Commit 81ecb370 authored by Kangjie Lu's avatar Kangjie Lu Committed by DidntRead
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ALSA: sb8: add a check for request_region 



[ Upstream commit dcd0feac9bab901d5739de51b3f69840851f8919 ]

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

Signed-off-by: default avatarKangjie Lu <kjlu@umn.edu>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 1742616c

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],