From: Julien Malik <julien.malik@paraiso.me>
Date: Mon, 2 May 2016 10:13:24 +0000 (+0200)
Subject: Fix UBSan gcc warning for first arg to memset non null
X-Git-Tag: v2.1.1~18^2~8^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e1e018a8dc8c96f45486768356b7fb370ae0527c;p=openjpeg

Fix UBSan gcc warning for first arg to memset non null
---

diff --git a/src/lib/openjp2/t1.c b/src/lib/openjp2/t1.c
index 1e9480bd..1bf7205e 100644
--- a/src/lib/openjp2/t1.c
+++ b/src/lib/openjp2/t1.c
@@ -1180,7 +1180,10 @@ static OPJ_BOOL opj_t1_allocate_buffers(
 			}
 			t1->datasize=datasize;
 		}
-		memset(t1->data,0,datasize * sizeof(OPJ_INT32));
+		/* memset first arg is declared to never be null by gcc */
+		if (t1->data != NULL) {
+			memset(t1->data,0,datasize * sizeof(OPJ_INT32));
+		}
 	}
 	t1->flags_stride=w+2;
 	flagssize=t1->flags_stride * (h+2);