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Introduce support for Mandatory Access Control and extensible

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kernel access control.

Invoke the necessary MAC entry points to maintain labels on
process credentials.  In particular, invoke entry points for
the initialization and destruction of struct ucred, the copying
of struct ucred, and permit the initial labels to be set for
both process 0 (parent of all kernel processes) and process 1
(parent of all user processes).

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
This commit is contained in:
Robert Watson 2002-07-31 00:39:19 +00:00
parent 47ac133d33
commit 4024496496
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=101001
2 changed files with 19 additions and 0 deletions
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8
sys/kern/init_main.c
View File

@ -43,6 +43,7 @@
*/
#include "opt_init_path.h"
#include "opt_mac.h"
#include <sys/param.h>
#include <sys/kernel.h>
@ -50,6 +51,7 @@
#include <sys/filedesc.h>
#include <sys/ktr.h>
#include <sys/lock.h>
#include <sys/mac.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
@ -362,6 +364,9 @@ KASSERT((ke->ke_kgrlist.tqe_next != ke), ("linked to self!"));
p->p_ucred->cr_uidinfo = uifind(0);
p->p_ucred->cr_ruidinfo = uifind(0);
p->p_ucred->cr_prison = NULL; /* Don't jail it. */
#ifdef MAC
mac_create_proc0(p->p_ucred);
#endif
td->td_ucred = crhold(p->p_ucred);
/* Create procsig. */
@ -657,6 +662,9 @@ create_init(const void *udata __unused)
initproc->p_flag |= P_SYSTEM;
oldcred = initproc->p_ucred;
crcopy(newcred, oldcred);
#ifdef MAC
mac_create_proc1(newcred);
#endif
initproc->p_ucred = newcred;
PROC_UNLOCK(initproc);
crfree(oldcred);

11
sys/kern/kern_prot.c
View File

@ -45,6 +45,7 @@
*/
#include "opt_compat.h"
#include "opt_mac.h"
#include <sys/param.h>
#include <sys/systm.h>
@ -52,6 +53,7 @@
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mac.h>
#include <sys/mutex.h>
#include <sys/sx.h>
#include <sys/proc.h>
@ -1670,6 +1672,9 @@ crget(void)
MALLOC(cr, struct ucred *, sizeof(*cr), M_CRED, M_WAITOK | M_ZERO);
cr->cr_ref = 1;
cr->cr_mtxp = mtx_pool_find(cr);
#ifdef MAC
mac_init_cred(cr);
#endif
return (cr);
}
@ -1714,6 +1719,9 @@ crfree(struct ucred *cr)
*/
if (jailed(cr))
prison_free(cr->cr_prison);
#ifdef MAC
mac_destroy_cred(cr);
#endif
FREE(cr, M_CRED);
mtx_unlock(&Giant);
} else {
@ -1750,6 +1758,9 @@ crcopy(struct ucred *dest, struct ucred *src)
uihold(dest->cr_ruidinfo);
if (jailed(dest))
prison_hold(dest->cr_prison);
#ifdef MAC
mac_create_cred(src, dest);
#endif
}
/*