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media: mc: Fix graph walk in media_pipeline_start

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commit 8a9d420149c477e7c97fbd6453704e4612bdd3fa upstream.

The graph walk tries to follow all links, even if they are not between
pads. This causes a crash with, e.g. a MEDIA_LNK_FL_ANCILLARY_LINK link.

Fix this by allowing the walk to proceed only for MEDIA_LNK_FL_DATA_LINK
links.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Cc: stable@vger.kernel.org # for 6.1 and later
Fixes: ae219872834a ("media: mc: entity: Rewrite media_pipeline_start()")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomi Valkeinen 2024-03-18 11:50:59 +02:00 committed by Greg Kroah-Hartman
parent 2a24da4cf6
commit e80d9db99b
1 changed files with 6 additions and 0 deletions
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6
drivers/media/mc/mc-entity.c
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@ -606,6 +606,12 @@ static int media_pipeline_explore_next_link(struct media_pipeline *pipe,
link = list_entry(entry->links, typeof(*link), list);
last_link = media_pipeline_walk_pop(walk);
if ((link->flags & MEDIA_LNK_FL_LINK_TYPE) != MEDIA_LNK_FL_DATA_LINK) {
dev_dbg(walk->mdev->dev,
"media pipeline: skipping link (not data-link)\n");
return 0;
}
dev_dbg(walk->mdev->dev,
"media pipeline: exploring link '%s':%u -> '%s':%u\n",
link->source->entity->name, link->source->index,