From: syzbot <syzbot+cadaa9a49085b3cc83d3@syzkaller.appspotmail.com>
To: akpm@linux-foundation.org, arjan@linux.intel.com,
josh@joshtriplett.org, linux-kernel@vger.kernel.org,
mingo@kernel.org, paulmck@linux.vnet.ibm.com,
syzkaller-bugs@googlegroups.com
Subject: KASAN: stack-out-of-bounds Write in notify_die
Date: Sat, 26 May 2018 02:13:01 -0700 [thread overview]
Message-ID: <0000000000009b811c056d184aa8@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 203ec2fed17a Merge tag 'armsoc-fixes' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14feff97800000
kernel config: https://syzkaller.appspot.com/x/.config?x=f3b4e30da84ec1ed
dashboard link: https://syzkaller.appspot.com/bug?extid=cadaa9a49085b3cc83d3
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+cadaa9a49085b3cc83d3@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: stack-out-of-bounds in notify_die+0x291/0x2b0
kernel/notifier.c:539
Write of size 8 at addr ffff8801c74d7258 by task syz-executor7/17787
CPU: 1 PID: 17787 Comm: syz-executor7 Not tainted 4.17.0-rc5+ #60
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+0x1b9/0x294 lib/dump_stack.c:113
print_address_description+0x6c/0x20b mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
__asan_report_store8_noabort+0x17/0x20 mm/kasan/report.c:438
notify_die+0x291/0x2b0 kernel/notifier.c:539
do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:558
general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1159
RIP: 0010:msr_write_intercepted arch/x86/kvm/vmx.c:2132 [inline]
RIP: 0010:vmx_vcpu_run+0xa2f/0x25f0 arch/x86/kvm/vmx.c:9871
RSP: 0018:ffff8801c74d73b0 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000010000000 RCX: ffffffff811f778f
RDX: 000000000836b156 RSI: ffffffff811f779c RDI: 0000000000000005
RBP: ffff8801c74d7898 R08: ffff8801ab74e140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
The buggy address belongs to the page:
page:ffffea00071d35c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x2fffc0000000000()
raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 ffffea00071d0101 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8801c74d7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8801c74d7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffff8801c74d7200: 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 f3 f3
^
ffff8801c74d7280: f3 f3 00 f2 f2 f2 f2 f2 f2 f2 00 00 f2 f2 f3 f3
ffff8801c74d7300: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
---
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#bug-status-tracking for how to communicate with
syzbot.
next reply other threads:[~2018-05-26 9:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-26 9:13 syzbot [this message]
2018-05-26 9:26 ` Dmitry Vyukov
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=0000000000009b811c056d184aa8@google.com \
--to=syzbot+cadaa9a49085b3cc83d3@syzkaller.appspotmail.com \
--cc=akpm@linux-foundation.org \
--cc=arjan@linux.intel.com \
--cc=josh@joshtriplett.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=paulmck@linux.vnet.ibm.com \
--cc=syzkaller-bugs@googlegroups.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®