PR/56328 CVS commit: src/sys/arch/xen/xen

["Jaromir Dolecek" <jdolecek%netbsd.org@localhost>]

The following reply was made to PR port-xen/56328; it has been noted by GNATS.

From: "Jaromir Dolecek" <jdolecek%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/56328 CVS commit: src/sys/arch/xen/xen
Date: Wed, 28 Jul 2021 21:38:50 +0000

 Module Name:	src
 Committed By:	jdolecek
 Date:		Wed Jul 28 21:38:50 UTC 2021
 
 Modified Files:
 	src/sys/arch/xen/xen: xbdback_xenbus.c
 
 Log Message:
 fix intentional, but eventually faulty off-by-one for the maximum number
 of segments for I/O - this was supposed to allow MAXPHYS-size I/O even
 with page offset, but actually ended up letting through I/O up to
 MAXPHYS+PAGE_SIZE
 
 the KASSERT(bcount < MAXPHYS) is kept as-is, since at that place the number
 of segments should already be validated, so it's kernel bug if the size
 is still too big there
 
 fixes PR port-xen/56328 by Greg Oster
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.97 -r1.98 src/sys/arch/xen/xen/xbdback_xenbus.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.