From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: [PATCH] netfilter: conntrack: remove uninitialized shadow variable Date: Mon, 9 May 2016 21:47:23 +0200 Message-ID: <1462823254-3137116-1-git-send-email-arnd@arndb.de> Cc: Arnd Bergmann , Florian Westphal , Daniel Borkmann , Sasha Levin , netfilter-devel@vger.kernel.org, coreteam@netfilter.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Pablo Neira Ayuso , Patrick McHardy , Jozsef Kadlecsik , "David S. Miller" Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netfilter-devel.vger.kernel.org A recent commit introduced an unconditional use of an uninitialized variable, as reported in this gcc warning: net/netfilter/nf_conntrack_core.c: In function '__nf_conntrack_confirm': net/netfilter/nf_conntrack_core.c:632:33: error: 'ctinfo' may be used uninitialized in this function [-Werror=maybe-uninitialized] bytes = atomic64_read(&counter[CTINFO2DIR(ctinfo)].bytes); ^ net/netfilter/nf_conntrack_core.c:628:26: note: 'ctinfo' was declared here enum ip_conntrack_info ctinfo; The problem is that a local variable shadows the function parameter. This removes the local variable, which looks like what Pablo originally intended. Signed-off-by: Arnd Bergmann Fixes: 71d8c47fc653 ("netfilter: conntrack: introduce clash resolution on insertion race") --- net/netfilter/nf_conntrack_core.c | 1 - 1 file changed, 1 deletion(-) diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index f58a70410c69..157ffa667395 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -625,7 +625,6 @@ static void nf_ct_acct_merge(struct nf_conn *ct, enum ip_conntrack_info ctinfo, acct = nf_conn_acct_find(loser_ct); if (acct) { struct nf_conn_counter *counter = acct->counter; - enum ip_conntrack_info ctinfo; unsigned int bytes; /* u32 should be fine since we must have seen one packet. */ -- 2.7.0