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authorFlorin Malita <fmalita@gmail.com>2006-09-29 12:55:25 +0200
committerJaroslav Kysela <perex@suse.cz>2006-10-06 20:22:59 +0200
commit104326f8df9925317cca64b84249d3eac5de7c74 (patch)
treec97b00520884caf405da958c0f04b07ed21017f7 /sound
parent92b93d31718a3ccbbcf911d2f570bb345c496d66 (diff)
downloadlinux-2.6.34-ux500-104326f8df9925317cca64b84249d3eac5de7c74.tar.gz
[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 <fmalita@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound')
-rw-r--r--sound/core/hwdep.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c
index 9aa9d94891f..46b47689362 100644
--- a/sound/core/hwdep.c
+++ b/sound/core/hwdep.c
@@ -158,6 +158,7 @@ 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;
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 inode *inode, struct file * file)
hw->used--;
snd_card_file_remove(hw->card, file);
mutex_unlock(&hw->open_mutex);
- module_put(hw->card->module);
+ module_put(mod);
return err;
}