From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755611AbcEaGTn (ORCPT ); Tue, 31 May 2016 02:19:43 -0400 Received: from mail-pa0-f68.google.com ([209.85.220.68]:34005 "EHLO mail-pa0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752684AbcEaGTi (ORCPT ); Tue, 31 May 2016 02:19:38 -0400 From: Eduardo Valentin To: Rui Zhang Cc: Linux PM , LKML , Keerthy , Eduardo Valentin Subject: [PATCHv4 20/48] thermal: core: treat correctly the return value of *scanf calls Date: Mon, 30 May 2016 23:18:27 -0700 Message-Id: <1464675535-2433-21-git-send-email-edubezval@gmail.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1464675535-2433-1-git-send-email-edubezval@gmail.com> References: <1464675535-2433-1-git-send-email-edubezval@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch checks the return value of all calls to *scanf. The check is to simply match the number of expect inputs. The current code does not do any recovery in case the number of treated inputs are different than the expected. Therefore, keeping the same behavior. Cc: Zhang Rui Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin --- drivers/thermal/thermal_core.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 71fb762..9545e15 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -817,7 +817,7 @@ trip_point_type_show(struct device *dev, struct device_attribute *attr, if (!tz->ops->get_trip_type) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_type", &trip) != 1) return -EINVAL; result = tz->ops->get_trip_type(tz, trip, &type); @@ -849,7 +849,7 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr, if (!tz->ops->set_trip_temp) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) return -EINVAL; if (kstrtoint(buf, 10, &temperature)) @@ -875,7 +875,7 @@ trip_point_temp_show(struct device *dev, struct device_attribute *attr, if (!tz->ops->get_trip_temp) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip) != 1) return -EINVAL; ret = tz->ops->get_trip_temp(tz, trip, &temperature); @@ -897,7 +897,7 @@ trip_point_hyst_store(struct device *dev, struct device_attribute *attr, if (!tz->ops->set_trip_hyst) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) return -EINVAL; if (kstrtoint(buf, 10, &temperature)) @@ -924,7 +924,7 @@ trip_point_hyst_show(struct device *dev, struct device_attribute *attr, if (!tz->ops->get_trip_hyst) return -EPERM; - if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) + if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) return -EINVAL; ret = tz->ops->get_trip_hyst(tz, trip, &temperature); @@ -939,7 +939,7 @@ passive_store(struct device *dev, struct device_attribute *attr, struct thermal_zone_device *tz = to_thermal_zone(dev); int state; - if (!sscanf(buf, "%d\n", &state)) + if (sscanf(buf, "%d\n", &state) != 1) return -EINVAL; /* sanity check: values below 1000 millicelcius don't make sense @@ -1385,7 +1385,7 @@ thermal_cooling_device_cur_state_store(struct device *dev, unsigned long state; int result; - if (!sscanf(buf, "%ld\n", &state)) + if (sscanf(buf, "%ld\n", &state) != 1) return -EINVAL; if ((long)state < 0) -- 2.1.4