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<a href="https://gitlab.com/rockdaboot">Tim Rühsen</a>
commented on a
discussion on <a href="https://gitlab.com/gnutls/gnutls/merge_requests/1151#note_276119131">lib/hello_ext.c</a>:
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<pre style="margin: 0;"> <span id="LC295" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="n" style="color: #333;">ret</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC296" class="line" lang="c"> <span class="n" style="color: #333;">hello_ext_ctx_st</span> <span class="n" style="color: #333;">ctx</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC297" class="line" lang="c"></span>
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<pre style="margin: 0;">-<span id="LC298" class="line" lang="c"> <span class="n" style="color: #333;">msg</span> <span class="o" style="font-weight: 600;">&=</span> <span class="n" style="color: #333;">GNUTLS_EXT_FLAG_SET_ONLY_FLAGS_MASK</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC298" class="line" lang="c"> <span class="n" style="color: #333;">msg</span> <span class="o" style="font-weight: 600;">&=</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">gnutls_ext_flags_t</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">GNUTLS_EXT_FLAG_SET_ONLY_FLAGS_MASK</span><span class="p">;</span></span>
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<p dir="auto">Ok, but the mask must be guaranteed unsigned then (by a cast) or we run into another sanitizer issue (implicitly converting negative numbers into unsigned).</p>
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