From: syzbot <syzbot+3d04999521633dceb439@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: KASAN: slab-out-of-bounds Read in class_equal
Date: Sat, 25 May 2019 10:38:05 -0700 [thread overview]
Message-ID: <00000000000016cb560589b9c7c4@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: af5136f9 selftests/net: SO_TXTIME with ETF and FQ
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13164ee4a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=fc045131472947d7
dashboard link: https://syzkaller.appspot.com/bug?extid=3d04999521633dceb439
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1661b6e4a00000
Bisection is inconclusive: the first bad commit could be any of:
7c00e8ae Merge tag 'armsoc-soc' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
a2b7ab45 Merge tag 'linux-watchdog-4.18-rc1' of
git://www.linux-watchdog.org/linux-watchdog
721afaa2 Merge tag 'armsoc-dt' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1062daaaa00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+3d04999521633dceb439@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in class_equal+0x40/0x50
kernel/locking/lockdep.c:1527
Read of size 8 at addr ffff8880813cdab0 by task syz-executor.0/9147
CPU: 0 PID: 9147 Comm: syz-executor.0 Not tainted 5.2.0-rc1+ #6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
Allocated by task 2266519551:
------------[ cut here ]------------
kernel BUG at mm/slab.c:4178!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9147 Comm: syz-executor.0 Not tainted 5.2.0-rc1+ #6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__check_heap_object+0xa5/0xb3 mm/slab.c:4178
Code: 2b 48 c7 c7 4d fc 61 88 e8 28 ad 07 00 5d c3 41 8b 91 04 01 00 00 48
29 c7 48 39 d7 77 bd 48 01 d0 48 29 c8 4c 39 c0 72 b2 c3 <0f> 0b 48 c7 c7
4d fc 61 88 e8 3c b2 07 00 44 89 e1 48 c7 c7 08 fd
RSP: 0018:ffff8880813cd370 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 000000000000000c
RDX: ffff8880813cc340 RSI: 0000000000000000 RDI: ffff8880813cd468
RBP: ffff8880813cd3c0 R08: 0000000000000001 R09: ffff8880aa594c40
R10: 0000000000000f23 R11: 0000000000000000 R12: ffff8880813cd468
R13: ffffea000204f300 R14: ffff8880813cd469 R15: 0000000000000001
FS: 00005555564e1940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c046bd8 CR3: 000000009a952000 CR4: 00000000001406f0
Call Trace:
Modules linked in:
---[ end trace e78aeeb619bc791b ]---
RIP: 0010:__check_heap_object+0xa5/0xb3 mm/slab.c:4178
Code: 2b 48 c7 c7 4d fc 61 88 e8 28 ad 07 00 5d c3 41 8b 91 04 01 00 00 48
29 c7 48 39 d7 77 bd 48 01 d0 48 29 c8 4c 39 c0 72 b2 c3 <0f> 0b 48 c7 c7
4d fc 61 88 e8 3c b2 07 00 44 89 e1 48 c7 c7 08 fd
RSP: 0018:ffff8880813cd370 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 000000000000000c
RDX: ffff8880813cc340 RSI: 0000000000000000 RDI: ffff8880813cd468
RBP: ffff8880813cd3c0 R08: 0000000000000001 R09: ffff8880aa594c40
R10: 0000000000000f23 R11: 0000000000000000 R12: ffff8880813cd468
R13: ffffea000204f300 R14: ffff8880813cd469 R15: 0000000000000001
FS: 00005555564e1940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c046bd8 CR3: 000000009a952000 CR4: 00000000001406f0
---
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.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2019-05-25 17:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-25 17:38 syzbot [this message]
2019-05-26 6:39 ` KASAN: slab-out-of-bounds Read in class_equal 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=00000000000016cb560589b9c7c4@google.com \
--to=syzbot+3d04999521633dceb439@syzkaller.appspotmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--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 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.