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Bug 1196371 - rpc.gssd segfaults in gssproxy (proxymech.so)
Summary: rpc.gssd segfaults in gssproxy (proxymech.so)
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: gssproxy
Version: 7.2
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Simo Sorce
QA Contact: Yongcheng Yang
URL:
Whiteboard:
: 1196794 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-02-25 20:13 UTC by Steve Dickson
Modified: 2015-11-19 09:30 UTC (History)
5 users (show)

Fixed In Version: gssproxy-0.4.1-2.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-11-19 09:30:39 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Full Backtrace (3.34 KB, text/plain)
2015-02-25 20:13 UTC, Steve Dickson 		no flags Details
wireshark trace showing the AUTH_ERROR (1.39 KB, application/octet-stream)
2015-02-26 16:48 UTC, Steve Dickson 		no flags Details
valgrid log (79.21 KB, text/plain)
2015-02-26 17:01 UTC, Steve Dickson 		no flags Details
Fix for the double-free bug (8.12 KB, patch)
2015-02-26 22:37 UTC, Simo Sorce 		no flags Details | Diff
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:2298 0 normal SHIPPED_LIVE gssproxy bug fix and enhancement update 2015-11-19 09:43:20 UTC

Description Steve Dickson 2015-02-25 20:13:51 UTC 
Created attachment 995330 [details]
Full Backtrace

Description of problem:
The following segfault happen in rpc.gssd when Red Hat Storage
server (aka the ganesha server)

#0 memmove_ssse3_back () at ../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:2588
#0 0x00007fb790aba8e3 in memmove (__len=103, __src=<optimized out>, __dest=<optimized out>) at /usr/include/bits/string3.h:57
#2  xdrmem_putbytes (xdrs=0x7fff5aa23880, addr=<optimized out>, len=103) at xdr_mem.c:145
#3  0x00007fb790ab9fda in gssrpc_xdr_opaque (xdrs=0x7fff5aa23880, cp=<optimized out>, cnt=<optimized out>)
    at xdr.c:414

The full back trace is attached. 

Version-Release number of selected component (if applicable):
gssproxy-0.3.0-10.el7

How reproducible:
100%

Steps to Reproduce:
1. start rpc.gssd with a valid keytab
2. mount the Red Hat storage server. 
3.

Additional info:
The problem occurs because the rhel7 client is trying to
set up a GSS context with the server. Security is not
enabled on the server so the request is failed with 
an AUTH_ERROR error.
Comment 1 Simo Sorce 2015-02-25 20:37:34 UTC 
What nfs-utils and gssproxy package versions ?
Comment 2 Steve Dickson 2015-02-25 20:59:51 UTC 
(In reply to Simo Sorce from comment #1)
> What nfs-utils and gssproxy package versions ?
See above... gssproxy-0.3.0-10.el7
nfs-utils-1.3.0-0.8.el7
Comment 4 Steve Dickson 2015-02-26 16:09:27 UTC 
to get the attached back trace I did the following:

Restart rpc.gssd
   systemctl restart rpc-gssd 

Attached to the runnning process
   gdb -p $(pidof rpc.gssd)

Set the following gdb things
   set follow-fork-mode child # gdb will follow the forked child
   handle SIG37 nostop # gdb will ignore SIG 37
   c # continue 

In another window 
  mount ganesha-server:/export /mnt
Comment 5 Steve Dickson 2015-02-26 16:48:55 UTC 
Created attachment 995695 [details]
wireshark trace showing the AUTH_ERROR
Comment 6 Steve Dickson 2015-02-26 17:01:41 UTC 
Created attachment 995700 [details]
valgrid log
Comment 7 Benjamin Coddington 2015-02-26 22:30:09 UTC 
*** Bug 1196794 has been marked as a duplicate of this bug. ***
Comment 8 Simo Sorce 2015-02-26 22:37:11 UTC 
Created attachment 995848 [details]
Fix for the double-free bug

Steve,
the attached patch is a more complete version of the scratch build you tested today, and it is the one sent upstream.
For reference.
Comment 9 Dmitri Pal 2015-04-15 16:48:42 UTC 
Upstream ticket:
https://fedorahosted.org/gss-proxy/ticket/144
Comment 10 Dmitri Pal 2015-04-16 19:27:20 UTC 
Upstream ticket:
https://fedorahosted.org/gss-proxy/ticket/137
Comment 11 Roland Mainz 2015-07-10 01:03:17 UTC 
Fixed in gssproxy-0.4.1-2.el7 ...

... marking bug as MODIFIED.
Comment 16 errata-xmlrpc 2015-11-19 09:30:39 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2298.html
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