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 8ADA18F74 for ; Sun, 16 Jul 2023 20:13:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0BA06C433C7; Sun, 16 Jul 2023 20:13:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689538431; bh=qsJg9YPDUjZzXA3TtHmIlEflCklqK3BxKeCriXpz3g0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EpSjMWrBb1KtG3Rk8iQJ6bY9bjyJvqpuUikw+1Sok8BRJ9ihZvszVhzPTFZgsDS8R LT7sBj7+YF8bqKLWjUalxCaPo9ZD+mHk4q7iO8oXNITowH3xP/VpT0pirdnEYY+oZw /xxaKimwEjOLfDGEFGvSHY8aeHTIRRtkzvQ5bamM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wells Lu , Andy Shevchenko , Linus Walleij , Sasha Levin Subject: [PATCH 6.4 448/800] pinctrl: sunplus: Add check for kmalloc Date: Sun, 16 Jul 2023 21:45:01 +0200 Message-ID: <20230716194959.489810528@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194949.099592437@linuxfoundation.org> References: <20230716194949.099592437@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: Wells Lu [ Upstream commit a5961bed5429cf1134d7f539b4ed60317012f84d ] Fix Smatch static checker warning: potential null dereference 'configs'. (kmalloc returns null) Fixes: aa74c44be19c ("pinctrl: Add driver for Sunplus SP7021") Signed-off-by: Wells Lu Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/1685277277-12209-1-git-send-email-wellslutw@gmail.com Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin --- drivers/pinctrl/sunplus/sppctl.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/drivers/pinctrl/sunplus/sppctl.c b/drivers/pinctrl/sunplus/sppctl.c index 6bbbab3a6fdf3..e91ce5b5d5598 100644 --- a/drivers/pinctrl/sunplus/sppctl.c +++ b/drivers/pinctrl/sunplus/sppctl.c @@ -834,11 +834,6 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node int i, size = 0; list = of_get_property(np_config, "sunplus,pins", &size); - - if (nmG <= 0) - nmG = 0; - - parent = of_get_parent(np_config); *num_maps = size / sizeof(*list); /* @@ -866,10 +861,14 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node } } + if (nmG <= 0) + nmG = 0; + *map = kcalloc(*num_maps + nmG, sizeof(**map), GFP_KERNEL); - if (*map == NULL) + if (!(*map)) return -ENOMEM; + parent = of_get_parent(np_config); for (i = 0; i < (*num_maps); i++) { dt_pin = be32_to_cpu(list[i]); pin_num = FIELD_GET(GENMASK(31, 24), dt_pin); @@ -883,6 +882,8 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node (*map)[i].data.configs.num_configs = 1; (*map)[i].data.configs.group_or_pin = pin_get_name(pctldev, pin_num); configs = kmalloc(sizeof(*configs), GFP_KERNEL); + if (!configs) + goto sppctl_map_err; *configs = FIELD_GET(GENMASK(7, 0), dt_pin); (*map)[i].data.configs.configs = configs; @@ -896,6 +897,8 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node (*map)[i].data.configs.num_configs = 1; (*map)[i].data.configs.group_or_pin = pin_get_name(pctldev, pin_num); configs = kmalloc(sizeof(*configs), GFP_KERNEL); + if (!configs) + goto sppctl_map_err; *configs = SPPCTL_IOP_CONFIGS; (*map)[i].data.configs.configs = configs; @@ -965,6 +968,15 @@ static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node of_node_put(parent); dev_dbg(pctldev->dev, "%d pins mapped\n", *num_maps); return 0; + +sppctl_map_err: + for (i = 0; i < (*num_maps); i++) + if (((*map)[i].type == PIN_MAP_TYPE_CONFIGS_PIN) && + (*map)[i].data.configs.configs) + kfree((*map)[i].data.configs.configs); + kfree(*map); + of_node_put(parent); + return -ENOMEM; } static const struct pinctrl_ops sppctl_pctl_ops = { -- 2.39.2