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[PATCH] alsa: fix error paths in snd_ctl_elem_add()

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Fix bugs in error paths of snd_ctl_elem_add()
 - NULL reference
 - double free (already freed in snd_ctl_add())

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Jaroslav Kysela <perex@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Takashi Iwai 2006-03-06 15:42:51 -08:00 • committed by Linus Torvalds
parent 5aee405c66
commit 2fbf182ed0
1 changed files with 2 additions and 4 deletions
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6
sound/core/control.c
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@ -959,17 +959,15 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
kctl.private_free = snd_ctl_elem_user_free; kctl.private_free = snd_ctl_elem_user_free;
_kctl = snd_ctl_new(&kctl, access); _kctl = snd_ctl_new(&kctl, access);
if (_kctl == NULL) { if (_kctl == NULL) {
kfree(_kctl->private_data); kfree(ue);
return -ENOMEM; return -ENOMEM;
} }
_kctl->private_data = ue; _kctl->private_data = ue;
for (idx = 0; idx < _kctl->count; idx++) for (idx = 0; idx < _kctl->count; idx++)
_kctl->vd[idx].owner = file; _kctl->vd[idx].owner = file;
err = snd_ctl_add(card, _kctl); err = snd_ctl_add(card, _kctl);
if (err < 0) { if (err < 0)
snd_ctl_free_one(_kctl);
return err; return err;
}
down_write(&card->controls_rwsem); down_write(&card->controls_rwsem);
card->user_ctl_count++; card->user_ctl_count++;