svn commit: r219206 - head/sys/net

[Bjoern A. Zeeb]

Author: bz
Date: Wed Mar  2 21:39:08 2011
New Revision: 219206
URL: http://svn.freebsd.org/changeset/base/219206

Log:
  Hide the outer IP addresses of a tunnel interfaces (gif(4), gre(4))
  from processes inside jails if the addresses do not belong to the jail.
  
  Originally reported by: Pieter de Boer via remko
  PR:		kern/151119
  Tested by:	Piotr KUCHARSKI (nospam 42.pl) [gif]
  MFC after:	1 week

Modified:
  head/sys/net/if_gif.c
  head/sys/net/if_gre.c

Modified: head/sys/net/if_gif.c
==============================================================================
--- head/sys/net/if_gif.c	Wed Mar  2 20:08:52 2011	(r219205)
+++ head/sys/net/if_gif.c	Wed Mar  2 21:39:08 2011	(r219206)
@@ -35,6 +35,7 @@
 
 #include <sys/param.h>
 #include <sys/systm.h>
+#include <sys/jail.h>
 #include <sys/kernel.h>
 #include <sys/malloc.h>
 #include <sys/mbuf.h>
@@ -817,6 +818,12 @@ gif_ioctl(ifp, cmd, data)
 		}
 		if (src->sa_len > size)
 			return EINVAL;
+		error = prison_if(curthread->td_ucred, src);
+		if (error != 0)
+			return (error);
+		error = prison_if(curthread->td_ucred, dst);
+		if (error != 0)
+			return (error);
 		bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
 #ifdef INET6
 		if (dst->sa_family == AF_INET6) {

Modified: head/sys/net/if_gre.c
==============================================================================
--- head/sys/net/if_gre.c	Wed Mar  2 20:08:52 2011	(r219205)
+++ head/sys/net/if_gre.c	Wed Mar  2 21:39:08 2011	(r219206)
@@ -46,6 +46,7 @@
 #include "opt_inet6.h"
 
 #include <sys/param.h>
+#include <sys/jail.h>
 #include <sys/kernel.h>
 #include <sys/malloc.h>
 #include <sys/module.h>
@@ -636,6 +637,9 @@ gre_ioctl(struct ifnet *ifp, u_long cmd,
 		si.sin_len = sizeof(struct sockaddr_in);
 		si.sin_addr.s_addr = sc->g_src.s_addr;
 		sa = sintosa(&si);
+		error = prison_if(curthread->td_ucred, sa);
+		if (error != 0)
+			break;
 		ifr->ifr_addr = *sa;
 		break;
 	case GREGADDRD:
@@ -644,6 +648,9 @@ gre_ioctl(struct ifnet *ifp, u_long cmd,
 		si.sin_len = sizeof(struct sockaddr_in);
 		si.sin_addr.s_addr = sc->g_dst.s_addr;
 		sa = sintosa(&si);
+		error = prison_if(curthread->td_ucred, sa);
+		if (error != 0)
+			break;
 		ifr->ifr_addr = *sa;
 		break;
 	case SIOCSIFPHYADDR:
@@ -707,8 +714,14 @@ gre_ioctl(struct ifnet *ifp, u_long cmd,
 		si.sin_family = AF_INET;
 		si.sin_len = sizeof(struct sockaddr_in);
 		si.sin_addr.s_addr = sc->g_src.s_addr;
+		error = prison_if(curthread->td_ucred, (struct sockaddr *)&si);
+		if (error != 0)
+			break;
 		memcpy(&lifr->addr, &si, sizeof(si));
 		si.sin_addr.s_addr = sc->g_dst.s_addr;
+		error = prison_if(curthread->td_ucred, (struct sockaddr *)&si);
+		if (error != 0)
+			break;
 		memcpy(&lifr->dstaddr, &si, sizeof(si));
 		break;
 	case SIOCGIFPSRCADDR:
@@ -723,6 +736,9 @@ gre_ioctl(struct ifnet *ifp, u_long cmd,
 		si.sin_family = AF_INET;
 		si.sin_len = sizeof(struct sockaddr_in);
 		si.sin_addr.s_addr = sc->g_src.s_addr;
+		error = prison_if(curthread->td_ucred, (struct sockaddr *)&si);
+		if (error != 0)
+			break;
 		bcopy(&si, &ifr->ifr_addr, sizeof(ifr->ifr_addr));
 		break;
 	case SIOCGIFPDSTADDR:
@@ -737,6 +753,9 @@ gre_ioctl(struct ifnet *ifp, u_long cmd,
 		si.sin_family = AF_INET;
 		si.sin_len = sizeof(struct sockaddr_in);
 		si.sin_addr.s_addr = sc->g_dst.s_addr;
+		error = prison_if(curthread->td_ucred, (struct sockaddr *)&si);
+		if (error != 0)
+			break;
 		bcopy(&si, &ifr->ifr_addr, sizeof(ifr->ifr_addr));
 		break;
 	case GRESKEY: