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Bug 603886 - If empty totem tag is in config file ccs_config_dump segfaults
Summary: If empty totem tag is in config file ccs_config_dump segfaults
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: corosync
Version: 6.0
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Steven Dake
QA Contact: Cluster QE
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-06-14 18:56 UTC by Chris Feist
Modified: 2016-04-26 15:38 UTC (History)
5 users (show)

Fixed In Version: corosync-1.2.3-2.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-11-15 13:53:45 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Patch to fix objdb (400 bytes, patch)
2010-06-15 15:02 UTC, Christine Caulfield 		no flags Details | Diff
View All

Description Chris Feist 2010-06-14 18:56:24 UTC 
Description of problem:
If an empty totem tag is in the cluster.conf file ccs_config_dump segfaults causing 'service cman start' to fail.

Version-Release number of selected component (if applicable):
cman-3.0.12-6.el6.x86_64

How reproducible:
Everytime

Steps to Reproduce:
1. Put in empty totem tag into cluster.conf '<totem>'
2. Run 'service cman start'
3. Segfault
  
Actual results:
Segfault

Expected results:
Dump of cluster.conf file.

Additional info:
Stack trace of segfault:


Program terminated with signal 11, Segmentation fault.
#0  __strlen_sse2 () at ../sysdeps/x86_64/strlen.S:31
31		pcmpeqb	(%rdi), %xmm2
(gdb) bt
#0  __strlen_sse2 () at ../sysdeps/x86_64/strlen.S:31
#1  0x00007f6c54063898 in object_key_iter (parent_object_handle=1265737887312248845, key_name=0x7fff2b1ae398, key_len=0x7fff2b1ae390, 
    value=<value optimized out>, value_len=0x7fff2b1ae380) at objdb.c:1543
#2  0x00007f6c53c566b5 in copy_config_tree (objdb=0x7f6c54266380, source_object=1265737887312248845, target_parent_object=<value optimized out>, 
    always_create=<value optimized out>) at /usr/src/debug/cluster-3.0.12/cman/daemon/cman-preconfig.c:1066
#3  0x00007f6c53c567d1 in copy_tree_to_root (objdb=0x7f6c54266380, name=0x7f6c53c5a025 "totem", always_create=0)
    at /usr/src/debug/cluster-3.0.12/cman/daemon/cman-preconfig.c:1102
#4  0x00007f6c53c59a69 in cmanpre_readconfig (objdb=0x7f6c54266380, error_string=0x7fff2b1ae8f8)
    at /usr/src/debug/cluster-3.0.12/cman/daemon/cman-preconfig.c:1322
#5  0x00000039584087a8 in load_config () at sa-confdb.c:130
#6  confdb_sa_init () at sa-confdb.c:159
#7  0x0000003958402ee0 in confdb_initialize (handle=0x7fff2b1ae998, callbacks=0x6016a0) at confdb.c:146
#8  0x0000000000400f3f in main (argc=1, argv=0x7fff2b1aea98, envp=<value optimized out>)
    at /usr/src/debug/cluster-3.0.12/config/tools/xml/ccs_config_dump.c:138
Comment 1 RHEL Program Management 2010-06-14 19:02:59 UTC 
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.
Comment 2 Fabio Massimo Di Nitto 2010-06-15 05:21:05 UTC 
Chrissie, looking at the back trace, this looks like a bug in cman-preconfig copy_to_tree function. From the look of it, it's a missing NULL check.

Can you please take a look at it?

Thanks
Fabio
Comment 3 Christine Caulfield 2010-06-15 08:05:25 UTC 
Can you post the full cluster.conf file please? I can't reproduce this problem.

I tried

<?xml version="1.0" ?>
<cluster config_version="1" name="cluster3">

 <totem></totem>


... and

<?xml version="1.0" ?>
<cluster config_version="1" name="cluster3">

 <totem/>

...
Comment 4 Christine Caulfield 2010-06-15 15:02:27 UTC 
Created attachment 424186 [details]
Patch to fix objdb

This looks to me like a bug in corosync.

object_key_iter() calls object_key_iter_typed() and then always tries to dereference the string it returns, even if it fails. The attached patch fixes this
Comment 6 releng-rhel@redhat.com 2010-11-15 13:53:45 UTC 
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.
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