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| author | Florian Westphal <fw@strlen.de> | 2011-10-19 13:23:06 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2011-11-01 09:20:07 +0100 |
| commit | 2dad81adf2c49aa9f8bb7e7c48dff9261bd58396 (patch) | |
| tree | cb37d01250683d4114e3ea9e21851447d22128ba /net | |
| parent | e23ebf0fa9e1548c94d8277e393be97ba48faa06 (diff) | |
| download | linux-2dad81adf2c49aa9f8bb7e7c48dff9261bd58396.tar.gz linux-2dad81adf2c49aa9f8bb7e7c48dff9261bd58396.tar.bz2 linux-2dad81adf2c49aa9f8bb7e7c48dff9261bd58396.zip | |
netfilter: ipv6: fix afinfo->route refcnt leak on error
Several callers (h323 conntrack, xt_addrtype) assume that the
returned **dst only needs to be released if the function returns 0.
This is true for the ipv4 implementation, but not for the ipv6 one.
Instead of changing the users, change the ipv6 implementation
to behave like the ipv4 version by only providing the dst_entry result
in the success case.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/netfilter.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c index 30fcee465448..8992cf6651d4 100644 --- a/net/ipv6/netfilter.c +++ b/net/ipv6/netfilter.c @@ -100,9 +100,16 @@ static int nf_ip6_route(struct net *net, struct dst_entry **dst, .pinet6 = (struct ipv6_pinfo *) &fake_pinfo, }; const void *sk = strict ? &fake_sk : NULL; - - *dst = ip6_route_output(net, sk, &fl->u.ip6); - return (*dst)->error; + struct dst_entry *result; + int err; + + result = ip6_route_output(net, sk, &fl->u.ip6); + err = result->error; + if (err) + dst_release(result); + else + *dst = result; + return err; } __sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook, |