This is a note to let you know that I've just added the patch titled
regmap: fix NULL pointer dereference in _regmap_write/read
to the 3.17-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:
regmap-fix-null-pointer-dereference-in-_regmap_write-read.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5336be8416a71b5568d2cf54a2f2066abe9f2a53 Mon Sep 17 00:00:00 2001
From: Pankaj Dubey <pankaj.dubey@xxxxxxxxxxx>
Date: Sat, 27 Sep 2014 09:47:55 +0530
Subject: regmap: fix NULL pointer dereference in _regmap_write/read
From: Pankaj Dubey <pankaj.dubey@xxxxxxxxxxx>
commit 5336be8416a71b5568d2cf54a2f2066abe9f2a53 upstream.
If LOG_DEVICE is defined and map->dev is NULL it will lead to NULL
pointer dereference. This patch fixes this issue by adding check for
dev->NULL in all such places in regmap.c
Signed-off-by: Pankaj Dubey <pankaj.dubey@xxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/base/regmap/regmap.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1408,7 +1408,7 @@ int _regmap_write(struct regmap *map, un
}
#ifdef LOG_DEVICE
- if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
+ if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
dev_info(map->dev, "%x <= %x\n", reg, val);
#endif
@@ -2058,7 +2058,7 @@ static int _regmap_read(struct regmap *m
ret = map->reg_read(context, reg, val);
if (ret == 0) {
#ifdef LOG_DEVICE
- if (strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
+ if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
dev_info(map->dev, "%x => %x\n", reg, *val);
#endif
Patches currently in stable-queue which might be from pankaj.dubey@xxxxxxxxxxx are
queue-3.17/regmap-fix-null-pointer-dereference-in-_regmap_write-read.patch
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