[NETFILTER]: nfnetlink: remove duplicate checks in nfnetlink_check_attributes

Remove nfnetlink_check_attributes duplicates message size and callback
id checks. nfnetlink_find_client and nfnetlink_rcv_msg already do
such checks.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 8 deletions

diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index c8b4f0d29df3..9d33807ec16d 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -149,17 +149,10 @@ static int
 nfnetlink_check_attributes(struct nfnetlink_subsystem *subsys,
                            struct nlmsghdr *nlh, struct nfattr *cda[])
 {
-        int min_len;
+        int min_len = NLMSG_SPACE(sizeof(struct nfgenmsg));
         u_int16_t attr_count;
         u_int8_t cb_id = NFNL_MSG_TYPE(nlh->nlmsg_type);
 
-        if (unlikely(cb_id >= subsys->cb_count))
-                return -EINVAL;
-
-        min_len = NLMSG_SPACE(sizeof(struct nfgenmsg));
-        if (unlikely(nlh->nlmsg_len < min_len))
-                return -EINVAL;
-
         attr_count = subsys->cb[cb_id].attr_count;
         memset(cda, 0, sizeof(struct nfattr *) * attr_count);