/*
* For backward compatibility.
*/
int
sys_cap_new(struct thread *td, struct cap_new_args *uap)
{
struct filedesc *fdp;
cap_rights_t rights;
register_t newfd;
int error, fd;
fd = uap->fd;
rights = uap->rights;
AUDIT_ARG_FD(fd);
AUDIT_ARG_RIGHTS(rights);
if ((rights & ~CAP_ALL) != 0)
return (EINVAL);
fdp = td->td_proc->p_fd;
FILEDESC_SLOCK(fdp);
if (fget_locked(fdp, fd) == NULL) {
FILEDESC_SUNLOCK(fdp);
return (EBADF);
}
error = _cap_check(cap_rights(fdp, fd), rights, CAPFAIL_INCREASE);
FILEDESC_SUNLOCK(fdp);
if (error != 0)
return (error);
error = do_dup(td, 0, fd, 0, &newfd);
if (error != 0)
return (error);
FILEDESC_XLOCK(fdp);
/*
* We don't really care about the race between checking capability
* rights for the source descriptor and now. If capability rights
* were ok at that earlier point, the process had this descriptor
* with those rights, so we don't increase them in security sense,
* the process might have done the cap_new(2) a bit earlier to get
* the same effect.
*/
fdp->fd_ofiles[newfd].fde_rights = rights;
if ((rights & CAP_IOCTL) == 0) {
free(fdp->fd_ofiles[newfd].fde_ioctls, M_TEMP);
fdp->fd_ofiles[newfd].fde_ioctls = NULL;
fdp->fd_ofiles[newfd].fde_nioctls = 0;
}
if ((rights & CAP_FCNTL) == 0)
fdp->fd_ofiles[newfd].fde_fcntls = 0;
FILEDESC_XUNLOCK(fdp);
td->td_retval[0] = newfd;
return (0);
}
/*
* System call to limit rights of the given capability.
*/
int
sys_cap_rights_limit(struct thread *td, struct cap_rights_limit_args *uap)
{
cap_rights_t rights;
int error, version;
cap_rights_init(&rights);
error = copyin(uap->rightsp, &rights, sizeof(rights.cr_rights[0]));
if (error != 0)
return (error);
version = CAPVER(&rights);
if (version != CAP_RIGHTS_VERSION_00)
return (EINVAL);
error = copyin(uap->rightsp, &rights,
sizeof(rights.cr_rights[0]) * CAPARSIZE(&rights));
if (error != 0)
return (error);
/* Check for race. */
if (CAPVER(&rights) != version)
return (EINVAL);
if (!cap_rights_is_valid(&rights))
return (EINVAL);
if (version != CAP_RIGHTS_VERSION) {
rights.cr_rights[0] &= ~(0x3ULL << 62);
rights.cr_rights[0] |= ((uint64_t)CAP_RIGHTS_VERSION << 62);
}
#ifdef KTRACE
if (KTRPOINT(td, KTR_STRUCT))
ktrcaprights(&rights);
#endif
AUDIT_ARG_FD(uap->fd);
AUDIT_ARG_RIGHTS(&rights);
return (kern_cap_rights_limit(td, uap->fd, &rights));
}
/*
* System call to limit rights of the given capability.
*/
int
sys_cap_rights_limit(struct thread *td, struct cap_rights_limit_args *uap)
{
struct filedesc *fdp;
cap_rights_t rights;
int error, fd;
fd = uap->fd;
rights = uap->rights;
AUDIT_ARG_FD(fd);
AUDIT_ARG_RIGHTS(rights);
if ((rights & ~CAP_ALL) != 0)
return (EINVAL);
fdp = td->td_proc->p_fd;
FILEDESC_XLOCK(fdp);
if (fget_locked(fdp, fd) == NULL) {
FILEDESC_XUNLOCK(fdp);
return (EBADF);
}
error = _cap_check(cap_rights(fdp, fd), rights, CAPFAIL_INCREASE);
if (error == 0) {
fdp->fd_ofiles[fd].fde_rights = rights;
if ((rights & CAP_IOCTL) == 0) {
free(fdp->fd_ofiles[fd].fde_ioctls, M_TEMP);
fdp->fd_ofiles[fd].fde_ioctls = NULL;
fdp->fd_ofiles[fd].fde_nioctls = 0;
}
if ((rights & CAP_FCNTL) == 0)
fdp->fd_ofiles[fd].fde_fcntls = 0;
}
FILEDESC_XUNLOCK(fdp);
return (error);
}
/*
* System call to limit rights of the given capability.
*/
int
sys_cap_rights_limit(struct thread *td, struct cap_rights_limit_args *uap)
{
struct filedesc *fdp;
cap_rights_t rights;
int error, fd, version;
cap_rights_init(&rights);
error = copyin(uap->rightsp, &rights, sizeof(rights.cr_rights[0]));
if (error != 0)
return (error);
version = CAPVER(&rights);
if (version != CAP_RIGHTS_VERSION_00)
return (EINVAL);
error = copyin(uap->rightsp, &rights,
sizeof(rights.cr_rights[0]) * CAPARSIZE(&rights));
if (error != 0)
return (error);
/* Check for race. */
if (CAPVER(&rights) != version)
return (EINVAL);
if (!cap_rights_is_valid(&rights))
return (EINVAL);
if (version != CAP_RIGHTS_VERSION) {
rights.cr_rights[0] &= ~(0x3ULL << 62);
rights.cr_rights[0] |= ((uint64_t)CAP_RIGHTS_VERSION << 62);
}
#ifdef KTRACE
if (KTRPOINT(td, KTR_STRUCT))
ktrcaprights(&rights);
#endif
fd = uap->fd;
AUDIT_ARG_FD(fd);
AUDIT_ARG_RIGHTS(&rights);
fdp = td->td_proc->p_fd;
FILEDESC_XLOCK(fdp);
if (fget_locked(fdp, fd) == NULL) {
FILEDESC_XUNLOCK(fdp);
return (EBADF);
}
error = _cap_check(cap_rights(fdp, fd), &rights, CAPFAIL_INCREASE);
if (error == 0) {
fdp->fd_ofiles[fd].fde_rights = rights;
if (!cap_rights_is_set(&rights, CAP_IOCTL)) {
free(fdp->fd_ofiles[fd].fde_ioctls, M_FILECAPS);
fdp->fd_ofiles[fd].fde_ioctls = NULL;
fdp->fd_ofiles[fd].fde_nioctls = 0;
}
if (!cap_rights_is_set(&rights, CAP_FCNTL))
fdp->fd_ofiles[fd].fde_fcntls = 0;
}
FILEDESC_XUNLOCK(fdp);
return (error);
}
