From 443a70d50bdc212e1292778e264ce3d0a85b896f Mon Sep 17 00:00:00 2001 From: Philip Craig Date: Tue, 29 Apr 2008 03:35:10 -0700 Subject: netfilter: nf_conntrack: padding breaks conntrack hash on ARM commit 0794935e "[NETFILTER]: nf_conntrack: optimize hash_conntrack()" results in ARM platforms hashing uninitialised padding. This padding doesn't exist on other architectures. Fix this by replacing NF_CT_TUPLE_U_BLANK() with memset() to ensure everything is initialised. There were only 4 bytes that NF_CT_TUPLE_U_BLANK() wasn't clearing anyway (or 12 bytes on ARM). Signed-off-by: Philip Craig Signed-off-by: David S. Miller --- include/net/netfilter/nf_conntrack_tuple.h | 10 ---------- net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c | 2 +- net/netfilter/nf_conntrack_core.c | 4 ++-- 3 files changed, 3 insertions(+), 13 deletions(-) diff --git a/include/net/netfilter/nf_conntrack_tuple.h b/include/net/netfilter/nf_conntrack_tuple.h index 1bb7087833d3..a6874ba22d54 100644 --- a/include/net/netfilter/nf_conntrack_tuple.h +++ b/include/net/netfilter/nf_conntrack_tuple.h @@ -107,16 +107,6 @@ struct nf_conntrack_tuple_mask } src; }; -/* This is optimized opposed to a memset of the whole structure. Everything we - * really care about is the source/destination unions */ -#define NF_CT_TUPLE_U_BLANK(tuple) \ - do { \ - (tuple)->src.u.all = 0; \ - (tuple)->dst.u.all = 0; \ - memset(&(tuple)->src.u3, 0, sizeof((tuple)->src.u3)); \ - memset(&(tuple)->dst.u3, 0, sizeof((tuple)->dst.u3)); \ - } while (0) - #ifdef __KERNEL__ static inline void nf_ct_dump_tuple_ip(const struct nf_conntrack_tuple *t) diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c index cacb9cb27dab..5a955c440364 100644 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c @@ -303,7 +303,7 @@ getorigdst(struct sock *sk, int optval, void __user *user, int *len) const struct nf_conntrack_tuple_hash *h; struct nf_conntrack_tuple tuple; - NF_CT_TUPLE_U_BLANK(&tuple); + memset(&tuple, 0, sizeof(tuple)); tuple.src.u3.ip = inet->rcv_saddr; tuple.src.u.tcp.port = inet->sport; tuple.dst.u3.ip = inet->daddr; diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 4eac65c74ed0..c4b1799da5d7 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -104,7 +104,7 @@ nf_ct_get_tuple(const struct sk_buff *skb, const struct nf_conntrack_l3proto *l3proto, const struct nf_conntrack_l4proto *l4proto) { - NF_CT_TUPLE_U_BLANK(tuple); + memset(tuple, 0, sizeof(*tuple)); tuple->src.l3num = l3num; if (l3proto->pkt_to_tuple(skb, nhoff, tuple) == 0) @@ -151,7 +151,7 @@ nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse, const struct nf_conntrack_l3proto *l3proto, const struct nf_conntrack_l4proto *l4proto) { - NF_CT_TUPLE_U_BLANK(inverse); + memset(inverse, 0, sizeof(*inverse)); inverse->src.l3num = orig->src.l3num; if (l3proto->invert_tuple(inverse, orig) == 0) -- cgit v1.2.2