linux-kernel - [ 096/124] regulator: Fix memory garbage dev

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Date:	Tue,  2 Apr 2013 15:11:18 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Russ Dill <Russ.Dill@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Jonghwan Choi <jhbird.choi@...sung.com>
Subject: [ 096/124] regulator: Fix memory garbage dev_err printout.

3.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Russ Dill <Russ.Dill@...com>

commit 9c7b4e8a8ad2624106fbf690fa97ab9c8c9bfa88 upstream.

commit dd8004af: 'regulator: core: Log when a device causes a voltage
constraint fail', tried to print out some information about the
check consumer min/max uV fixup, however, it uses a garbage pointer
left over from list_for_each_entry leading to boot messages in the
form:

'[    2.079890] <RANDOM ASCII>: Restricting voltage, 3735899821-4294967295uV'

Because it references regulator->dev, it could potentially read memory from
anywhere causing a panic.

This patch instead uses rdev and the updated min/max uV values.

Signed-off-by: Russ Dill <Russ.Dill@...com>
Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc: Jonghwan Choi <jhbird.choi@...sung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/regulator/core.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -200,8 +200,8 @@ static int regulator_check_consumers(str
 	}
 
 	if (*min_uV > *max_uV) {
-		dev_err(regulator->dev, "Restricting voltage, %u-%uuV\n",
-			regulator->min_uV, regulator->max_uV);
+		rdev_err(rdev, "Restricting voltage, %u-%uuV\n",
+			*min_uV, *max_uV);
 		return -EINVAL;
 	}
 


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