From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 939A51863 for ; Wed, 28 Dec 2022 14:55:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19006C433D2; Wed, 28 Dec 2022 14:55:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672239345; bh=j1ALrGnqB1XDxRqxmm5sH6hFPd/6VMxh/l/c1wBe1A4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MG9W0pBxtaLVxFp5ptDKS4dj84YDoGrF8cs4GrKIWwW7ZjuImF0vdBQfHg632AtVW H5txJaFnS71Ew9OVwqedzU5xq0CUt7W5yOgCTUvok0ShQT+WhQunBHVOWjjhpz1JsH AVEZYB0bJPLmTJ0+ACV64smuXPGnlWack1pVzp8Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hui Tang , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Miquel Raynal , Sasha Levin Subject: [PATCH 5.15 209/731] mtd: lpddr2_nvm: Fix possible null-ptr-deref Date: Wed, 28 Dec 2022 15:35:16 +0100 Message-Id: <20221228144302.616391393@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144256.536395940@linuxfoundation.org> References: <20221228144256.536395940@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Hui Tang [ Upstream commit 6bdd45d795adf9e73b38ced5e7f750cd199499ff ] It will cause null-ptr-deref when resource_size(add_range) invoked, if platform_get_resource() returns NULL. Fixes: 96ba9dd65788 ("mtd: lpddr: add driver for LPDDR2-NVM PCM memories") Signed-off-by: Hui Tang Acked-by: Uwe Kleine-König Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20221114090240.244172-1-tanghui20@huawei.com Signed-off-by: Sasha Levin --- drivers/mtd/lpddr/lpddr2_nvm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mtd/lpddr/lpddr2_nvm.c b/drivers/mtd/lpddr/lpddr2_nvm.c index 72f5c7b30079..add4386f99f0 100644 --- a/drivers/mtd/lpddr/lpddr2_nvm.c +++ b/drivers/mtd/lpddr/lpddr2_nvm.c @@ -433,6 +433,8 @@ static int lpddr2_nvm_probe(struct platform_device *pdev) /* lpddr2_nvm address range */ add_range = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!add_range) + return -ENODEV; /* Populate map_info data structure */ *map = (struct map_info) { -- 2.35.1