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From:   Dominique Martinet <asmadeus@codewreck.org>
Cc:     Dominique Martinet <asmadeus@codewreck.org>,
        Gustavo Padovan <gustavo@padovan.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Sean Paul <seanpaul@chromium.org>,
        David Airlie <airlied@linux.ie>,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: =?UTF-8?q?=5BPATCH=2003/18=5D=20drm=5Fproperty=3A=20change=20strncpy+truncation=20to=20strlcpy?=
Date:   Fri, 13 Jul 2018 03:25:16 +0200
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Using strlcpy fixes this new gcc warning:
    drivers/gpu/drm/drm_property.c: In function ‘drm_property_create’:
    drivers/gpu/drm/drm_property.c:125:2: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
      strncpy(property->name, name, DRM_PROP_NAME_LEN);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Generated by scripts/coccinelle/misc/strncpy_truncation.cocci

Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
---

Please see https://marc.info/?l=linux-kernel&m=153144450722324&w=2 (the
first patch of the serie) for the motivation behind this patch

 drivers/gpu/drm/drm_property.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_property.c b/drivers/gpu/drm/drm_property.c
index cdb10f885a4f..8f0ccfa91f8b 100644
--- a/drivers/gpu/drm/drm_property.c
+++ b/drivers/gpu/drm/drm_property.c
@@ -122,8 +122,7 @@ struct drm_property *drm_property_create(struct drm_device *dev,
 	property->num_values = num_values;
 	INIT_LIST_HEAD(&property->enum_list);
 
-	strncpy(property->name, name, DRM_PROP_NAME_LEN);
-	property->name[DRM_PROP_NAME_LEN-1] = '\0';
+	strlcpy(property->name, name, DRM_PROP_NAME_LEN);
 
 	list_add_tail(&property->head, &dev->mode_config.property_list);
 
@@ -416,8 +415,7 @@ int drm_property_add_enum(struct drm_property *property,
 	if (!prop_enum)
 		return -ENOMEM;
 
-	strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
-	prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
+	strlcpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
 	prop_enum->value = value;
 
 	property->values[index] = value;
-- 
2.17.1