[Bug binutils/18708] integer overflow in readelf and invalid shift in objdump

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18708

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |amodra at gmail dot com

--- Comment #1 from Alan Modra <amodra at gmail dot com> ---
I believe the first two readelf ubsan errors have been fixed both in master
binutils and on the 2.25 branch.

The third readelf ubsan error is on this line
              section.sh_size = ftell (file) - section.sh_offset;
ftell returns a signed type, and section.sh_offset is also a signed type, thus
the ubsan error about signed integer overflow.  I don't consider this sort of
"error" worth fixing by adding casts or changing the type of sh_offset, since
it was induced by a fuzzed binary.

The i386-dis.c ubsan errors are technically correct, but in reality just so
much useless noise.

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