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 4.4-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:
mmc-dw_mmc-pltfm-fix-the-potential-null-pointer-dereference.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 45c7a4908a307a023e237a64a3eadcafc4836493 Mon Sep 17 00:00:00 2001
From: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
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@xxxxxxxxxxx>
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@xxxxxxxxxxx>
Reviewed-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -59,12 +59,13 @@ 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@xxxxxxxxxxx are
queue-4.4/mmc-dw_mmc-pltfm-fix-the-potential-null-pointer-dereference.patch
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