From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754622AbbIBMTa (ORCPT ); Wed, 2 Sep 2015 08:19:30 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:48500 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754606AbbIBMT1 (ORCPT ); Wed, 2 Sep 2015 08:19:27 -0400 From: Mark Brown To: Sudip Mukherjee , Mark Brown Cc: linux-kernel@vger.kernel.org In-Reply-To: <1441190646-13693-1-git-send-email-sudipm.mukherjee@gmail.com> Message-Id: Date: Wed, 02 Sep 2015 13:19:20 +0100 X-SA-Exim-Connect-IP: 94.175.94.161 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Applied "regulator: core: fix possible NULL dereference" to the regulator tree X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on mezzanine.sirena.org.uk) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The patch regulator: core: fix possible NULL dereference has been applied to the regulator tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >>From 9f8df6adf6c53abfa10e243cb289c34eb18ec581 Mon Sep 17 00:00:00 2001 From: Sudip Mukherjee Date: Wed, 2 Sep 2015 16:14:06 +0530 Subject: [PATCH] regulator: core: fix possible NULL dereference We were checking rdev->supply for NULL after dereferencing it. Lets check for rdev->supply along with _regulator_is_enabled() and call regulator_enable() only if rdev->supply is not NULL. Signed-off-by: Sudip Mukherjee Signed-off-by: Mark Brown --- drivers/regulator/core.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index de9f272a0faf..7150ff6ef46b 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1422,11 +1422,10 @@ static int regulator_resolve_supply(struct regulator_dev *rdev) return ret; /* Cascade always-on state to supply */ - if (_regulator_is_enabled(rdev)) { + if (_regulator_is_enabled(rdev) && rdev->supply) { ret = regulator_enable(rdev->supply); if (ret < 0) { - if (rdev->supply) - _regulator_put(rdev->supply); + _regulator_put(rdev->supply); return ret; } } -- 2.5.0