From: syzbot <syzbot+2a831e062bb4aebd8755@syzkaller.appspotmail.com>
To: axboe@kernel.dk, bart.vanassche@wdc.com, davem@davemloft.net,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
sagi@grimberg.me, syzkaller-bugs@googlegroups.com
Subject: general protection fault in in_aton
Date: Tue, 10 Jul 2018 12:19:03 -0700 [thread overview]
Message-ID: <000000000000c242e90570aa0062@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 092150a25cb7 Merge branch 'for-linus' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1687b168400000
kernel config: https://syzkaller.appspot.com/x/.config?x=25856fac4e580aa7
dashboard link: https://syzkaller.appspot.com/bug?extid=2a831e062bb4aebd8755
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
userspace arch: i386
syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=158cc2c2400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16e7ef48400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+2a831e062bb4aebd8755@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)
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
CPU: 0 PID: 4524 Comm: syz-executor617 Not tainted 4.18.0-rc4+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:in_aton+0x3e/0x180 net/core/utils.c:63
Code: f6 41 55 41 54 49 89 fc 53 48 83 ec 08 c7 45 d4 00 00 00 00 e8 a3 a5
7c fb 4c 89 e0 4c 89 e2 c1 65 d4 08 48 c1 e8 03 83 e2 07 <42> 0f b6 04 38
38 d0 7f 08 84 c0 0f 85 1a 01 00 00 41 0f be 1c 24
RSP: 0018:ffff8801a8f171a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801acc613a4 RCX: ffffffff87685d49
RDX: 0000000000000000 RSI: ffffffff85ff65fd RDI: 0000000000000000
RBP: ffff8801a8f171d0 R08: ffff8801ac928040 R09: ffffed00351e2df9
R10: ffffed00351e2df9 R11: 0000000000000003 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:000000000961b840
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020000140 CR3: 00000001ac93c000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rdma_create_trans+0xdbe/0x1ed0 net/9p/trans_rdma.c:678
p9_client_create+0x915/0x16c9 net/9p/client.c:1062
v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400
v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135
mount_fs+0xae/0x328 fs/super.c:1277
vfs_kern_mount.part.34+0xdc/0x4e0 fs/namespace.c:1037
vfs_kern_mount fs/namespace.c:1027 [inline]
do_new_mount fs/namespace.c:2518 [inline]
do_mount+0x581/0x30e0 fs/namespace.c:2848
__do_compat_sys_mount fs/compat.c:125 [inline]
__se_compat_sys_mount fs/compat.c:92 [inline]
__ia32_compat_sys_mount+0x5d5/0x860 fs/compat.c:92
do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f65cb9
Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b
5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90
90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000ffb9d3bc EFLAGS: 00000282 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000200000c0
RDX: 0000000020000340 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
(ftrace buffer empty)
---[ end trace 5db7de5a7d39bf0a ]---
RIP: 0010:in_aton+0x3e/0x180 net/core/utils.c:63
Code: f6 41 55 41 54 49 89 fc 53 48 83 ec 08 c7 45 d4 00 00 00 00 e8 a3 a5
7c fb 4c 89 e0 4c 89 e2 c1 65 d4 08 48 c1 e8 03 83 e2 07 <42> 0f b6 04 38
38 d0 7f 08 84 c0 0f 85 1a 01 00 00 41 0f be 1c 24
RSP: 0018:ffff8801a8f171a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801acc613a4 RCX: ffffffff87685d49
RDX: 0000000000000000 RSI: ffffffff85ff65fd RDI: 0000000000000000
RBP: ffff8801a8f171d0 R08: ffff8801ac928040 R09: ffffed00351e2df9
R10: ffffed00351e2df9 R11: 0000000000000003 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:000000000961b840
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020000140 CR3: 00000001ac93c000 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:[~2018-07-10 19:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-10 19:19 syzbot [this message]
2018-07-10 19:44 ` general protection fault in in_aton Linus Torvalds
2018-07-10 19:56 ` Dmitry Vyukov
2018-07-10 20:15 ` Linus Torvalds
2018-07-11 16:47 ` 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=000000000000c242e90570aa0062@google.com \
--to=syzbot+2a831e062bb4aebd8755@syzkaller.appspotmail.com \
--cc=axboe@kernel.dk \
--cc=bart.vanassche@wdc.com \
--cc=davem@davemloft.net \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=sagi@grimberg.me \
--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;
as well as URLs for NNTP newsgroup(s).