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| author | Eric W. Biederman <ebiederm@xmission.com> | 2014-04-23 14:26:25 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-04-24 13:44:53 -0400 |
| commit | a53b72c83a4216f2eb883ed45a0cbce014b8e62d (patch) | |
| tree | e5a7f73a70a53c3485f3147de60f7c77b1ab7f4f /net/packet/diag.c | |
| parent | 5187cd055b6e81fc6526109456f8b20623148d5f (diff) | |
| download | linux-a53b72c83a4216f2eb883ed45a0cbce014b8e62d.tar.gz linux-a53b72c83a4216f2eb883ed45a0cbce014b8e62d.tar.bz2 linux-a53b72c83a4216f2eb883ed45a0cbce014b8e62d.zip | |
net: Move the permission check in sock_diag_put_filterinfo to packet_diag_dump
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>
Diffstat (limited to 'net/packet/diag.c')
| -rw-r--r-- | net/packet/diag.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/packet/diag.c b/net/packet/diag.c index 435ff99ba8c7..b34d0de24091 100644 --- a/net/packet/diag.c +++ b/net/packet/diag.c @@ -128,6 +128,7 @@ static int pdiag_put_fanout(struct packet_sock *po, struct sk_buff *nlskb) static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct packet_diag_req *req, + bool may_report_filterinfo, struct user_namespace *user_ns, u32 portid, u32 seq, u32 flags, int sk_ino) { @@ -172,7 +173,8 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, goto out_nlmsg_trim; if ((req->pdiag_show & PACKET_SHOW_FILTER) && - sock_diag_put_filterinfo(sk, skb, PACKET_DIAG_FILTER)) + sock_diag_put_filterinfo(may_report_filterinfo, sk, skb, + PACKET_DIAG_FILTER)) goto out_nlmsg_trim; return nlmsg_end(skb, nlh); @@ -188,9 +190,11 @@ static int packet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) struct packet_diag_req *req; struct net *net; struct sock *sk; + bool may_report_filterinfo; net = sock_net(skb->sk); req = nlmsg_data(cb->nlh); + may_report_filterinfo = ns_capable(net->user_ns, CAP_NET_ADMIN); mutex_lock(&net->packet.sklist_lock); sk_for_each(sk, &net->packet.sklist) { @@ -200,6 +204,7 @@ static int packet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) goto next; if (sk_diag_fill(sk, skb, req, + may_report_filterinfo, sk_user_ns(NETLINK_CB(cb->skb).sk), NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, NLM_F_MULTI, |