userns: Print out socket uids in a user namespace aware fashion.

Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Sridhar Samudrala <sri@us.ibm.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

include/net/tcp.h

@@ -1509,7 +1509,8 @@ struct tcp_iter_state {
 	sa_family_t		family;
 	enum tcp_seq_states	state;
 	struct sock		*syn_wait_sk;
-	int			bucket, offset, sbucket, num, uid;
+	int			bucket, offset, sbucket, num;
+	kuid_t			uid;
 	loff_t			last_pos;
 };
 

init/Kconfig

@@ -942,10 +942,7 @@ config UIDGID_CONVERTED
 	depends on PROC_EVENTS = n
 
 	# Networking
-	depends on PACKET = n
 	depends on NET_9P = n
-	depends on IPX = n
-	depends on PHONET = n
 	depends on NET_CLS_FLOW = n
 	depends on NETFILTER_XT_MATCH_OWNER = n
 	depends on NETFILTER_XT_MATCH_RECENT = n
@@ -953,14 +950,11 @@ config UIDGID_CONVERTED
 	depends on NETFILTER_NETLINK_LOG = n
 	depends on INET = n
 	depends on IPV6 = n
-	depends on IP_SCTP = n
 	depends on AF_RXRPC = n
-	depends on LLC2 = n
 	depends on NET_KEY = n
 	depends on INET_DIAG = n
 	depends on DNS_RESOLVER = n
 	depends on AX25 = n
-	depends on ATALK = n
 
 	# Filesystems
 	depends on USB_GADGETFS = n

net/appletalk/atalk_proc.c

@@ -183,7 +183,8 @@ static int atalk_seq_socket_show(struct seq_file *seq, void *v)
 		   ntohs(at->dest_net), at->dest_node, at->dest_port,
 		   sk_wmem_alloc_get(s),
 		   sk_rmem_alloc_get(s),
-		   s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
+		   s->sk_state,
+		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(s)));
 out:
 	return 0;
 }

net/ipv4/ping.c

@@ -845,7 +845,9 @@ static void ping_format_sock(struct sock *sp, struct seq_file *f,
 		bucket, src, srcp, dest, destp, sp->sk_state,
 		sk_wmem_alloc_get(sp),
 		sk_rmem_alloc_get(sp),
-		0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
+		0, 0L, 0,
+		from_kuid_munged(seq_user_ns(f), sock_i_uid(sp)),
+		0, sock_i_ino(sp),
 		atomic_read(&sp->sk_refcnt), sp,
 		atomic_read(&sp->sk_drops), len);
 }

net/ipv4/raw.c

@@ -992,7 +992,9 @@ static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
 		i, src, srcp, dest, destp, sp->sk_state,
 		sk_wmem_alloc_get(sp),
 		sk_rmem_alloc_get(sp),
-		0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
+		0, 0L, 0,
+		from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
+		0, sock_i_ino(sp),
 		atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
 }
 

net/ipv4/tcp_ipv4.c

@@ -2382,7 +2382,7 @@ void tcp_proc_unregister(struct net *net, struct tcp_seq_afinfo *afinfo)
 EXPORT_SYMBOL(tcp_proc_unregister);
 
 static void get_openreq4(const struct sock *sk, const struct request_sock *req,
-			 struct seq_file *f, int i, int uid, int *len)
+			 struct seq_file *f, int i, kuid_t uid, int *len)
 {
 	const struct inet_request_sock *ireq = inet_rsk(req);
 	int ttd = req->expires - jiffies;
@@ -2399,7 +2399,7 @@ static void get_openreq4(const struct sock *sk, const struct request_sock *req,
 		1,    /* timers active (only the expire timer) */
 		jiffies_to_clock_t(ttd),
 		req->retrans,
-		uid,
+		from_kuid_munged(seq_user_ns(f), uid),
 		0,  /* non standard timer */
 		0, /* open_requests have no inode */
 		atomic_read(&sk->sk_refcnt),
@@ -2450,7 +2450,7 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len)
 		timer_active,
 		jiffies_to_clock_t(timer_expires - jiffies),
 		icsk->icsk_retransmits,
-		sock_i_uid(sk),
+		from_kuid_munged(seq_user_ns(f), sock_i_uid(sk)),
 		icsk->icsk_probes_out,
 		sock_i_ino(sk),
 		atomic_read(&sk->sk_refcnt), sk,

net/ipv4/udp.c

@@ -2110,7 +2110,9 @@ static void udp4_format_sock(struct sock *sp, struct seq_file *f,
 		bucket, src, srcp, dest, destp, sp->sk_state,
 		sk_wmem_alloc_get(sp),
 		sk_rmem_alloc_get(sp),
-		0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
+		0, 0L, 0,
+		from_kuid_munged(seq_user_ns(f), sock_i_uid(sp)),
+		0, sock_i_ino(sp),
 		atomic_read(&sp->sk_refcnt), sp,
 		atomic_read(&sp->sk_drops), len);
 }

net/ipv6/raw.c

@@ -1251,7 +1251,8 @@ static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
 		   sk_wmem_alloc_get(sp),
 		   sk_rmem_alloc_get(sp),
 		   0, 0L, 0,
-		   sock_i_uid(sp), 0,
+		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
+		   0,
 		   sock_i_ino(sp),
 		   atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
 }

net/ipv6/tcp_ipv6.c

@@ -1803,7 +1803,7 @@ static void tcp_v6_destroy_sock(struct sock *sk)
 #ifdef CONFIG_PROC_FS
 /* Proc filesystem TCPv6 sock list dumping. */
 static void get_openreq6(struct seq_file *seq,
-			 const struct sock *sk, struct request_sock *req, int i, int uid)
+			 const struct sock *sk, struct request_sock *req, int i, kuid_t uid)
 {
 	int ttd = req->expires - jiffies;
 	const struct in6_addr *src = &inet6_rsk(req)->loc_addr;
@@ -1827,7 +1827,7 @@ static void get_openreq6(struct seq_file *seq,
 		   1,   /* timers active (only the expire timer) */
 		   jiffies_to_clock_t(ttd),
 		   req->retrans,
-		   uid,
+		   from_kuid_munged(seq_user_ns(seq), uid),
 		   0,  /* non standard timer */
 		   0, /* open_requests have no inode */
 		   0, req);
@@ -1877,7 +1877,7 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
 		   timer_active,
 		   jiffies_to_clock_t(timer_expires - jiffies),
 		   icsk->icsk_retransmits,
-		   sock_i_uid(sp),
+		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
 		   icsk->icsk_probes_out,
 		   sock_i_ino(sp),
 		   atomic_read(&sp->sk_refcnt), sp,

net/ipv6/udp.c

@@ -1458,7 +1458,8 @@ static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket
 		   sk_wmem_alloc_get(sp),
 		   sk_rmem_alloc_get(sp),
 		   0, 0L, 0,
-		   sock_i_uid(sp), 0,
+		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
+		   0,
 		   sock_i_ino(sp),
 		   atomic_read(&sp->sk_refcnt), sp,
 		   atomic_read(&sp->sk_drops));

net/ipx/ipx_proc.c

@@ -217,7 +217,8 @@ static int ipx_seq_socket_show(struct seq_file *seq, void *v)
 	seq_printf(seq, "%08X  %08X  %02X     %03d\n",
 		   sk_wmem_alloc_get(s),
 		   sk_rmem_alloc_get(s),
-		   s->sk_state, SOCK_INODE(s->sk_socket)->i_uid);
+		   s->sk_state,
+		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(s)));
 out:
 	return 0;
 }

net/key/af_key.c

@@ -3661,7 +3661,7 @@ static int pfkey_seq_show(struct seq_file *f, void *v)
 			       atomic_read(&s->sk_refcnt),
 			       sk_rmem_alloc_get(s),
 			       sk_wmem_alloc_get(s),
-			       sock_i_uid(s),
+			       from_kuid_munged(seq_user_ns(f), sock_i_uid(s)),
 			       sock_i_ino(s)
 			       );
 	return 0;

net/llc/llc_proc.c

@@ -151,7 +151,7 @@ static int llc_seq_socket_show(struct seq_file *seq, void *v)
 		   sk_wmem_alloc_get(sk),
 		   sk_rmem_alloc_get(sk) - llc->copied_seq,
 		   sk->sk_state,
-		   sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_uid : -1,
+		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 		   llc->link);
 out:
 	return 0;

net/packet/af_packet.c

@@ -3846,7 +3846,7 @@ static int packet_seq_show(struct seq_file *seq, void *v)
 			   po->ifindex,
 			   po->running,
 			   atomic_read(&s->sk_rmem_alloc),
-			   sock_i_uid(s),
+			   from_kuid_munged(seq_user_ns(seq), sock_i_uid(s)),
 			   sock_i_ino(s));
 	}
 

net/phonet/socket.c

@@ -612,7 +612,8 @@ static int pn_sock_seq_show(struct seq_file *seq, void *v)
 			sk->sk_protocol, pn->sobject, pn->dobject,
 			pn->resource, sk->sk_state,
 			sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk),
-			sock_i_uid(sk), sock_i_ino(sk),
+			from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
+			sock_i_ino(sk),
 			atomic_read(&sk->sk_refcnt), sk,
 			atomic_read(&sk->sk_drops), &len);
 	}
@@ -796,7 +797,8 @@ static int pn_res_seq_show(struct seq_file *seq, void *v)
 		struct sock *sk = *psk;
 
 		seq_printf(seq, "%02X %5d %lu%n",
-			   (int) (psk - pnres.sk), sock_i_uid(sk),
+			   (int) (psk - pnres.sk),
+			   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 			   sock_i_ino(sk), &len);
 	}
 	seq_printf(seq, "%*s\n", 63 - len, "");

net/sctp/proc.c

@@ -216,7 +216,8 @@ static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 		seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
 			   sctp_sk(sk)->type, sk->sk_state, hash,
 			   epb->bind_addr.port,
-			   sock_i_uid(sk), sock_i_ino(sk));
+			   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
+			   sock_i_ino(sk));
 
 		sctp_seq_dump_local_addrs(seq, epb);
 		seq_printf(seq, "\n");
@@ -324,7 +325,8 @@ static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 			   assoc->assoc_id,
 			   assoc->sndbuf_used,
 			   atomic_read(&assoc->rmem_alloc),
-			   sock_i_uid(sk), sock_i_ino(sk),
+			   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
+			   sock_i_ino(sk),
 			   epb->bind_addr.port,
 			   assoc->peer.port);
 		seq_printf(seq, " ");