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net: Move the permission check in sock_diag_put_filterinfo to packet_diag_dump

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The permission check in sock_diag_put_filterinfo is wrong, and it is so removed
from it's sources it is not clear why it is wrong.  Move the computation
into packet_diag_dump and pass a bool of the result into sock_diag_filterinfo.

This does not yet correct the capability check but instead simply moves it to make
it clear what is going on.

Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2014-04-23 14:26:25 -07:00 • committed by David S. Miller
commit a53b72c83a
3 changed files with 9 additions and 4 deletions
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4
net/core/sock_diag.c
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@ -49,7 +49,7 @@ int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attrtype)
}
EXPORT_SYMBOL_GPL(sock_diag_put_meminfo);
int sock_diag_put_filterinfo(struct sock *sk,
int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk,
struct sk_buff *skb, int attrtype)
{
struct sock_fprog_kern *fprog;
@ -58,7 +58,7 @@ int sock_diag_put_filterinfo(struct sock *sk,
unsigned int flen;
int err = 0;
if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
if (!may_report_filterinfo) {
nla_reserve(skb, attrtype, 0);
return 0;
}