[Bug 1037066] New: fontmatrix FTBFS if "-Werror=format-security" flag is used

bugzilla at redhat.com bugzilla at redhat.com
Tue Dec 3 03:03:05 UTC 2013


            Bug ID: 1037066
           Summary: fontmatrix FTBFS if "-Werror=format-security" flag is
           Product: Fedora
           Version: rawhide
         Component: fontmatrix
          Assignee: pnemade at redhat.com
          Reporter: dkholia at redhat.com
        QA Contact: extras-qa at fedoraproject.org
                CC: fonts-bugs at lists.fedoraproject.org,
                    i18n-bugs at lists.fedoraproject.org, pnemade at redhat.com

Description of problem

fontmatrix fails to build if "-Werror=format-security" flag is used.


error: format not a string literal and no format arguments


We are working on a proposal to enable "-Werror=format-security" for all
packages. Once this flag is enabled, GCC will refuse to compile code that could
be vulnerable to a string format security flaw. For more details, please see
https://fedorahosted.org/fesco/ticket/1185 page.

To understand why it is important to fix this, please see
https://fedoraproject.org/wiki/Format-Security-FAQ page.

How to fix this

The fix for these errors is quite simple. It's a matter of changing a
line like,


to read,

   printf("%s", foo);

That's it.

Please fix this issue in rawhide with a patch (which you should submit
to upstream to merge moving forward). Please do a new build with the
fix in rawhide. Other releases do not need to be directly fixed, but
there should be no harm in pushing out this fix/patch with other needed
changes to those branches.

In the event you don't fix this bug before the next mass rebuild,
provenpackagers may step in and update your package(s) to fix this

How reproducible

Build fontmatrix-0.9.99-13.r1218.fc20.src.rpm with "-Werror=format-security"
flag to reproduce the problem.

To make this process easier, you can use a modified "redhat-rpm-config" package
from http://people.fedoraproject.org/~halfie/artifacts/redhat-rpm-config/ URL.

$ sha256sum redhat-rpm-config-9.1.0-56.fc20.*

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