9d672709340e35 dashboard link: https://syzkaller.appspot.com/bug?extid=02d9172bf4c43104cd70 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=147e5ac1e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14b49e71e00000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: kcsan: Add Kernel Concurrency Sanitizer infrastructure For information about bisection process see: https://goo.gl/tpsmEJ#bisection ^ permalink raw reply [flat|nested] 4+ messages in thread
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