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authorAndrew Lutomirski <luto@amacapital.net>2014-04-17 06:41:34 +0200
committerDavid S. Miller <davem@davemloft.net>2014-04-22 18:49:39 +0200
commit78541c1dc60b65ecfce5a6a096fc260219d6784e (patch)
tree45afae9a1e20fbd72426404b1d110aef9cfd6104
parentMAINTAINERS: SXGBE authors update (diff)
downloadlinux-78541c1dc60b65ecfce5a6a096fc260219d6784e.tar.xz
linux-78541c1dc60b65ecfce5a6a096fc260219d6784e.zip
net: Fix ns_capable check in sock_diag_put_filterinfo
The caller needs capabilities on the namespace being queried, not on their own namespace. This is a security bug, although it likely has only a minor impact. Cc: stable@vger.kernel.org Signed-off-by: Andy Lutomirski <luto@amacapital.net> Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/sock_diag.h2
-rw-r--r--net/core/sock_diag.c4
-rw-r--r--net/packet/diag.c2
3 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/sock_diag.h b/include/linux/sock_diag.h
index 54f91d35e5fd..302ab805b0bb 100644
--- a/include/linux/sock_diag.h
+++ b/include/linux/sock_diag.h
@@ -23,7 +23,7 @@ int sock_diag_check_cookie(void *sk, __u32 *cookie);
void sock_diag_save_cookie(void *sk, __u32 *cookie);
int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr);
-int sock_diag_put_filterinfo(struct user_namespace *user_ns, struct sock *sk,
+int sock_diag_put_filterinfo(struct sock *sk,
struct sk_buff *skb, int attrtype);
#endif
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index d7af18859322..9deb6abd6cf6 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -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 user_namespace *user_ns, struct sock *sk,
+int sock_diag_put_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 user_namespace *user_ns, struct sock *sk,
unsigned int flen;
int err = 0;
- if (!ns_capable(user_ns, CAP_NET_ADMIN)) {
+ if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
nla_reserve(skb, attrtype, 0);
return 0;
}
diff --git a/net/packet/diag.c b/net/packet/diag.c
index 533ce4ff108a..435ff99ba8c7 100644
--- a/net/packet/diag.c
+++ b/net/packet/diag.c
@@ -172,7 +172,7 @@ 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(user_ns, sk, skb, PACKET_DIAG_FILTER))
+ sock_diag_put_filterinfo(sk, skb, PACKET_DIAG_FILTER))
goto out_nlmsg_trim;
return nlmsg_end(skb, nlh);