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alpine-devel

Re: [alpine-devel] Bug in rpc.mountd

From: alex M <lonkaji_at_gmail.com>
Date: Mon, 21 May 2012 16:47:47 +0200

Hi,

I answered only to you, so I repost it to the ml.

bei:~# apk version 'libc0.9.32'
Installed: Available:
libc0.9.32-0.9.33.2-r1 = 0.9.33.2-r1

bei:~# cat /etc/apk/repositories
/media/usb/apks
http://nl.alpinelinux.org/alpine/v2.4/main

bei:~# uname -a
Linux bei 3.3.6-grsec #1-Alpine SMP Mon May 14 13:42:17 UTC 2012 x86_64 Linux

And yes it was working with the 2.4.1

The segfault happen when I try to mount the nfs share. I can let you
an SSH access if you want to check around my system.

Thanks for taking care of this problem.

Regards,

On Mon, May 21, 2012 at 3:27 PM, Natanael Copa <ncopa_at_alpinelinux.org> wrote:
> On Mon, 21 May 2012 09:19:04 +0200
> alex M <lonkaji_at_gmail.com> wrote:
>
>> Hi,
>>
>> I upgade from 2.4.1 to 2.4.2 and now I got a real problem with the
>> nfs daemon:
>>
>> [  482.292020] rpc.mountd[2043]: segfault at 7873d1d796c8 ip
>> 0000786bd1b52c96 sp 00007ae3fb88a470 error 4 in
>> libuClibc-0.9.33.2.so[786bd1b07000+6b000]
>> [  482.292057] grsec: Segmentation fault occurred at 00007873d1d796c8
>> in /usr/sbin/rpc.mountd[rpc.mountd:2043] uid/euid:0/0 gid/egid:0/0,
>> parent /bin/busybox[init:1] uid/euid:0/0 gid/egid:0/0
>> [  482.292087] grsec: denied resource overstep by requesting 4096 for
>> RLIMIT_CORE against limit 0 for /usr/sbin/rpc.mountd[rpc.mountd:2043]
>> uid/euid:0/0 gid/egid:0/0, parent /bin/busybox[init:1] uid/euid:0/0
>> gid/egid:0/0
>>
>> That's a real problem since the main purpose of the computer running
>> alpinelinux is to be a NFS server.
>>
>> I just want to report this bug and pray it can be fix quickly,
>> otherwise I had to reinstall my box with something that don't broke
>> NFS server.
>
> Ok. I was able to reproduce. It works on 2.4.1, it segfaults on
> x86_64 2.4.2 within uclibc code and it segfaults on startup.
>
> What is interesting is that only relevant thing changed between 2.4.1
> and 2.4.2 is the kernel.
>
> I will try make a debug build here and generate a core dump.
>
> Thanks!
>
> -nc
>
>
>> Regards.
>>
>>
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>


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Received on Mon May 21 2012 - 16:47:47 UTC