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Make SIOCGIFADDR and related, as well as SIOCGIFADDR_IN6 and related

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jail-aware. Up to now we returned the first address of the interface
for SIOCGIFADDR w/o an ifr_addr in the query. This caused problems for
programs querying for an address but running inside a jail, as the
address returned usually did not belong to the jail.
Like for v6, if there was an ifr_addr given on v4, you could probe
for more addresses on the interfaces that you were not allowed to see
from inside a jail. Return an error (EADDRNOTAVAIL) in that case
now unless the address is on the given interface and valid for the
jail.

PR:		kern/114325
Reviewed by:	rwatson
MFC after:	4 weeks
This commit is contained in:
Bjoern A. Zeeb 2009-01-09 13:06:56 +00:00
parent 4e883c81d0
commit 5ce0eb7f08
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=186948
2 changed files with 13 additions and 1 deletions
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10
sys/netinet/in.c
View file

@ -41,7 +41,9 @@ __FBSDID("$FreeBSD$");
#include <sys/malloc.h>
#include <sys/priv.h>
#include <sys/socket.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/vimage.h>
@ -261,13 +263,19 @@ in_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp,
LIST_FOREACH(iap, INADDR_HASH(dst.s_addr), ia_hash)
if (iap->ia_ifp == ifp &&
iap->ia_addr.sin_addr.s_addr == dst.s_addr) {
ia = iap;
if (td == NULL || prison_check_ip4(
td->td_ucred, &dst))
ia = iap;
break;
}
if (ia == NULL)
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
iap = ifatoia(ifa);
if (iap->ia_addr.sin_family == AF_INET) {
if (td != NULL &&
!prison_check_ip4(td->td_ucred,
&iap->ia_addr.sin_addr))
continue;
ia = iap;
break;
}

4
sys/netinet6/in6.c
View file

@ -68,6 +68,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/jail.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
@ -329,6 +330,9 @@ in6_control(struct socket *so, u_long cmd, caddr_t data,
error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
if (error != 0)
return (error);
if (td != NULL && !prison_check_ip6(td->td_ucred,
&sa6->sin6_addr))
return (EADDRNOTAVAIL);
ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
} else
ia = NULL;