From 27862d5a3325bc531ec15e3c607e44aa0fd57f6f Mon Sep 17 00:00:00 2001 From: Wen Yang Date: Wed, 10 Jul 2019 15:25:07 +0800 Subject: ASoC: simple-card: fix an use-after-free in simple_for_each_link() The codec variable is still being used after the of_node_put() call, which may result in use-after-free. Fixes: d947cdfd4be2 ("ASoC: simple-card: cleanup DAI link loop method - step1") Link: https://lore.kernel.org/r/1562743509-30496-3-git-send-email-wen.yang99@zte.com.cn Signed-off-by: Wen Yang Acked-by: Kuninori Morimoto Signed-off-by: Mark Brown --- sound/soc/generic/simple-card.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'sound') diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c index 4117e54884e5..ef849151ba56 100644 --- a/sound/soc/generic/simple-card.c +++ b/sound/soc/generic/simple-card.c @@ -364,8 +364,6 @@ static int simple_for_each_link(struct asoc_simple_priv *priv, goto error; } - of_node_put(codec); - /* get convert-xxx property */ memset(&adata, 0, sizeof(adata)); for_each_child_of_node(node, np) @@ -387,11 +385,13 @@ static int simple_for_each_link(struct asoc_simple_priv *priv, ret = func_noml(priv, np, codec, li, is_top); if (ret < 0) { + of_node_put(codec); of_node_put(np); goto error; } } + of_node_put(codec); node = of_get_next_child(top, node); } while (!is_top && node); -- cgit v1.2.3-55-g7522