ALSA: PCM: Fix possible memory leaks in the error path

When the first page allocation failed for sgbuf, it leaks the records
that have been formerly allocated.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/sgbuf.c b/sound/core/sgbuf.c
index 4e7ec2b498738b6e2ebca47511be93b590af2aa8..d0f00356fc115a32db23bc8475f08a6aad178c47 100644 (file)
--- a/sound/core/sgbuf.c
+++ b/sound/core/sgbuf.c
@@ -101,7 +101,7 @@ void *snd_malloc_sgbuf_pages(struct device *device,
                if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV, device,
                                                 chunk, &tmpb) < 0) {
                        if (!sgbuf->pages)
-                               return NULL;
+                               goto _failed;
                        if (!res_size)
                                goto _failed;
                        size = sgbuf->pages * PAGE_SIZE;