| From | Willy Tarreau <> | Subject | [PATCH 3.10 138/268] ata: sata_mv:- Handle return value of devm_ioremap. | Date | Mon, 19 Jun 2017 20:30:37 +0200 |
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From: Arvind Yadav <arvind.yadav.cs@gmail.com>
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: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Willy Tarreau <w@1wt.eu> --- drivers/ata/sata_mv.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index b256ff5..d9f45c8 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -4097,6 +4097,9 @@ 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; #if defined(CONFIG_HAVE_CLK) -- 2.8.0.rc2.1.gbe9624a
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