opj_dwt_decode_tile(): avoid potential UndefinedBehaviorSanitizer 'applying zero offset to null pointer' (fixes #1505)

1 files changed, 3 insertions, 1 deletions

diff --git a/src/lib/openjp2/dwt.c b/src/lib/openjp2/dwt.c
index abc500ec..6b18c5dd 100644
--- a/src/lib/openjp2/dwt.c
+++ b/src/lib/openjp2/dwt.c
@@ -2083,7 +2083,9 @@ static OPJ_BOOL opj_dwt_decode_tile(opj_thread_pool_t* tp,
     OPJ_SIZE_T h_mem_size;
     int num_threads;
 
-    if (numres == 1U) {
+    /* Not entirely sure for the return code of w == 0 which is triggered per */
+    /* https://github.com/uclouvain/openjpeg/issues/1505 */
+    if (numres == 1U || w == 0) {
         return OPJ_TRUE;
     }
     num_threads = opj_thread_pool_get_thread_count(tp);