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gstmeta: intern registered impl string

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Subsequent lookups in the hashtable are probably better done
on memory we're confident is allocated to us :)

It was easy to trigger invalid reads by calling gst_meta_register
with dynamically allocated memory, freeing that memory, then
calling gst_meta_get_info()

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/628>
This commit is contained in:
Mathieu Duponchelle 2020-09-16 02:16:52 +02:00 committed by GStreamer Merge Bot
parent f26a9ebafb
commit 3393b456e4
1 changed files with 2 additions and 1 deletions
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3
gst/gstmeta.c
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@ -198,7 +198,8 @@ gst_meta_register (GType api, const gchar * impl, gsize size,
g_type_name (api), size);
g_rw_lock_writer_lock (&lock);
g_hash_table_insert (metainfo, (gpointer) impl, (gpointer) info);
g_hash_table_insert (metainfo, (gpointer) g_intern_string (impl),
(gpointer) info);
g_rw_lock_writer_unlock (&lock);
return info;