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ALSA: pcm: prevent UAF in snd_pcm_info
[pandora-kernel.git]
/
sound
/
core
/
pcm.c
diff --git
a/sound/core/pcm.c
b/sound/core/pcm.c
index
13eaeb3
..
00905d1
100644
(file)
--- a/
sound/core/pcm.c
+++ b/
sound/core/pcm.c
@@
-145,7
+145,9
@@
static int snd_pcm_control_ioctl(struct snd_card *card,
err = -ENXIO;
goto _error;
}
+ mutex_lock(&pcm->open_mutex);
err = snd_pcm_info_user(substream, info);
+ mutex_unlock(&pcm->open_mutex);
_error:
mutex_unlock(®ister_mutex);
return err;