16 lines
764 B
Diff
16 lines
764 B
Diff
diff --git a/third_party/zlib/deflate.c b/third_party/zlib/deflate.c
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index a39e62787862..c6053fd1c7ea 100644
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--- a/third_party/zlib/deflate.c
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+++ b/third_party/zlib/deflate.c
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@@ -318,6 +318,10 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
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s->w_size + window_padding,
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2*sizeof(Byte));
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s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos));
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+ /* Avoid use of uninitialized value, see:
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+ * https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11360
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+ */
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+ zmemzero(s->prev, s->w_size * sizeof(Pos));
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s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos));
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s->high_water = 0; /* nothing written to s->window yet */
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