Messages in this thread Patch in this message | | | From | Sachin Kamat <> | Subject | [PATCH 2/2] dma: ste_dma40: Fix potential null pointer dereference | Date | Mon, 2 Sep 2013 13:44:59 +0530 |
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kcalloc can return NULL. Check the pointer before dereferencing.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> --- 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 df0a606..82d2b97 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; -- 1.7.9.5
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