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Commit dcd0feac authored Mar 14, 2019 by Kangjie Lu Committed by Takashi Iwai Mar 16, 2019

ALSA: sb8: add a check for request_region



In case request_region fails, the fix returns an error code to
avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent 6ade657d

sound/isa/sb/sb8.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -111,6 +111,10 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev)

		/* block the 0x388 port to avoid PnP conflicts */
		acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
		if (!acard->fm_res) {
		err = -EBUSY;
		goto _err;
		}

		if (port[dev] != SNDRV_AUTO_PORT) {
		if ((err = snd_sbdsp_create(card, port[dev], irq[dev],