From: syzbot <syzbot+885bda95271928dc24eb@syzkaller.appspotmail.com>
To: keescook@chromium.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, syzkaller-bugs@googlegroups.com
Subject: kernel BUG at mm/slab.c:LINE! (2)
Date: Sun, 08 Jul 2018 23:16:02 -0700 [thread overview]
Message-ID: <000000000000afa87d05708af289@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: d90c936fb318 Merge branch 'bpf-nfp-mul-div-support'
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15cf4f48400000
kernel config: https://syzkaller.appspot.com/x/.config?x=a501a01deaf0fe9
dashboard link: https://syzkaller.appspot.com/bug?extid=885bda95271928dc24eb
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=15c87748400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1459050c400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+885bda95271928dc24eb@syzkaller.appspotmail.com
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
------------[ cut here ]------------
kernel BUG at mm/slab.c:4421!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 0 PID: 4467 Comm: syz-executor607 Not tainted 4.18.0-rc3+ #48
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__check_heap_object+0xa7/0xb5 mm/slab.c:4446
Code: 48 c7 c7 90 73 c0 88 e8 87 7a 08 00 5d c3 41 8b 91 04 01 00 00 48 29
c7 48 39 d7 77 be 48 01 d0 48 29 c8 48 39 f0 72 b3 5d c3 <0f> 0b 48 c7 c7
90 73 c0 88 e8 6d 81 08 00 44 89 e1 4c 8d 45 c4 48
RSP: 0018:ffff8801ab117a10 EFLAGS: 00010246
RAX: 0000000000000006 RBX: 1ffff10035622f49 RCX: 0000000000000009
RDX: ffff8801c27ff000 RSI: 00000000000003d2 RDI: ffff8801c27ffff2
RBP: ffff8801ab117a10 R08: ffff8801ab37a680 R09: ffff8801da800940
R10: 0000000000000991 R11: 0000000000000001 R12: ffff8801c27ffff2
R13: 00000000000003d2 R14: 0000000000000001 R15: ffffea000709ffc0
FS: 0000000000763880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000200 CR3: 00000001b0a8b000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_heap_object mm/usercopy.c:236 [inline]
__check_object_size+0x4db/0x5f2 mm/usercopy.c:259
check_object_size include/linux/thread_info.h:119 [inline]
check_copy_size include/linux/thread_info.h:150 [inline]
copy_to_user include/linux/uaccess.h:154 [inline]
bpf_test_finish.isra.7+0xd9/0x1f0 net/bpf/test_run.c:59
bpf_prog_test_run_skb+0x7d7/0xa30 net/bpf/test_run.c:144
bpf_prog_test_run+0x130/0x1a0 kernel/bpf/syscall.c:1686
__do_sys_bpf kernel/bpf/syscall.c:2323 [inline]
__se_sys_bpf kernel/bpf/syscall.c:2267 [inline]
__x64_sys_bpf+0x3d8/0x510 kernel/bpf/syscall.c:2267
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4402d9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff168c6558 EFLAGS: 00000213 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402d9
RDX: 0000000000000028 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401b60
R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
(ftrace buffer empty)
---[ end trace 045402f983996608 ]---
RIP: 0010:__check_heap_object+0xa7/0xb5 mm/slab.c:4446
Code: 48 c7 c7 90 73 c0 88 e8 87 7a 08 00 5d c3 41 8b 91 04 01 00 00 48 29
c7 48 39 d7 77 be 48 01 d0 48 29 c8 48 39 f0 72 b3 5d c3 <0f> 0b 48 c7 c7
90 73 c0 88 e8 6d 81 08 00 44 89 e1 4c 8d 45 c4 48
RSP: 0018:ffff8801ab117a10 EFLAGS: 00010246
RAX: 0000000000000006 RBX: 1ffff10035622f49 RCX: 0000000000000009
RDX: ffff8801c27ff000 RSI: 00000000000003d2 RDI: ffff8801c27ffff2
RBP: ffff8801ab117a10 R08: ffff8801ab37a680 R09: ffff8801da800940
R10: 0000000000000991 R11: 0000000000000001 R12: ffff8801c27ffff2
R13: 00000000000003d2 R14: 0000000000000001 R15: ffffea000709ffc0
FS: 0000000000763880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000200 CR3: 00000001b0a8b000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
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.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2018-07-09 6:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-09 6:16 syzbot [this message]
2018-07-09 16:05 ` kernel BUG at mm/slab.c:LINE! (2) Christopher Lameter
2018-07-09 16:16 ` Dmitry Vyukov
2018-07-09 16:30 ` Daniel Borkmann
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=000000000000afa87d05708af289@google.com \
--to=syzbot+885bda95271928dc24eb@syzkaller.appspotmail.com \
--cc=keescook@chromium.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.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.