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Date: Wed, 26 Sep 2001 18:30:05 -0700 (PDT)
From: David Xu <davidx@viasoft.com.cn>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: misc/30857: intr_machdep.c allows access out of array bound
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>Number:         30857
>Category:       misc
>Synopsis:       intr_machdep.c allows access out of array bound
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Sep 26 18:40:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     David Xu
>Release:        FreeBSD 4.4-release
>Organization:
Viasoft
>Environment:
FreeBSD davidbsd.viasoft.com.cn 4.4-RELEASE FreeBSD 4.4-RELEASE #3: Thu Sep 27 0
9:04:24 CST 2001     root@davidbsd.viasoft.com.cn:/usr/src/sys/compile/xu  i386
>Description:
in source file /sys/i386/isa/intr_machdep.c, function icu_setup
does not detect array bound correctly, allow access out of bound data.
>How-To-Repeat:

>Fix:
patch is here:
--- intr_machdep.c.orig	Thu Sep 27 09:03:29 2001
+++ intr_machdep.c	Thu Sep 27 09:04:11 2001
@@ -433,6 +433,7 @@
 #else
 	if ((u_int)intr >= ICU_LEN || intr == ICU_SLAVEID)
 #endif /* APIC_IO */
+		return (EINVAL);
 	if (intr_handler[intr] != isa_strayintr)
 		return (EBUSY);
>Release-Note:
>Audit-Trail:
>Unformatted:

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