Issue 23433 in oss-fuzz: Heap-buffer-overflow in findNextBorderPixel()

* Check pix boundary when looking for the next pixel.
DanBloomberg · Jun 15, 2020 · 8d6e175 · 8d6e175
1 parent 20e1a04
commit 8d6e175
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/ccbord.c b/src/ccbord.c
@@ -1080,6 +1080,8 @@ l_uint32  *line;
         pos = (qpos + i) % 8;
         npx = px + xpostab[pos];
         npy = py + ypostab[pos];
+        if (npx < 0 || npx >= w || npy < 0 || npy >= h)
+            continue;
         line = data + npy * wpl;
         val = GET_DATA_BIT(line, npx);
         if (val) {