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Description of problem:

rcs segfaults on certain large directories when called by cvsweb.  This is shown in the audit logs as follows.

>type=ANOM_ABEND msg=audit(1476987465.316:15375): auid=4294967295 uid=48 gid=48 ses=4294967295 subj=system_u:system_r:cvs_script_t:s0 pid=25858 comm="rcs" reason="memory violation" sig=11

The directory being accessed has 3.7 GB of data.

Version-Release number of selected component (if applicable):

Version     : 5.9.0
Release     : 5.el7

How reproducible:

Always

Steps to Reproduce:
1. Open cvsweb, click on a directory

Actual results:
An internal server error is returned due to rcs segfaulting.

Expected results:
The directory contents are listed.

Additional info:
Server is running cvsweb 3.0.6.

The same error also occurs using rcs version 5.9.4 from upstream.

> Oct 25 13:48:49 server-cent7 kernel: rcs[8968]: segfault at 7ffd003c7b40 ip 000000000040e62a sp 00007ffd003c7b40 error 6 in rcs[400000+2a000]

Created attachment 1214736 [details]
Patch to fix segfaults

Created attachment 1214737 [details]
updated spec file

This spec file can be used to build a new package which includes the previously attached patch.

There is now a patch available which corrects the segfaults generated by the rlog application.  See http://git.savannah.gnu.org/cgit/rcs.git/commit/?h=p&id=6bb3cb6c for more details.

Thank you for the patch