diff options
| author | Alexey Perevalov <a.perevalov@samsung.com> | 2014-07-31 13:14:05 (GMT) |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-07-31 17:55:47 (GMT) |
| commit | b6d04688040218d66edd8b221e43c67240b83119 (patch) | |
| tree | 9692e335071a91b87bb35af1aa18ebe23cbe4c46 | |
| parent | d24675cb1fb0f4f5b44ce4ed9cf5c17caf0efa6b (diff) | |
| download | linux-b6d04688040218d66edd8b221e43c67240b83119.tar.xz | |
netfilter: nfnetlink_acct: avoid using NFACCT_F_OVERQUOTA with bit helper functions
Bit helper functions were used for manipulation with NFACCT_F_OVERQUOTA,
but they are accepting pit position, but not a bit mask. As a result
not a third bit for NFACCT_F_OVERQUOTA was set, but forth. Such
behaviour was dangarous and could lead to unexpected overquota report
result.
Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | net/netfilter/nfnetlink_acct.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/netfilter/nfnetlink_acct.c b/net/netfilter/nfnetlink_acct.c index 11d863c..3ea0eac 100644 --- a/net/netfilter/nfnetlink_acct.c +++ b/net/netfilter/nfnetlink_acct.c @@ -41,6 +41,7 @@ struct nf_acct { }; #define NFACCT_F_QUOTA (NFACCT_F_QUOTA_PKTS | NFACCT_F_QUOTA_BYTES) +#define NFACCT_OVERQUOTA_BIT 2 /* NFACCT_F_OVERQUOTA */ static int nfnl_acct_new(struct sock *nfnl, struct sk_buff *skb, @@ -77,7 +78,8 @@ nfnl_acct_new(struct sock *nfnl, struct sk_buff *skb, smp_mb__before_atomic(); /* reset overquota flag if quota is enabled. */ if ((matching->flags & NFACCT_F_QUOTA)) - clear_bit(NFACCT_F_OVERQUOTA, &matching->flags); + clear_bit(NFACCT_OVERQUOTA_BIT, + &matching->flags); return 0; } return -EBUSY; @@ -150,7 +152,7 @@ nfnl_acct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, bytes = atomic64_xchg(&acct->bytes, 0); smp_mb__before_atomic(); if (acct->flags & NFACCT_F_QUOTA) - clear_bit(NFACCT_F_OVERQUOTA, &acct->flags); + clear_bit(NFACCT_OVERQUOTA_BIT, &acct->flags); } else { pkts = atomic64_read(&acct->pkts); bytes = atomic64_read(&acct->bytes); @@ -414,7 +416,7 @@ int nfnl_acct_overquota(const struct sk_buff *skb, struct nf_acct *nfacct) ret = now > *quota; if (now >= *quota && - !test_and_set_bit(NFACCT_F_OVERQUOTA, &nfacct->flags)) { + !test_and_set_bit(NFACCT_OVERQUOTA_BIT, &nfacct->flags)) { nfnl_overquota_report(nfacct); } |