[src/trunk]: src/sys/netinet Fix kernel pointer leaks in sysctl_inpcblist.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/696bfbe7b54a
branches:  trunk
changeset: 994849:696bfbe7b54a
user:      maxv <maxv%NetBSD.org@localhost>
date:      Sat Nov 24 16:58:40 2018 +0000

description:
Fix kernel pointer leaks in sysctl_inpcblist.

diffstat:

 sys/netinet/tcp_usrreq.c |  23 +++++++++++++++--------
 1 files changed, 15 insertions(+), 8 deletions(-)

diffs (58 lines):

diff -r 512e2782f359 -r 696bfbe7b54a sys/netinet/tcp_usrreq.c
--- a/sys/netinet/tcp_usrreq.c  Sat Nov 24 16:41:48 2018 +0000
+++ b/sys/netinet/tcp_usrreq.c  Sat Nov 24 16:58:40 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: tcp_usrreq.c,v 1.219 2018/05/03 07:13:48 maxv Exp $    */
+/*     $NetBSD: tcp_usrreq.c,v 1.220 2018/11/24 16:58:40 maxv Exp $    */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -99,7 +99,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.219 2018/05/03 07:13:48 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.220 2018/11/24 16:58:40 maxv Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -1713,6 +1713,7 @@
 int
 sysctl_inpcblist(SYSCTLFN_ARGS)
 {
+       const bool allowaddr = get_expose_address(curproc);
        struct sockaddr_in *in;
        const struct inpcb *inp;
 #ifdef INET6
@@ -1798,9 +1799,12 @@
                                pcb.ki_tflags = tp->t_flags;
                        }
 
-                       pcb.ki_pcbaddr = PTRTOUINT64(inp);
-                       pcb.ki_ppcbaddr = PTRTOUINT64(inp->inp_ppcb);
-                       pcb.ki_sockaddr = PTRTOUINT64(inp->inp_socket);
+                       COND_SET_VALUE(pcb.ki_pcbaddr,
+                           PTRTOUINT64(inp), allowaddr);
+                       COND_SET_VALUE(pcb.ki_ppcbaddr,
+                           PTRTOUINT64(inp->inp_ppcb), allowaddr);
+                       COND_SET_VALUE(pcb.ki_sockaddr,
+                           PTRTOUINT64(inp->inp_socket), allowaddr);
 
                        pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc;
                        pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc;
@@ -1835,9 +1839,12 @@
                                pcb.ki_tflags = tp->t_flags;
                        }
 
-                       pcb.ki_pcbaddr = PTRTOUINT64(in6p);
-                       pcb.ki_ppcbaddr = PTRTOUINT64(in6p->in6p_ppcb);
-                       pcb.ki_sockaddr = PTRTOUINT64(in6p->in6p_socket);
+                       COND_SET_VALUE(pcb.ki_pcbaddr,
+                           PTRTOUINT64(in6p), allowaddr);
+                       COND_SET_VALUE(pcb.ki_ppcbaddr,
+                           PTRTOUINT64(in6p->in6p_ppcb), allowaddr);
+                       COND_SET_VALUE(pcb.ki_sockaddr,
+                           PTRTOUINT64(in6p->in6p_socket), allowaddr);
 
                        pcb.ki_rcvq = in6p->in6p_socket->so_rcv.sb_cc;
                        pcb.ki_sndq = in6p->in6p_socket->so_snd.sb_cc;