1 files changed, 8 insertions, 4 deletions
diff --git a/chromium/third_party/ffmpeg/libavcodec/iff.c b/chromium/third_party/ffmpeg/libavcodec/iff.c
index e71f5b00b96..f08a0f70cef 100644
--- a/chromium/third_party/ffmpeg/libavcodec/iff.c
+++ b/chromium/third_party/ffmpeg/libavcodec/iff.c
@@ -488,17 +488,21 @@ static int decode_byterun(uint8_t *dst, int dst_size,
         unsigned length;
         const int8_t value = *buf++;
         if (value >= 0) {
-            length = value + 1;
-            memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf));
+            length = FFMIN3(value + 1, dst_size - x, buf_end - buf);
+            memcpy(dst + x, buf, length);
             buf += length;
         } else if (value > -128) {
-            length = -value + 1;
-            memset(dst + x, *buf++, FFMIN(length, dst_size - x));
+            length = FFMIN(-value + 1, dst_size - x);
+            memset(dst + x, *buf++, length);
         } else { // noop
             continue;
         }
         x += length;
     }
+    if (x < dst_size) {
+        av_log(NULL, AV_LOG_WARNING, "decode_byterun ended before plane size\n");
+        memset(dst+x, 0, dst_size - x);
+    }
     return buf - buf_start;
 }