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media: cx23885: Fix snd_card_free call on null card pointer

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Currently a call to snd_card_new that fails will set card with a NULL
pointer, this causes a null pointer dereference on the error cleanup
path when card it passed to snd_card_free. Fix this by adding a new
error exit path that does not call snd_card_free and exiting via this
new path.

Addresses-Coverity: ("Explicit null dereference")

Fixes: 9e44d63246 ("[media] cx23885: Add ALSA support")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Colin Ian King 2021-08-04 10:50:10 +02:00 committed by Mauro Carvalho Chehab
parent 42bb98e420
commit 7266dda2f1
1 changed files with 2 additions and 1 deletions
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3
drivers/media/pci/cx23885/cx23885-alsa.c
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@ -550,7 +550,7 @@ struct cx23885_audio_dev *cx23885_audio_register(struct cx23885_dev *dev)
SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
THIS_MODULE, sizeof(struct cx23885_audio_dev), &card);
if (err < 0)
goto error;
goto error_msg;
chip = (struct cx23885_audio_dev *) card->private_data;
chip->dev = dev;
@ -576,6 +576,7 @@ struct cx23885_audio_dev *cx23885_audio_register(struct cx23885_dev *dev)
error:
snd_card_free(card);
error_msg:
pr_err("%s(): Failed to register analog audio adapter\n",
__func__);