From: Florin Malita <fmalita@gmail.com>

snd_card_file_remove() may free hw->card so we can't dereference
hw->card->module after that.

Coverity ID 1420.

Signed-off-by: Florin Malita <fmalita@gmail.com>
Cc: Jaroslav Kysela <perex@suse.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 sound/core/hwdep.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff -puN sound/core/hwdep.c~dereference-after-free-in-snd_hwdep_release sound/core/hwdep.c
--- a/sound/core/hwdep.c~dereference-after-free-in-snd_hwdep_release
+++ a/sound/core/hwdep.c
@@ -158,6 +158,7 @@ static int snd_hwdep_release(struct inod
 {
 	int err = -ENXIO;
 	struct snd_hwdep *hw = file->private_data;
+	struct module *mod = hw->card->module;
 	mutex_lock(&hw->open_mutex);
 	if (hw->ops.release) {
 		err = hw->ops.release(hw, file);
@@ -167,7 +168,7 @@ static int snd_hwdep_release(struct inod
 		hw->used--;
 	snd_card_file_remove(hw->card, file);
 	mutex_unlock(&hw->open_mutex);
-	module_put(hw->card->module);
+	module_put(mod);
 	return err;
 }
 
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