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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Query INFO_LOG_LENGTH for empty info log should return 0"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97321#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Query INFO_LOG_LENGTH for empty info log should return 0"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97321">bug 97321</a>
from <span class="vcard"><a class="email" href="mailto:idr@freedesktop.org" title="Ian Romanick <idr@freedesktop.org>"> <span class="fn">Ian Romanick</span></a>
</span></b>
<pre>(In reply to Qiankun Miao from <a href="show_bug.cgi?id=97321#c7">comment #7</a>)
<span class="quote">> (In reply to Ian Romanick from <a href="show_bug.cgi?id=97321#c6">comment #6</a>)
> > The spec also says, "If pname is INFO_LOG_LENGTH , the length of the info
> > log, including a null terminator, is returned." If this query returns 0,
> > then glGetProgramInfoLog CANNOT write anything to the buffer... and it
> > currently does.
>
> I think returned value of GetProgramiv() can be 0. It doesn't affect the
> real length of the info log buffer. Driver can still return a null
> terminator string.</span >
That is absolutely false. The whole point of the
glGetProgramiv(GL_INFO_LOG_LENGTH) query is so that the application can
allocate a buffer to store the data that will be returned by
glGetProgramInfoLog. Having those mismatch, under any circumstances, is wrong
to the point that it could create a buffer overrun security problem.</pre>
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