fix oss-fuzz case 55714

happening only when enabling Legacy Format v0.3 and in 32-bit mode (note: support for format 0.3 is disabled by default)
facebook · Feb 6, 2023 · f1de371 · f1de371
1 parent 79bdb8c
commit f1de371
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/legacy/zstd_v03.c b/lib/legacy/zstd_v03.c
@@ -2711,7 +2711,7 @@ static size_t ZSTD_execSequence(BYTE* op,
     if (litEnd > litLimit) return ERROR(corruption_detected);   /* overRead beyond lit buffer */
 
     /* copy Literals */
-    ZSTD_wildcopy(op, *litPtr, sequence.litLength);   /* note : oLitEnd <= oend-8 : no risk of overwrite beyond oend */
+    ZSTD_memmove(op, *litPtr, sequence.litLength);   /* note : used to be wildCopy, changed to fix a bug in 32-bit mode (oss-fuzz case 55714) */
     op = oLitEnd;
     *litPtr = litEnd;   /* update for next sequence */