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-rw-r--r--core/fpdfapi/parser/fpdf_parser_decode.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/core/fpdfapi/parser/fpdf_parser_decode.cpp b/core/fpdfapi/parser/fpdf_parser_decode.cpp
index 7a9f798c85..e8bb21ca92 100644
--- a/core/fpdfapi/parser/fpdf_parser_decode.cpp
+++ b/core/fpdfapi/parser/fpdf_parser_decode.cpp
@@ -256,7 +256,8 @@ uint32_t RunLengthDecode(pdfium::span<const uint8_t> src_span,
copy_len = buf_left;
memset(*dest_buf + dest_count + copy_len, '\0', delta);
}
- memcpy(*dest_buf + dest_count, &src_span[i + 1], copy_len);
+ auto copy_span = src_span.subspan(i + 1, copy_len);
+ memcpy(*dest_buf + dest_count, copy_span.data(), copy_span.size());
dest_count += src_span[i] + 1;
i += src_span[i] + 2;
} else {