diff options
| author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2016-12-12 23:13:27 +0530 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-03-06 17:29:13 -0500 |
| commit | 1a472e4c2b9c5d60a9c172be6c7979c1f8ba5587 (patch) | |
| tree | ff3cdd17613265418ef2353ade192bf5a3600b74 | |
| parent | 87f674247089cbe8250f00d431885618e790fe83 (diff) | |
ata: sata_mv:- Handle return value of devm_ioremap.
[ Upstream commit 064c3db9c564cc5be514ac21fb4aa26cc33db746 ]
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
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
| -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 bd74ee555278..729f26322095 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -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); |