forked from pool/MozillaFirefox
23 lines
1.1 KiB
Diff
23 lines
1.1 KiB
Diff
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# HG changeset patch
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# Parent 45680ce4ca06795cbca1ea5a9ae8a7a11ab95cf1
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The code tries to find a codec in a list of codecs. For this it searches for a given prefix.
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But the prefix is of type char16_t, which means 2 bytes per character instead of 1, as was compared here.
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On big endian this created some false positives, as the order of bytes is different and some characters only
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occupy "the first" byte, having the second null'ed out.
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Noticed because of gtest: MediaMIMETypes.MediaCodecs
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Upstream bugreport: https://bugzilla.mozilla.org/show_bug.cgi?id=1573381
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diff -r 45680ce4ca06 -r 381102061fcc dom/media/MediaMIMETypes.cpp
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--- a/dom/media/MediaMIMETypes.cpp Mon Aug 05 09:28:53 2019 +0200
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+++ b/dom/media/MediaMIMETypes.cpp Tue Aug 13 07:51:27 2019 +0200
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@@ -87,7 +87,7 @@
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const size_t prefixLength = aCodecPrefix.Length();
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for (const auto& myCodec : Range()) {
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if (myCodec.Length() >= prefixLength &&
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- memcmp(myCodec.Data(), aCodecPrefix.Data(), prefixLength) == 0) {
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+ memcmp(myCodec.Data(), aCodecPrefix.Data(), prefixLength * sizeof(char16_t)) == 0) {
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return true;
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}
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}
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