From 2ec7e2e7b5f41a09264abc6dbcfd3fdc9a1edfd5 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Mon, 2 Sep 2013 13:44:59 +0530 Subject: [PATCH] dma: ste_dma40: Fix potential null pointer dereference kcalloc can return NULL. Check the pointer before dereferencing. Signed-off-by: Sachin Kamat Signed-off-by: Vinod Koul --- drivers/dma/ste_dma40.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index df0a60656a8b..82d2b97ad942 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -2591,6 +2591,9 @@ dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr, int i; sg = kcalloc(periods + 1, sizeof(struct scatterlist), GFP_NOWAIT); + if (!sg) + return NULL; + for (i = 0; i < periods; i++) { sg_dma_address(&sg[i]) = dma_addr; sg_dma_len(&sg[i]) = period_len;