stb_image: JPEG: Accept DNL segment

ago%!(EXTRA string=8 years) · 2219a6da29
parent 59a5a155b4
commit 2219a6da29
1 changed files with 5 additions and 0 deletions
--- a/stb_image.h
+++ b/stb_image.h
@ -3129,6 +3129,11 @@ static int stbi__decode_jpeg_image(stbi__jpeg *j)
            }
            // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0
         }
+      } else if (stbi__DNL(m)) {
+         int Ld = stbi__get16be(j->s);
+         stbi__uint32 NL = stbi__get16be(j->s);
+         if (Ld != 4) stbi__err("bad DNL len", "Corrupt JPEG");
+         if (NL != j->s->img_y) stbi__err("bad DNL height", "Corrupt JPEG");
      } else {
         if (!stbi__process_marker(j, m)) return 0;
      }