[Bug binutils/11889] New: readef: fixes for multiple crashes

[dan dot j dot rosenberg at gmail dot com]

readelf crashes very easily when parsing malformed binaries. The attached patch
fixes three floating point exceptions (divide-by-zero) and approximately 13
out-of-bounds reads (due to null pointer dereference, integer overflows, and bad
array indexing). I have test files that trigger each of these crashes, but the
patch should be pretty self-explanatory. I've tested the patch, confirmed it
breaks no functionality, and that it resolves each of my crash files:

(Patch hosted on Ubuntu's Launchpad)
http://launchpadlibrarian.net/53144133/readelf-crashes.patch

-- 
           Summary: readef: fixes for multiple crashes
           Product: binutils
           Version: 2.20
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: dan dot j dot rosenberg at gmail dot com
                CC: bug-binutils at gnu dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=11889

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