Commit 064c3db9 authored Dec 12, 2016 by Arvind Yadav Committed by Tejun Heo Jan 06, 2017

ata: sata_mv:- Handle return value of devm_ioremap.



Here, If devm_ioremap will fail. It will return NULL.
Then hpriv->base = NULL - 0x20000; Kernel can run into
a NULL-pointer dereference. This error check will avoid
NULL pointer dereference.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org

parent 2dae9955

drivers/ata/sata_mv.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -4132,6 +4132,9 @@ static int mv_platform_probe(struct platform_device *pdev)
		host->iomap = NULL;
		hpriv->base = devm_ioremap(&pdev->dev, res->start,
		resource_size(res));
		if (!hpriv->base)
		return -ENOMEM;

		hpriv->base -= SATAHC0_REG_BASE;

		hpriv->clk = clk_get(&pdev->dev, NULL);