Patch "mmc: dw_mmc-pltfm: fix the potential NULL pointer dereference" has been added to the 4.8-stable tree

Patch "mmc: dw_mmc-pltfm: fix the potential NULL pointer dereference" has been added to the 4.8-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    mmc: dw_mmc-pltfm: fix the potential NULL pointer dereference

to the 4.8-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:
     mmc-dw_mmc-pltfm-fix-the-potential-null-pointer-dereference.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 45c7a4908a307a023e237a64a3eadcafc4836493 Mon Sep 17 00:00:00 2001
From: Jaehoon Chung <jh80.chung@samsung.com>
Date: Fri, 21 Oct 2016 19:57:57 +0900
Subject: mmc: dw_mmc-pltfm: fix the potential NULL pointer dereference

From: Jaehoon Chung <jh80.chung@samsung.com>

commit 45c7a4908a307a023e237a64a3eadcafc4836493 upstream.

platform_get_resource can be returned the NULL pointer.
Then regs->start should be referred to NULL Pointer.
devm_ioremap_resource() checks whether res is NULL or not.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mmc/host/dw_mmc-pltfm.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/mmc/host/dw_mmc-pltfm.c
+++ b/drivers/mmc/host/dw_mmc-pltfm.c
@@ -46,12 +46,13 @@ int dw_mci_pltfm_register(struct platfor
 	host->pdata = pdev->dev.platform_data;
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	/* Get registers' physical base address */
-	host->phy_regs = regs->start;
 	host->regs = devm_ioremap_resource(&pdev->dev, regs);
 	if (IS_ERR(host->regs))
 		return PTR_ERR(host->regs);
 
+	/* Get registers' physical base address */
+	host->phy_regs = regs->start;
+
 	platform_set_drvdata(pdev, host);
 	return dw_mci_probe(host);
 }


Patches currently in stable-queue which might be from jh80.chung@samsung.com are

queue-4.8/mmc-dw_mmc-pltfm-fix-the-potential-null-pointer-dereference.patch