Fix the last valid byte in buf

HDFGroup · Jan 15, 2025 · 79e7168 · 79e7168
1 parent 64568ea
commit 79e7168
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/H5Cimage.c b/src/H5Cimage.c
@@ -1289,7 +1289,7 @@ H5C__decode_cache_image_header(const H5F_t *f, H5C_t *cache_ptr, const uint8_t *
     p = *buf;
 
     /* Ensure buffer has enough data for signature comparison */
-    if (H5_IS_BUFFER_OVERFLOW(p, H5C__MDCI_BLOCK_SIGNATURE_LEN, *buf + buf_size))
+    if (H5_IS_BUFFER_OVERFLOW(p, H5C__MDCI_BLOCK_SIGNATURE_LEN, *buf + buf_size - 1))
         HGOTO_ERROR(H5E_CACHE, H5E_OVERFLOW, FAIL, "Insufficient buffer size for signature");
 
     /* Check signature */