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Allow MAC policies to block/revoke kern_alq write access to a file.

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Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
Reviewed by:	jeff
This commit is contained in:
Robert Watson 2003-10-25 16:10:41 +00:00
parent da77b2fa6b
commit 67536f038c
1 changed files with 10 additions and 2 deletions
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12
sys/kern/kern_alq.c
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@ -27,11 +27,14 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_mac.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/lock.h>
#include <sys/mac.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/proc.h>
@ -291,8 +294,13 @@ alq_doio(struct alq *alq)
vn_start_write(vp, &mp, V_WAIT);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
VOP_LEASE(vp, td, alq->aq_cred, LEASE_WRITE);
/* XXX error ignored */
VOP_WRITE(vp, &auio, IO_UNIT | IO_APPEND, alq->aq_cred);
/*
* XXX: VOP_WRITE error checks are ignored.
*/
#ifdef MAC
if (mac_check_vnode_write(alq->aq_cred, NOCRED, vp) == 0)
#endif
VOP_WRITE(vp, &auio, IO_UNIT | IO_APPEND, alq->aq_cred);
VOP_UNLOCK(vp, 0, td);
vn_finished_write(mp);