4a14441044
further refinement is required as some device drivers intended to be portable over FreeBSD versions rely on __FreeBSD_version to decide whether to include capability.h. MFC after: 3 weeks
175 lines
4.2 KiB
C
175 lines
4.2 KiB
C
/*-
|
|
* Copyright (c) 2013 The FreeBSD Foundation
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Pawel Jakub Dawidek under sponsorship from
|
|
* the FreeBSD Foundation.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_capsicum.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/capsicum.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/syscallsubr.h>
|
|
#include <sys/sysproto.h>
|
|
|
|
#include <security/audit/audit.h>
|
|
|
|
#include <compat/freebsd32/freebsd32_proto.h>
|
|
|
|
#ifdef CAPABILITIES
|
|
|
|
MALLOC_DECLARE(M_FILECAPS);
|
|
|
|
int
|
|
freebsd32_cap_enter(struct thread *td,
|
|
struct freebsd32_cap_enter_args *uap)
|
|
{
|
|
|
|
/*
|
|
* We do not have an equivalent of capabilities.conf for freebsd32
|
|
* compatibility, so do not allow capability mode for now.
|
|
*/
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
freebsd32_cap_ioctls_limit(struct thread *td,
|
|
struct freebsd32_cap_ioctls_limit_args *uap)
|
|
{
|
|
u_long *cmds;
|
|
uint32_t *cmds32;
|
|
size_t ncmds;
|
|
u_int i;
|
|
int error;
|
|
|
|
ncmds = uap->ncmds;
|
|
|
|
if (ncmds > 256) /* XXX: Is 256 sane? */
|
|
return (EINVAL);
|
|
|
|
if (ncmds == 0) {
|
|
cmds = NULL;
|
|
} else {
|
|
cmds32 = malloc(sizeof(cmds32[0]) * ncmds, M_FILECAPS, M_WAITOK);
|
|
error = copyin(uap->cmds, cmds32, sizeof(cmds32[0]) * ncmds);
|
|
if (error != 0) {
|
|
free(cmds32, M_FILECAPS);
|
|
return (error);
|
|
}
|
|
cmds = malloc(sizeof(cmds[0]) * ncmds, M_FILECAPS, M_WAITOK);
|
|
for (i = 0; i < ncmds; i++)
|
|
cmds[i] = cmds32[i];
|
|
free(cmds32, M_FILECAPS);
|
|
}
|
|
|
|
return (kern_cap_ioctls_limit(td, uap->fd, cmds, ncmds));
|
|
}
|
|
|
|
int
|
|
freebsd32_cap_ioctls_get(struct thread *td,
|
|
struct freebsd32_cap_ioctls_get_args *uap)
|
|
{
|
|
struct filedesc *fdp;
|
|
struct filedescent *fdep;
|
|
uint32_t *cmds32;
|
|
u_long *cmds;
|
|
size_t maxcmds;
|
|
int error, fd;
|
|
u_int i;
|
|
|
|
fd = uap->fd;
|
|
cmds32 = uap->cmds;
|
|
maxcmds = uap->maxcmds;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
|
|
fdp = td->td_proc->p_fd;
|
|
FILEDESC_SLOCK(fdp);
|
|
|
|
if (fget_locked(fdp, fd) == NULL) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If all ioctls are allowed (fde_nioctls == -1 && fde_ioctls == NULL)
|
|
* the only sane thing we can do is to not populate the given array and
|
|
* return CAP_IOCTLS_ALL (actually, INT_MAX).
|
|
*/
|
|
|
|
fdep = &fdp->fd_ofiles[fd];
|
|
cmds = fdep->fde_ioctls;
|
|
if (cmds32 != NULL && cmds != NULL) {
|
|
for (i = 0; i < MIN(fdep->fde_nioctls, maxcmds); i++) {
|
|
error = suword32(&cmds32[i], cmds[i]);
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
}
|
|
if (fdep->fde_nioctls == -1)
|
|
td->td_retval[0] = INT_MAX;
|
|
else
|
|
td->td_retval[0] = fdep->fde_nioctls;
|
|
|
|
error = 0;
|
|
out:
|
|
FILEDESC_SUNLOCK(fdp);
|
|
return (error);
|
|
}
|
|
|
|
#else /* !CAPABILITIES */
|
|
|
|
int
|
|
freebsd32_cap_enter(struct thread *td,
|
|
struct freebsd32_cap_enter_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
freebsd32_cap_ioctls_limit(struct thread *td,
|
|
struct freebsd32_cap_ioctls_limit_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
freebsd32_cap_ioctls_get(struct thread *td,
|
|
struct freebsd32_cap_ioctls_get_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
#endif /* CAPABILITIES */
|