From patchwork Sat Jan 5 05:54:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. 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R. Silva" To: Russell King , Linus Walleij Subject: [PATCH v2 1/2] ARM: integrator: impd1: fix NULL pointer dereference Message-ID: <418252fcd77472413ce15ac3df167e448a4defe9.1546667177.git.gustavo@embeddedor.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 189.250.130.205 X-Source-L: No X-Exim-ID: 1gfeud-004N6I-8m X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [189.250.130.205]:46922 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 7 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190104_215427_490692_C55C2E27 X-CRM114-Status: UNSURE ( 8.67 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "Gustavo A. R. Silva" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP There is a potential NULL pointer dereference in case devm_kzalloc() fails and returns NULL. Fix this by adding a NULL check on lookup. This issue was detected with the help of Coccinelle. Fixes: 684284b64aae ("ARM: integrator: add MMCI device to IM-PD1") Cc: stable@vger.kernel.org Signed-off-by: Gustavo A. R. Silva --- Changes in v2: - None. arch/arm/mach-integrator/impd1.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c index a109f6482413..eb0149561be2 100644 --- a/arch/arm/mach-integrator/impd1.c +++ b/arch/arm/mach-integrator/impd1.c @@ -392,6 +392,9 @@ static int __ref impd1_probe(struct lm_device *dev) lookup = devm_kzalloc(&dev->dev, sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup), GFP_KERNEL); + if (!lookup) + return -ENOMEM; + chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL); mmciname = kasprintf(GFP_KERNEL, "lm%x:00700", dev->id); lookup->dev_id = mmciname;