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netfilter: nfnetlink_acct: dump unmodified nfacct flags

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NFNL_MSG_ACCT_GET_CTRZERO modifies dumped flags, in this case
client see unmodified (uncleared) counter value and cleared
overquota state - end user doesn't know anything about overquota state,
unless end user subscribed on overquota report.

Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Alexey Perevalov 2014-07-30 19:17:55 +04:00 committed by Pablo Neira Ayuso
parent d4da843e6f
commit d24675cb1f
1 changed files with 3 additions and 1 deletions
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4
net/netfilter/nfnetlink_acct.c
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@ -129,6 +129,7 @@ nfnl_acct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
struct nfgenmsg *nfmsg;
unsigned int flags = portid ? NLM_F_MULTI : 0;
u64 pkts, bytes;
u32 old_flags;
event |= NFNL_SUBSYS_ACCT << 8;
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
@ -143,6 +144,7 @@ nfnl_acct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
if (nla_put_string(skb, NFACCT_NAME, acct->name))
goto nla_put_failure;
old_flags = acct->flags;
if (type == NFNL_MSG_ACCT_GET_CTRZERO) {
pkts = atomic64_xchg(&acct->pkts, 0);
bytes = atomic64_xchg(&acct->bytes, 0);
@ -160,7 +162,7 @@ nfnl_acct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
if (acct->flags & NFACCT_F_QUOTA) {
u64 *quota = (u64 *)acct->data;
if (nla_put_be32(skb, NFACCT_FLAGS, htonl(acct->flags)) ||
if (nla_put_be32(skb, NFACCT_FLAGS, htonl(old_flags)) ||
nla_put_be64(skb, NFACCT_QUOTA, cpu_to_be64(*quota)))
goto nla_put_failure;
}