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Re-enable network ioctls in capability mode

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This reverts a portion of 274579831b ("capsicum: Limit socket
operations in capability mode") as at least rtsol and dhcpcd rely on
being able to configure network interfaces while in capability mode.

Reported by:	bapt, Greg V
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Mark Johnston 2021-04-23 09:14:42 -04:00
parent 694407528f
commit 8e8f1cc9bb
7 changed files with 8 additions and 25 deletions
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5
contrib/capsicum-test/capmode.cc
View File

@ -227,6 +227,10 @@ FORK_TEST_F(WithFiles, AllowedSocketSyscallsIfRoot) {
// Interface configuration ioctls are not permitted in capability
// mode.
//
// This test is disabled for now as the corresponding kernel change was
// disabled.
#if 0
#ifdef __FreeBSD__
struct if_clonereq req;
@ -238,6 +242,7 @@ FORK_TEST_F(WithFiles, AllowedSocketSyscallsIfRoot) {
free(req.ifcr_buffer);
#endif
#endif
}
#ifdef HAVE_SEND_RECV_MMSG

2
sys/kern/sys_socket.c
View File

@ -271,7 +271,7 @@ soo_ioctl(struct file *fp, u_long cmd, void *data, struct ucred *active_cred,
error = ifioctl(so, cmd, data, td);
else if (IOCGROUP(cmd) == 'r') {
CURVNET_SET(so->so_vnet);
error = rtioctl_fib(cmd, data, so->so_fibnum, td);
error = rtioctl_fib(cmd, data, so->so_fibnum);
CURVNET_RESTORE();
} else {
CURVNET_SET(so->so_vnet);

9
sys/net/if.c
View File

@ -2968,15 +2968,6 @@ ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
bool shutdown;
#endif
/*
* Interface ioctls access a global namespace. There is currently no
* capability-based representation for interfaces, so the configuration
* interface is simply unaccessible from capability mode. If necessary,
* select ioctls may be permitted here.
*/
if (IN_CAPABILITY_MODE(td))
return (ECAPMODE);
CURVNET_SET(so->so_vnet);
#ifdef VIMAGE
/* Make sure the VNET is stable. */

5
sys/net/route.c
View File

@ -43,7 +43,6 @@
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/capsicum.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
@ -246,10 +245,8 @@ rib_add_redirect(u_int fibnum, struct sockaddr *dst, struct sockaddr *gateway,
* Routing table ioctl interface.
*/
int
rtioctl_fib(u_long req, caddr_t data, u_int fibnum, struct thread *td)
rtioctl_fib(u_long req, caddr_t data, u_int fibnum)
{
if (IN_CAPABILITY_MODE(td))
return (ECAPMODE);
/*
* If more ioctl commands are added here, make sure the proper

4
sys/net/route.h
View File

@ -431,13 +431,11 @@ void rt_updatemtu(struct ifnet *);
void rt_flushifroutes(struct ifnet *ifp);
struct thread;
/* XXX MRT NEW VERSIONS THAT USE FIBs
* For now the protocol indepedent versions are the same as the AF_INET ones
* but this will change..
*/
int rtioctl_fib(u_long, caddr_t, u_int, struct thread *);
int rtioctl_fib(u_long, caddr_t, u_int);
int rib_lookup_info(uint32_t, const struct sockaddr *, uint32_t, uint32_t,
struct rt_addrinfo *);
void rib_free_info(struct rt_addrinfo *info);

4
sys/netinet/in.c
View File

@ -36,7 +36,6 @@
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/capsicum.h>
#include <sys/eventhandler.h>
#include <sys/systm.h>
#include <sys/sockio.h>
@ -238,9 +237,6 @@ in_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp,
if (ifp == NULL)
return (EADDRNOTAVAIL);
if (td != NULL && IN_CAPABILITY_MODE(td))
return (ECAPMODE);
/*
* Filter out 4 ioctls we implement directly. Forward the rest
* to specific functions and ifp->if_ioctl().

4
sys/netinet6/in6.c
View File

@ -69,7 +69,6 @@ __FBSDID("$FreeBSD$");
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/capsicum.h>
#include <sys/eventhandler.h>
#include <sys/errno.h>
#include <sys/jail.h>
@ -255,9 +254,6 @@ in6_control(struct socket *so, u_long cmd, caddr_t data,
int error;
u_long ocmd = cmd;
if (td != NULL && IN_CAPABILITY_MODE(td))
return (ECAPMODE);
/*
* Compat to make pre-10.x ifconfig(8) operable.
*/