This is a note to let you know that I've just added the patch titled
ata: sata_mv:- Handle return value of devm_ioremap.
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ata-sata_mv-handle-return-value-of-devm_ioremap.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 064c3db9c564cc5be514ac21fb4aa26cc33db746 Mon Sep 17 00:00:00 2001
From: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
Date: Mon, 12 Dec 2016 23:13:27 +0530
Subject: ata: sata_mv:- Handle return value of devm_ioremap.
From: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/ata/sata_mv.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -4121,6 +4121,9 @@ static int mv_platform_probe(struct plat
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);
Patches currently in stable-queue which might be from arvind.yadav.cs@xxxxxxxxx are
queue-4.4/ata-sata_mv-handle-return-value-of-devm_ioremap.patch
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