From: Arvind Yadav <arvind.yadav...@gmail.com>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
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...@gmail.com>
Signed-off-by: Tejun Heo <t...@kernel.org>
Signed-off-by: Jiri Slaby <jsl...@suse.cz>
---
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 dc9d4b1ea4ec..90a71cc5c910 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -4098,6 +4098,9 @@ 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);
--
2.12.0
