From: syzbot <syzbot+23b5f9e7caf61d9a3898@syzkaller.appspotmail.com>
To: coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de,
horms@verge.net.au, ja@ssi.bg, kadlec@blackhole.kfki.hu,
linux-kernel@vger.kernel.org, lvs-devel@vger.kernel.org,
netdev@vger.kernel.org, netfilter-devel@vger.kernel.org,
pablo@netfilter.org, syzkaller-bugs@googlegroups.com,
wensong@linux-vs.org
Subject: KMSAN: uninit-value in do_ip_vs_set_ctl
Date: Fri, 14 Sep 2018 11:23:04 -0700 [thread overview]
Message-ID: <00000000000015a13b0575d8eae8@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 06b2df0593a8 kmsan: unpoison only the created pages in get..
git tree: https://github.com/google/kmsan.git/master
console output: https://syzkaller.appspot.com/x/log.txt?x=11a6ae37800000
kernel config: https://syzkaller.appspot.com/x/.config?x=4ca1e57bafa8ab1f
dashboard link: https://syzkaller.appspot.com/bug?extid=23b5f9e7caf61d9a3898
compiler: clang version 7.0.0 (trunk 329391)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14008417800000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11deb017800000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+23b5f9e7caf61d9a3898@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)
==================================================================
BUG: KMSAN: uninit-value in do_ip_vs_set_ctl+0x15ac/0x2760
net/netfilter/ipvs/ip_vs_ctl.c:2424
CPU: 1 PID: 4464 Comm: syz-executor844 Not tainted 4.17.0-rc3+ #94
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+0x185/0x1d0 lib/dump_stack.c:113
kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1084
__msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683
do_ip_vs_set_ctl+0x15ac/0x2760 net/netfilter/ipvs/ip_vs_ctl.c:2424
nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
nf_setsockopt+0x476/0x4d0 net/netfilter/nf_sockopt.c:115
ip_setsockopt+0x24b/0x2b0 net/ipv4/ip_sockglue.c:1253
raw_setsockopt+0x2e5/0x350 net/ipv4/raw.c:868
sock_common_setsockopt+0x136/0x170 net/core/sock.c:3039
__sys_setsockopt+0x4af/0x560 net/socket.c:1903
__do_sys_setsockopt net/socket.c:1914 [inline]
__se_sys_setsockopt net/socket.c:1911 [inline]
__x64_sys_setsockopt+0x15c/0x1c0 net/socket.c:1911
do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x43fca9
RSP: 002b:00007fff7a4795b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fca9
RDX: 0000000000000480 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004015d0
R13: 0000000000401660 R14: 0000000000000000 R15: 0000000000000000
Local variable description: ----arg@do_ip_vs_set_ctl
Variable was created at:
read_pnet include/net/net_namespace.h:288 [inline]
sock_net include/net/sock.h:2306 [inline]
do_ip_vs_set_ctl+0x93/0x2760 net/netfilter/ipvs/ip_vs_ctl.c:2347
nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
nf_setsockopt+0x476/0x4d0 net/netfilter/nf_sockopt.c:115
==================================================================
---
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
reply other threads:[~2018-09-14 18:23 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=00000000000015a13b0575d8eae8@google.com \
--to=syzbot+23b5f9e7caf61d9a3898@syzkaller.appspotmail.com \
--cc=coreteam@netfilter.org \
--cc=davem@davemloft.net \
--cc=fw@strlen.de \
--cc=horms@verge.net.au \
--cc=ja@ssi.bg \
--cc=kadlec@blackhole.kfki.hu \
--cc=linux-kernel@vger.kernel.org \
--cc=lvs-devel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=pablo@netfilter.org \
--cc=syzkaller-bugs@googlegroups.com \
--cc=wensong@linux-vs.org \
/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;
as well as URLs for NNTP newsgroup(s).