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Message-ID: <00a6c489-dc5b-d66f-f06d-b8785acb50e7@linode.com> Date: Mon, 12 Aug 2019 17:20:13 -0400 From: Todd Seidelmann <tseidelmann@...ode.com> To: netdev@...r.kernel.org Subject: [PATCH net] netfilter: ebtables: Fix argument order to ADD_COUNTER The ordering of arguments to the x_tables ADD_COUNTER macro appears to be wrong in ebtables (cf. ip_tables.c, ip6_tables.c, and arp_tables.c). This causes data corruption in the ebtables userspace tools because they get incorrect packet & byte counts from the kernel. --- net/bridge/netfilter/ebtables.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c index c8177a8..4096d8a 100644 --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -221,7 +221,7 @@ unsigned int ebt_do_table(struct sk_buff *skb, return NF_DROP; } - ADD_COUNTER(*(counter_base + i), 1, skb->len); + ADD_COUNTER(*(counter_base + i), skb->len, 1); /* these should only watch: not modify, nor tell us * what to do with the packet @@ -959,8 +959,8 @@ static void get_counters(const struct ebt_counter *oldcounters, continue; counter_base = COUNTER_BASE(oldcounters, nentries, cpu); for (i = 0; i < nentries; i++) - ADD_COUNTER(counters[i], counter_base[i].pcnt, - counter_base[i].bcnt); + ADD_COUNTER(counters[i], counter_base[i].bcnt, + counter_base[i].pcnt); } } @@ -1280,7 +1280,7 @@ static int do_update_counters(struct net *net, const char *name, /* we add to the counters of the first cpu */ for (i = 0; i < num_counters; i++) - ADD_COUNTER(t->private->counters[i], tmp[i].pcnt, tmp[i].bcnt); + ADD_COUNTER(t->private->counters[i], tmp[i].bcnt, tmp[i].pcnt); write_unlock_bh(&t->lock); ret = 0; -- 1.8.3.1
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