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avformat/imfdec: check for a missing or empty Path in the asset map

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Fixes: NULL pointer dereference
Fixes: vIIX7oqa3coO
Fixes: 73f6cce936 (avformat/imf: Demuxer)
Found-by: Pavel Kohout (Aisle Research)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 0fe4bd4b43)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Pavel Kohout
2026-06-30 21:53:37 +02:00
committed by Michael Niedermayer
parent 9473f54c36
commit 32c3ca282b
1 changed files with 14 additions and 1 deletions
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15
libavformat/imfdec.c
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@@ -255,7 +255,20 @@ static int parse_imf_asset_map_from_xml_dom(AVFormatContext *s,
return AVERROR_INVALIDDATA;
}
uri = xmlNodeGetContent(ff_imf_xml_get_child_element_by_name(node, "Path"));
xmlNodePtr path_node = ff_imf_xml_get_child_element_by_name(node, "Path");
if (!path_node) {
av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - missing Path element in Chunk\n");
ret = AVERROR_INVALIDDATA;
break;
}
uri = xmlNodeGetContent(path_node);
if (!uri || !uri[0]) {
av_log(s, AV_LOG_ERROR, "Unable to parse asset map XML - empty Path element in Chunk\n");
xmlFree(uri);
ret = AVERROR_INVALIDDATA;
break;
}
if (!imf_uri_is_url(uri) && !imf_uri_is_unix_abs_path(uri) && !imf_uri_is_dos_abs_path(uri))
asset->absolute_uri = av_append_path_component(base_url, uri);
else