From 649fdb2a4ef44c1a2361e72bd4d7d9fa1b78b7df Mon Sep 17 00:00:00 2001 From: Florin Malita Date: Wed, 28 Mar 2007 22:38:55 +0200 Subject: [PATCH] [ALSA] Dereference after free in snd_hwdep_release() 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 Signed-off-by: Takashi Iwai Signed-off-by: Adrian Bunk --- sound/core/hwdep.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c index 618c43be0bc3..c3845f6eedce 100644 --- a/sound/core/hwdep.c +++ b/sound/core/hwdep.c @@ -157,6 +157,7 @@ static int snd_hwdep_release(struct inode *inode, struct file * file) { int err = -ENXIO; struct snd_hwdep *hw = file->private_data; + struct module *mod = hw->card->module; down(&hw->open_mutex); if (hw->ops.release) { err = hw->ops.release(hw, file); @@ -166,7 +167,7 @@ static int snd_hwdep_release(struct inode *inode, struct file * file) hw->used--; snd_card_file_remove(hw->card, file); up(&hw->open_mutex); - module_put(hw->card->module); + module_put(mod); return err; } -- 2.39.5