netfilter: Fix several warnings in compat_mtw_from_user().

Kill set but not used 'entry_offset'.

Add a default case to the switch statement so the compiler
can see that we always initialize off and size_kern before
using them.

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

1 files changed, 4 insertions, 2 deletions

diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 1a92b369c820..2b5ca1a0054d 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1883,14 +1883,13 @@ static int compat_mtw_from_user(struct compat_ebt_entry_mwt *mwt,
         struct xt_target *wt;
         void *dst = NULL;
         int off, pad = 0;
-        unsigned int size_kern, entry_offset, match_size = mwt->match_size;
+        unsigned int size_kern, match_size = mwt->match_size;
 
         strlcpy(name, mwt->u.name, sizeof(name));
 
         if (state->buf_kern_start)
                 dst = state->buf_kern_start + state->buf_kern_offset;
 
-        entry_offset = (unsigned char *) mwt - base;
         switch (compat_mwt) {
         case EBT_COMPAT_MATCH:
                 match = try_then_request_module(xt_find_match(NFPROTO_BRIDGE,
@@ -1933,6 +1932,9 @@ static int compat_mtw_from_user(struct compat_ebt_entry_mwt *mwt,
                 size_kern = wt->targetsize;
                 module_put(wt->me);
                 break;
+
+        default:
+                return -EINVAL;
         }
 
         state->buf_kern_offset += match_size + off;