Date: Fri, 23 Apr 2004 22:52:18 -0500 From: Alan Cox <alc@cs.rice.edu> To: Alan Cox <alc@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/vm vm_map.c vm_map.h Message-ID: <20040424035218.GI5199@cs.rice.edu> In-Reply-To: <200404240346.i3O3kipl055272@repoman.freebsd.org> References: <200404240346.i3O3kipl055272@repoman.freebsd.org>
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On Fri, Apr 23, 2004 at 08:46:44PM -0700, Alan Cox wrote: > alc 2004/04/23 20:46:44 PDT > > FreeBSD src repository > > Modified files: > sys/vm vm_map.c vm_map.h > Log: > In cases where a file was resident in memory mmap(..., PROT_NONE, ...) > would actually map the file with read access enabled. According to > http://www.opengroup.org/onlinepubs/007904975/functions/mmap.html this is > an error. Similarly, an madvise(..., MADV_WILLNEED) would enable read > access on a virtual address range that was PROT_NONE. > > The solution implemented herein is (1) to pass a vm_prot_t to > vm_map_pmap_enter() describing the allowed access and (2) to make > vm_map_pmap_enter() responsible for understanding the limitations of > pmap_enter_quick(). > > Submitted by: "Mark W. Krentel" <krentel@dreamscape.com> > PR: kern/64573 > > Revision Changes Path > 1.333 +5 -4 src/sys/vm/vm_map.c > 1.109 +1 -1 src/sys/vm/vm_map.h Could someone else please port and commit this change to RELENG_4? I'm happy to explain what to do. Thanks, Alan
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