* KMSAN: uninit-value in rds_bind
@ 2018-08-30 18:31 syzbot
2018-08-30 19:30 ` Santosh Shilimkar
2018-08-30 20:56 ` Santosh Shilimkar
0 siblings, 2 replies; 4+ messages in thread
From: syzbot @ 2018-08-30 18:31 UTC (permalink / raw)
To: davem, linux-kernel, linux-rdma, netdev, rds-devel,
santosh.shilimkar, syzkaller-bugs
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=16db895a400000
kernel config: https://syzkaller.appspot.com/x/.config?x=820d6393634b55e3
dashboard link: https://syzkaller.appspot.com/bug?extid=915c9f99f3dbc4bd6cd1
compiler: clang version 8.0.0 (trunk 339414)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1137bffe400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1521a7fe400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+915c9f99f3dbc4bd6cd1@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 rds_bind+0x1f1/0x2360 net/rds/bind.c:174
CPU: 1 PID: 4497 Comm: syz-executor098 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_bind+0x1f1/0x2360 net/rds/bind.c:174
__sys_bind+0x594/0x6f0 net/socket.c:1481
__do_sys_bind net/socket.c:1492 [inline]
__se_sys_bind net/socket.c:1490 [inline]
__x64_sys_bind+0xd8/0x120 net/socket.c:1490
do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x440099
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:00007fffb43cf578 EFLAGS: 00000213 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440099
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401920
R13: 00000000004019b0 R14: 0000000000000000 R15: 0000000000000000
Local variable description: ----address@__sys_bind
Variable was created at:
__sys_bind+0x6a/0x6f0 net/socket.c:1468
__do_sys_bind net/socket.c:1492 [inline]
__se_sys_bind net/socket.c:1490 [inline]
__x64_sys_bind+0xd8/0x120 net/socket.c:1490
==================================================================
---
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
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KMSAN: uninit-value in rds_bind
2018-08-30 18:31 KMSAN: uninit-value in rds_bind syzbot
@ 2018-08-30 19:30 ` Santosh Shilimkar
2018-08-30 20:56 ` Santosh Shilimkar
1 sibling, 0 replies; 4+ messages in thread
From: Santosh Shilimkar @ 2018-08-30 19:30 UTC (permalink / raw)
To: syzbot, davem, linux-kernel, linux-rdma, netdev, rds-devel,
syzkaller-bugs
On 8/30/2018 11:31 AM, syzbot wrote:
> 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=16db895a400000
> kernel config: https://syzkaller.appspot.com/x/.config?x=820d6393634b55e3
> dashboard link:
> https://syzkaller.appspot.com/bug?extid=915c9f99f3dbc4bd6cd1
> compiler: clang version 8.0.0 (trunk 339414)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1137bffe400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1521a7fe400000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+915c9f99f3dbc4bd6cd1@syzkaller.appspotmail.com
>
OK. Will send the fix to address this.
Regards,
Santosh
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KMSAN: uninit-value in rds_bind
2018-08-30 18:31 KMSAN: uninit-value in rds_bind syzbot
2018-08-30 19:30 ` Santosh Shilimkar
@ 2018-08-30 20:56 ` Santosh Shilimkar
2018-08-30 21:05 ` Dmitry Vyukov
1 sibling, 1 reply; 4+ messages in thread
From: Santosh Shilimkar @ 2018-08-30 20:56 UTC (permalink / raw)
To: syzbot, linux-rdma, netdev, syzkaller-bugs; +Cc: davem, linux-kernel
On 8/30/2018 11:31 AM, syzbot wrote:
> 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
BTW, can you please fix your git url since this one doesn't work.
This tree is not vanila kernel.org tree(4.19.0-rc1+ #36), so would be
good to get the line numbers correct for sources.
Regards,
Snatosh
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KMSAN: uninit-value in rds_bind
2018-08-30 20:56 ` Santosh Shilimkar
@ 2018-08-30 21:05 ` Dmitry Vyukov
0 siblings, 0 replies; 4+ messages in thread
From: Dmitry Vyukov @ 2018-08-30 21:05 UTC (permalink / raw)
To: Santosh Shilimkar
Cc: syzbot, linux-rdma, netdev, syzkaller-bugs, David Miller, LKML
On Thu, Aug 30, 2018 at 1:56 PM, Santosh Shilimkar
<santosh.shilimkar@oracle.com> wrote:
> On 8/30/2018 11:31 AM, syzbot wrote:
>>
>> 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
>
>
> BTW, can you please fix your git url since this one doesn't work.
I will fix this. Thanks.
But just to unblock you, it's git repo/branch, i.e.
https://github.com/google/kmsan.git is repo, and branch is master.
> This tree is not vanila kernel.org tree(4.19.0-rc1+ #36), so would be
> good to get the line numbers correct for sources.
>
> Regards,
> Snatosh
>
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^ permalink raw reply [flat|nested] 4+ messages in thread
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2018-08-30 18:31 KMSAN: uninit-value in rds_bind syzbot
2018-08-30 19:30 ` Santosh Shilimkar
2018-08-30 20:56 ` Santosh Shilimkar
2018-08-30 21:05 ` Dmitry Vyukov
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