diff options
| author | Alexey Dobriyan <adobriyan@gmail.com> | 2010-02-08 20:17:43 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-08 20:17:43 +0100 |
| commit | 14c7dbe043d01a83a30633ab6b109ba2ac61d9f7 (patch) | |
| tree | 0358b6f285036f64c5f5cd6aac4bd2b0768fee8e /net/ipv6 | |
| parent | netfilter: nf_conntrack: restrict runtime expect hashsize modifications (diff) | |
| download | linux-14c7dbe043d01a83a30633ab6b109ba2ac61d9f7.tar.xz linux-14c7dbe043d01a83a30633ab6b109ba2ac61d9f7.zip | |
netfilter: xtables: compat out of scope fix
As per C99 6.2.4(2) when temporary table data goes out of scope,
the behaviour is undefined:
if (compat) {
struct foo tmp;
...
private = &tmp;
}
[dereference private]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/netfilter/ip6_tables.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c index 480d7f8c9802..8a7e0f52e177 100644 --- a/net/ipv6/netfilter/ip6_tables.c +++ b/net/ipv6/netfilter/ip6_tables.c @@ -1164,10 +1164,10 @@ static int get_info(struct net *net, void __user *user, int *len, int compat) if (t && !IS_ERR(t)) { struct ip6t_getinfo info; const struct xt_table_info *private = t->private; - #ifdef CONFIG_COMPAT + struct xt_table_info tmp; + if (compat) { - struct xt_table_info tmp; ret = compat_table_info(private, &tmp); xt_compat_flush_offsets(AF_INET6); private = &tmp; |