Bug 861888 - nfs-utils buffer overflow (similar to 485448)
nfs-utils buffer overflow (similar to 485448)
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: nfs-utils (Show other bugs)
x86_64 Linux
unspecified Severity unspecified
: rc
: ---
Assigned To: Steve Dickson
Red Hat Kernel QE team
Depends On:
  Show dependency treegraph
Reported: 2012-10-01 05:04 EDT by Oz
Modified: 2014-02-05 16:47 EST (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2014-02-05 16:47:20 EST
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Oz 2012-10-01 05:04:15 EDT
Description of problem:
This bug is essentially similar to the one mentioned in the subject.

Version-Release number of selected component (if applicable):
The bugs occurs on a clean install of RHEL 5.8 with nfs-utils-1.0.9-60.el5.x86_64.rpm:

How reproducible:
This occurs every time I try to mount an NFS partition from another Linux machine
That machine offers
rpcinfo -p | grep nfs
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs

When I downgraded nfs-utils to a previous version, the  mount command was successful. Here is an account of my actions including crash trace:

[root@rhel58 tmp]# rpm --force -i nfs-utils-1.0.9-44.el5.x86_64.rpm
warning: nfs-utils-1.0.9-44.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
[root@rhel58 tmp]# mount -o udp,nolock,ro /viip_client
[root@rhel58 tmp]# lsb_release -a

LSB Version:    :core-4.0-amd64:core-4.0-ia32:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-ia32:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-ia32:printing-4.0-noarch
Distributor ID: RedHatEnterpriseServer
Description:    Red Hat Enterprise Linux Server release 5.8 (Tikanga)
Release:        5.8
Codename:       Tikanga
[root@muclc6113 tmp]# rpm --force -i nfs-utils-1.0.9-60.el5.x86_64.rpm
warning: nfs-utils-1.0.9-60.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
[root@muclc6113 tmp]# mount -o udp,nolock,ro /viip_client
*** buffer overflow detected ***: /sbin/mount.nfs terminated
======= Backtrace: =========
======= Memory map: ========
2b40db7bf000-2b40db7d0000 r-xp 00000000 08:03 22184175                   /sbin/mount.nfs
2b40db9d0000-2b40db9d1000 rw-p 00011000 08:03 22184175                   /sbin/mount.nfs
2b40db9d1000-2b40db9d6000 rw-p 2b40db9d1000 00:00 0
2b40db9d6000-2b40db9f2000 r-xp 00000000 08:03 25657348                   /lib64/ld-2.5.so
2b40db9f2000-2b40db9f4000 rw-p 2b40db9f2000 00:00 0
2b40dbbf2000-2b40dbbf3000 r--p 0001c000 08:03 25657348                   /lib64/ld-2.5.so
2b40dbbf3000-2b40dbbf4000 rw-p 0001d000 08:03 25657348                   /lib64/ld-2.5.so
2b40dbbf4000-2b40dbd43000 r-xp 00000000 08:03 25657355                   /lib64/libc-2.5.so
2b40dbd43000-2b40dbf42000 ---p 0014f000 08:03 25657355                   /lib64/libc-2.5.so
2b40dbf42000-2b40dbf46000 r--p 0014e000 08:03 25657355                   /lib64/libc-2.5.so
2b40dbf46000-2b40dbf47000 rw-p 00152000 08:03 25657355                   /lib64/libc-2.5.so
2b40dbf47000-2b40dbf4d000 rw-p 2b40dbf47000 00:00 0
2b40dbf4d000-2b40dbf5a000 r-xp 00000000 08:03 25657346                   /lib64/libgcc_s-4.1.2-20080825.so.1
2b40dbf5a000-2b40dc15a000 ---p 0000d000 08:03 25657346                   /lib64/libgcc_s-4.1.2-20080825.so.1
2b40dc15a000-2b40dc15b000 rw-p 0000d000 08:03 25657346                   /lib64/libgcc_s-4.1.2-20080825.so.1
2b40f3b1e000-2b40f3b3f000 rw-p 2b40f3b1e000 00:00 0                      [heap]
7fffb2996000-7fffb29ab000 rw-p 7ffffffe9000 00:00 0                      [stack]
7fffb29fd000-7fffb2a00000 r-xp 7fffb29fd000 00:00 0                      [vdso]
ffffffffff600000-ffffffffffe00000 ---p 00000000 00:00 0                  [vsyscall]


I have tried also specifying UDP or TCP, or NFS v.2 or NFS v.3 (in all 4 possible combinations), the buffer overflow happens always.
Comment 1 Oz 2012-10-01 05:24:41 EDT
I was looking at nfs-utils in some more versions available, this bug occurs also with nfs-utils-1.0.9-54!

I must, unfortunately, downgrade to  nfs-utils-1.0.9-50, the latest version where that bug does not occur.
Comment 2 Oz 2012-10-11 05:31:45 EDT
OK, I found out this bug is a similar to this:

I have enabled nfs version 3 on the server system and now my RHEL5.8 can mount 

in  /etc/sysconfig/nfs

SIDE NOTE: the NFS server is a slightly modified RHEL55, NOT CentOS. All the packages including Kernel and nfs utils are RHEL55 compiled packages with exact md5sum for RHEL55.
Comment 3 RHEL Product and Program Management 2014-01-29 05:36:09 EST
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux release.  Product Management has
requested further review of this request by Red Hat Engineering, for
potential inclusion in a Red Hat Enterprise Linux release for currently
deployed products.  This request is not yet committed for inclusion in
a release.
Comment 4 RHEL Product and Program Management 2014-02-05 16:47:20 EST
Development Management has reviewed and declined this request.
You may appeal this decision by reopening this request.

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