linux-kernel - [ 114/218] DMA: PL330: Check the pointer returned by kzalloc

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Message-Id: <20120928201514.599733596@linuxfoundation.org>
Date:	Fri, 28 Sep 2012 13:15:31 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alan@...rguk.ukuu.org.uk, Sachin Kamat <sachin.kamat@...aro.org>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Vinod Koul <vinod.koul@...ux.intel.com>
Subject: [ 114/218] DMA: PL330: Check the pointer returned by kzalloc

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sachin Kamat <sachin.kamat@...aro.org>

commit 61c6e7531d3b66b33187b8cdd700fd8ab93ffd62 upstream.

kzalloc could return NULL. Hence add a check to avoid
NULL pointer dereference.

Signed-off-by: Sachin Kamat <sachin.kamat@...aro.org>
Acked-by: Jassi Brar <jassisinghbrar@...il.com>
Signed-off-by: Vinod Koul <vinod.koul@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/dma/pl330.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2937,6 +2937,11 @@ pl330_probe(struct amba_device *adev, co
 		num_chan = max_t(int, pi->pcfg.num_peri, pi->pcfg.num_chan);
 
 	pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
+	if (!pdmac->peripherals) {
+		ret = -ENOMEM;
+		dev_err(&adev->dev, "unable to allocate pdmac->peripherals\n");
+		goto probe_err5;
+	}
 
 	for (i = 0; i < num_chan; i++) {
 		pch = &pdmac->peripherals[i];


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