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| author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2016-12-12 23:13:27 +0530 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2017-01-06 15:45:32 -0500 |
| commit | 064c3db9c564cc5be514ac21fb4aa26cc33db746 (patch) | |
| tree | 9875da27d40d874837ecca529ba42e54bcc56b10 /drivers/ata | |
| parent | 2dae99558e86894e9e5dbf097477baaa5eb70134 (diff) | |
| download | linux-064c3db9c564cc5be514ac21fb4aa26cc33db746.tar.bz2 | |
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
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/sata_mv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 823e938c9a78..2f32782cea6d 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -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); |