tag_tree_decode: check node being non null

Fixes CID717843 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
13 years ago · 0de0ae5a20
parent a6cac64f69
commit 0de0ae5a20
1 changed files with 3 additions and 0 deletions
--- a/libavcodec/j2kdec.c
+++ b/libavcodec/j2kdec.c
@ -167,6 +167,9 @@ static int tag_tree_decode(J2kDecoderContext *s, J2kTgtNode *node, int threshold
    J2kTgtNode *stack[30];
    int sp = -1, curval = 0;

+    if(!node)
+        return AVERROR(EINVAL);
+
    while(node && !node->vis){
        stack[++sp] = node;
        node = node->parent;