From: syzbot <syzbot+0049bebbf3042dbd2e8f@syzkaller.appspotmail.com>
To: davem@davemloft.net, linux-kernel@vger.kernel.org,
linux-rdma@vger.kernel.org, netdev@vger.kernel.org,
rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com,
syzkaller-bugs@googlegroups.com
Subject: KMSAN: uninit-value in rds_connect
Date: Thu, 30 Aug 2018 11:31:03 -0700 [thread overview]
Message-ID: <00000000000005859b0574ab47e5@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 2dca2cbde67a kmsan: fix build warnings with CONFIG_KMSAN=n
git tree: https://github.com/google/kmsan.git/master
console output: https://syzkaller.appspot.com/x/log.txt?x=1519734a400000
kernel config: https://syzkaller.appspot.com/x/.config?x=820d6393634b55e3
dashboard link: https://syzkaller.appspot.com/bug?extid=0049bebbf3042dbd2e8f
compiler: clang version 8.0.0 (trunk 339414)
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+0049bebbf3042dbd2e8f@syzkaller.appspotmail.com
RDX: 0000000000000000 RSI: 0000000020000380 RDI: 00000000000001ff
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00000000004cd2e8 R14: 00000000004c3d93 R15: 0000000000000003
==================================================================
BUG: KMSAN: uninit-value in rds_connect+0x213/0x950 net/rds/af_rds.c:511
CPU: 0 PID: 8117 Comm: syz-executor6 Not tainted 4.19.0-rc1+ #36
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+0x14b/0x190 lib/dump_stack.c:113
kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956
__msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645
rds_connect+0x213/0x950 net/rds/af_rds.c:511
__sys_connect+0x64e/0x750 net/socket.c:1662
__do_sys_connect net/socket.c:1673 [inline]
__se_sys_connect net/socket.c:1670 [inline]
__x64_sys_connect+0xd8/0x120 net/socket.c:1670
do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457089
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f7090fc1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f7090fc26d4 RCX: 0000000000457089
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cb710 R14: 00000000004c320b R15: 0000000000000000
Local variable description: ----address@__sys_connect
Variable was created at:
__sys_connect+0x6a/0x750 net/socket.c:1645
__do_sys_connect net/socket.c:1673 [inline]
__se_sys_connect net/socket.c:1670 [inline]
__x64_sys_connect+0xd8/0x120 net/socket.c:1670
==================================================================
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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next reply other threads:[~2018-08-30 22:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-30 18:31 syzbot [this message]
2018-08-30 19:30 ` KMSAN: uninit-value in rds_connect Santosh Shilimkar
2018-08-31 1:25 ` syzbot
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