From: Nathan Chancellor <natechancellor@gmail.com>
To: Pablo Neira Ayuso <pablo@netfilter.org>,
Jozsef Kadlecsik <kadlec@netfilter.org>,
Florian Westphal <fw@strlen.de>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
clang-built-linux@googlegroups.com,
Nathan Chancellor <natechancellor@gmail.com>
Subject: [PATCH net] netfilter: conntrack: Pass value of ctinfo to __nf_conntrack_update
Date: Wed, 27 May 2020 01:10:39 -0700 [thread overview]
Message-ID: <20200527081038.3506095-1-natechancellor@gmail.com> (raw)
Clang warns:
net/netfilter/nf_conntrack_core.c:2068:21: warning: variable 'ctinfo' is
uninitialized when used here [-Wuninitialized]
nf_ct_set(skb, ct, ctinfo);
^~~~~~
net/netfilter/nf_conntrack_core.c:2024:2: note: variable 'ctinfo' is
declared here
enum ip_conntrack_info ctinfo;
^
1 warning generated.
nf_conntrack_update was split up into nf_conntrack_update and
__nf_conntrack_update, where the assignment of ctifno is in
nf_conntrack_update but it is used in __nf_conntrack_update.
Pass the value of ctinfo from nf_conntrack_update to
__nf_conntrack_update so that uninitialized memory is not used
and everything works properly.
Fixes: ee04805ff54a ("netfilter: conntrack: make conntrack userspace helpers work again")
Link: https://github.com/ClangBuiltLinux/linux/issues/1039
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
net/netfilter/nf_conntrack_core.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 08e0c19f6b39..e3b054a2f796 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -2017,11 +2017,11 @@ static void nf_conntrack_attach(struct sk_buff *nskb, const struct sk_buff *skb)
}
static int __nf_conntrack_update(struct net *net, struct sk_buff *skb,
- struct nf_conn *ct)
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo)
{
struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple;
- enum ip_conntrack_info ctinfo;
struct nf_nat_hook *nat_hook;
unsigned int status;
int dataoff;
@@ -2146,7 +2146,7 @@ static int nf_conntrack_update(struct net *net, struct sk_buff *skb)
return 0;
if (!nf_ct_is_confirmed(ct)) {
- err = __nf_conntrack_update(net, skb, ct);
+ err = __nf_conntrack_update(net, skb, ct, ctinfo);
if (err < 0)
return err;
}
base-commit: a4976a3ef844c510ae9120290b23e9f3f47d6bce
--
2.27.0.rc0
next reply other threads:[~2020-05-27 8:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-27 8:10 Nathan Chancellor [this message]
2020-05-27 9:52 ` [PATCH net] netfilter: conntrack: Pass value of ctinfo to __nf_conntrack_update Pablo Neira Ayuso
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