swscale/swscale_unscaled: adjust last line copy

Fixes: out of array access Fixes: DFVULN-694 *Reporter: Zhenpeng (Leo) Lin at depthfirst* Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit 43a0715e30) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2026-05-01 16:35:51 +02:00
parent 8df701d7b2
commit 939d84afb0
1 changed files with 5 additions and 1 deletions
@@ -127,9 +127,13 @@ static void copyPlane(const uint8_t *src, int srcStride,
                      int srcSliceY, int srcSliceH, int width,
                      uint8_t *dst, int dstStride)
 {
+    if (!srcSliceH)
+        return;
+    av_assert0(srcSliceH > 0);
+
    dst += dstStride * srcSliceY;
    if (dstStride == srcStride && srcStride > 0) {
-        memcpy(dst, src, srcSliceH * dstStride);
+        memcpy(dst, src, (srcSliceH - 1) * dstStride + width);
    } else {
        int i;
        for (i = 0; i < srcSliceH; i++) {