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authorKirill Tkhai <ktkhai@parallels.com>2014-02-14 15:47:57 +0400
committerTakashi Iwai <tiwai@suse.de>2014-02-14 14:41:52 +0100
commit115b94d51a3ee1b7dfffa74f77e20cd11da70b91 (patch)
tree447f055272dd38953873fdf14a86ebdb68c51806 /sound
parent9ce5054363c6ec7e38d0c6c39bd116ec4f7d6480 (diff)
downloadop-kernel-dev-115b94d51a3ee1b7dfffa74f77e20cd11da70b91.zip
op-kernel-dev-115b94d51a3ee1b7dfffa74f77e20cd11da70b91.tar.gz
ALSA: ak4117: Do not free priv until timer handler hasn't actually stopped using it
Function del_timer() does not guarantee that timer was really deleted. If the timer handler is beeing executed at the moment, the function does nothing. So, it's possible to use already freed memory in the handler: [ref: Documentation/DocBook/kernel-locking.tmpl] This was found using grep and compile-tested only. Signed-off-by: Kirill Tkhai <ktkhai@parallels.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/i2c/other/ak4117.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/i2c/other/ak4117.c b/sound/i2c/other/ak4117.c
index 40e33c9..88452e8 100644
--- a/sound/i2c/other/ak4117.c
+++ b/sound/i2c/other/ak4117.c
@@ -62,7 +62,7 @@ static void reg_dump(struct ak4117 *ak4117)
static void snd_ak4117_free(struct ak4117 *chip)
{
- del_timer(&chip->timer);
+ del_timer_sync(&chip->timer);
kfree(chip);
}
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