selinux: Use kmemdup instead of kmalloc + memcpy

Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 425b9f9..a91d205 100644 (file)
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -268,10 +268,10 @@ int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
        if (!old_ctx)
                return 0;
 
-       new_ctx = kmalloc(sizeof(*old_ctx) + old_ctx->ctx_len, GFP_ATOMIC);
+       new_ctx = kmemdup(old_ctx, sizeof(*old_ctx) + old_ctx->ctx_len,
+                         GFP_ATOMIC);
        if (!new_ctx)
                return -ENOMEM;
-       memcpy(new_ctx, old_ctx, sizeof(*old_ctx) + old_ctx->ctx_len);
        atomic_inc(&selinux_xfrm_refcount);
        *new_ctxp = new_ctx;