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| author | Florian Westphal <fw@strlen.de> | 2022-01-07 05:03:22 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-01-09 23:30:13 +0100 |
| commit | 719774377622bc4025d2a74f551b5dc2158c6c30 (patch) | |
| tree | 8fbe7d875fbdaf8fcd909f15b230728c8c8b5baa /net/sched/act_ct.c | |
| parent | 613a0c67d12f33dcbeec2836f5fe60d05b4c18c0 (diff) | |
| download | linux-719774377622bc4025d2a74f551b5dc2158c6c30.tar.gz linux-719774377622bc4025d2a74f551b5dc2158c6c30.tar.bz2 linux-719774377622bc4025d2a74f551b5dc2158c6c30.zip | |
netfilter: conntrack: convert to refcount_t api
Convert nf_conn reference counting from atomic_t to refcount_t based api.
refcount_t api provides more runtime sanity checks and will warn on
certain constructs, e.g. refcount_inc() on a zero reference count, which
usually indicates use-after-free.
For this reason template allocation is changed to init the refcount to
1, the subsequenct add operations are removed.
Likewise, init_conntrack() is changed to set the initial refcount to 1
instead refcount_inc().
This is safe because the new entry is not (yet) visible to other cpus.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/sched/act_ct.c')
| -rw-r--r-- | net/sched/act_ct.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c index ab1810f2e660..3fa904cf8f27 100644 --- a/net/sched/act_ct.c +++ b/net/sched/act_ct.c @@ -1228,7 +1228,6 @@ static int tcf_ct_fill_params(struct net *net, return -ENOMEM; } __set_bit(IPS_CONFIRMED_BIT, &tmpl->status); - nf_conntrack_get(&tmpl->ct_general); p->tmpl = tmpl; return 0; |