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Commit 579a9175 authored by Arvind Yadav's avatar Arvind Yadav Committed by Greg Kroah-Hartman
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ata: sata_mv:- Handle return value of devm_ioremap. 



commit 064c3db9c564cc5be514ac21fb4aa26cc33db746 upstream.

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: default avatarArvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d49d465d

drivers/ata/sata_mv.c

+3 −0
Original line number Diff line number Diff line
@@ -4121,6 +4121,9 @@ 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);