From: Jaroslav Kysela <perex@perex.cz>
Date: Wed, 23 Jul 2003 06:57:53 +0000 (+0000)
Subject: NULL check in mmap_begin()
X-Git-Tag: v1.0.3~136
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=cb1f308ab514fda366ef746bdac80ec826ebab4a;p=alsa-lib.git

NULL check in mmap_begin()
---

diff --git a/src/pcm/pcm.c b/src/pcm/pcm.c
index 8ccb08c8..acea5054 100644
--- a/src/pcm/pcm.c
+++ b/src/pcm/pcm.c
@@ -5955,8 +5955,12 @@ int snd_pcm_mmap_begin(snd_pcm_t *pcm,
 	snd_pcm_uframes_t cont;
 	snd_pcm_uframes_t f;
 	snd_pcm_uframes_t avail;
+	const snd_pcm_channel_area_t *xareas;
 	assert(pcm && areas && offset && frames);
-	*areas = snd_pcm_mmap_areas(pcm);
+	xareas = snd_pcm_mmap_areas(pcm);
+	if (xareas == NULL)
+		return -EBADFD;
+	*areas = xareas;
 	*offset = *pcm->appl.ptr % pcm->buffer_size;
 	avail = snd_pcm_mmap_avail(pcm);
 	if (avail > pcm->buffer_size)