From: Mingjie Shen <shen497@purdue.edu>
Date: Mon, 13 Jan 2025 21:39:34 +0000 (-0500)
Subject: fix out-of-bounds array index access
X-Git-Tag: v1.5.7^2~35^2~1
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=e490be895cda9d1d6f707eaa86f8a72995960053;p=thirdparty%2Fzstd.git

fix out-of-bounds array index access
---

diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 04b6bb9f1..ef1817f52 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -6713,7 +6713,7 @@ ZSTD_transferSequences_wBlockDelim(ZSTD_CCtx* cctx,
 
     ZSTD_memcpy(cctx->blockState.nextCBlock->rep, updatedRepcodes.rep, sizeof(Repcodes_t));
 
-    if (inSeqs[idx].litLength) {
+    if (idx < inSeqsSize && inSeqs[idx].litLength) {
         DEBUGLOG(6, "Storing last literals of size: %u", inSeqs[idx].litLength);
         ZSTD_storeLastLiterals(&cctx->seqStore, ip, inSeqs[idx].litLength);
         ip += inSeqs[idx].litLength;