[PATCH] drivers/staging/irda: fix max dup length for kstrndup

[Ma Shimiao]

If source string longer than max, kstrndup will alloc max+1 space.
So, we should make sure the result will not over limit.

Signed-off-by: Ma Shimiao <mashimiao.f...@cn.fujitsu.com>
---
 drivers/staging/irda/net/irias_object.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/irda/net/irias_object.c 
b/drivers/staging/irda/net/irias_object.c
index 53b86d0e1630..b626f796a3ff 100644
--- a/drivers/staging/irda/net/irias_object.c
+++ b/drivers/staging/irda/net/irias_object.c
@@ -56,7 +56,7 @@ struct ias_object *irias_new_object( char *name, int id)
        }
 
        obj->magic = IAS_OBJECT_MAGIC;
-       obj->name = kstrndup(name, IAS_MAX_CLASSNAME, GFP_ATOMIC);
+       obj->name = kstrndup(name, IAS_MAX_CLASSNAME - 1, GFP_ATOMIC);
        if (!obj->name) {
                net_warn_ratelimited("%s(), Unable to allocate name!\n",
                                     __func__);
@@ -326,7 +326,7 @@ void irias_add_integer_attrib(struct ias_object *obj, char 
*name, int value,
        }
 
        attrib->magic = IAS_ATTRIB_MAGIC;
-       attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC);
+       attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME - 1, GFP_ATOMIC);
 
        /* Insert value */
        attrib->value = irias_new_integer_value(value);
@@ -370,7 +370,7 @@ void irias_add_octseq_attrib(struct ias_object *obj, char 
*name, __u8 *octets,
        }
 
        attrib->magic = IAS_ATTRIB_MAGIC;
-       attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC);
+       attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME - 1, GFP_ATOMIC);
 
        attrib->value = irias_new_octseq_value( octets, len);
        if (!attrib->name || !attrib->value) {
@@ -412,7 +412,7 @@ void irias_add_string_attrib(struct ias_object *obj, char 
*name, char *value,
        }
 
        attrib->magic = IAS_ATTRIB_MAGIC;
-       attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME, GFP_ATOMIC);
+       attrib->name = kstrndup(name, IAS_MAX_ATTRIBNAME - 1, GFP_ATOMIC);
 
        attrib->value = irias_new_string_value(value);
        if (!attrib->name || !attrib->value) {
@@ -468,7 +468,7 @@ struct ias_value *irias_new_string_value(char *string)
 
        value->type = IAS_STRING;
        value->charset = CS_ASCII;
-       value->t.string = kstrndup(string, IAS_MAX_STRING, GFP_ATOMIC);
+       value->t.string = kstrndup(string, IAS_MAX_STRING - 1, GFP_ATOMIC);
        if (!value->t.string) {
                net_warn_ratelimited("%s: Unable to kmalloc!\n", __func__);
                kfree(value);
-- 
2.13.6