codec: webvtt: subsvtt: fix SEGV

node->psz_attrs can be NULL, cf. CreateDomNodes(). Fixes #29049
1 year ago · 424aa4f6fb
1 changed files with 3 additions and 2 deletions
--- a/modules/codec/webvtt/subsvtt.c
+++ b/modules/codec/webvtt/subsvtt.c
@ -713,8 +713,9 @@ static bool webvtt_domnode_Match_Attribute( const webvtt_dom_node_t *p_node,
    {
        const webvtt_dom_tag_t *p_tagnode = (webvtt_dom_tag_t *) p_node;

-        if( ( !strcmp( p_tagnode->psz_tag, "v" ) && !strcmp( psz, "voice" ) ) || /* v = only voice */
-            ( !strcmp( p_tagnode->psz_tag, "lang" ) && !strcmp( psz, "lang" ) ) )
+        if( p_tagnode->psz_attrs != NULL &&
+          ( ( !strcmp( p_tagnode->psz_tag, "v" ) && !strcmp( psz, "voice" ) ) || /* v = only voice */
+            ( !strcmp( p_tagnode->psz_tag, "lang" ) && !strcmp( psz, "lang" ) ) ) )
        {
            const char *psz_start = NULL;
            /* skip classes decl */