ALSA: jack: Check the return value of kstrdup()

kstrdup() can return NULL, it is better to check the return value of it.

Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/tencent_094816F3522E0DC704056C789352EBBF0606@qq.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/jack.c b/sound/core/jack.c
index 32350c6aba849d41af1586a0583f6b1f87b51d35..537df1e98f8acf6c6cf7dd04651046e02332187f 100644 (file)
--- a/sound/core/jack.c
+++ b/sound/core/jack.c
@@ -509,6 +509,10 @@ int snd_jack_new(struct snd_card *card, const char *id, int type,
                return -ENOMEM;
 
        jack->id = kstrdup(id, GFP_KERNEL);
+       if (jack->id == NULL) {
+               kfree(jack);
+               return -ENOMEM;
+       }
 
        /* don't creat input device for phantom jack */
        if (!phantom_jack) {