From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 4 Feb 2019 13:34:00 +0000 (+0100)
Subject: ALSA: core: Don't allow NULL device for memory allocation
X-Git-Tag: v5.4-rc1~1151^2~91
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6ce1d63ed7210e7120070297976460f868c36314;p=platform%2Fkernel%2Flinux-rpi.git

ALSA: core: Don't allow NULL device for memory allocation

Since we covered all callers with NULL device pointer, let's catch the
remaining calls with NULL and warn explicitly.

Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c
index 59a4adc..eb97423 100644
--- a/sound/core/memalloc.c
+++ b/sound/core/memalloc.c
@@ -182,6 +182,8 @@ int snd_dma_alloc_pages(int type, struct device *device, size_t size,
 		return -ENXIO;
 	if (WARN_ON(!dmab))
 		return -ENXIO;
+	if (WARN_ON(!device))
+		return -EINVAL;
 
 	dmab->dev.type = type;
 	dmab->dev.dev = device;