Date: Tue, 27 Oct 2009 12:19:16 +0200 From: Kostik Belousov <kostikbel@gmail.com> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r198505 - head/sys/vm Message-ID: <20091027101915.GD2160@deviant.kiev.zoral.com.ua> In-Reply-To: <200910271015.n9RAFwZJ028187@svn.freebsd.org> References: <200910271015.n9RAFwZJ028187@svn.freebsd.org>
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--/4AxN65oSelVOBJV Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Oct 27, 2009 at 10:15:58AM +0000, Konstantin Belousov wrote: > Author: kib > Date: Tue Oct 27 10:15:58 2009 > New Revision: 198505 > URL: http://svn.freebsd.org/changeset/base/198505 >=20 > Log: > When protection of wired read-only mapping is changed to read-write, of private wired read-only mapping > install new shadow object behind the map entry and copy the pages > from the underlying objects to it. This makes the mprotect(2) call to > actually perform the requested operation instead of silently do nothing > and return success, that causes SIGSEGV on later write access to the > mapping. --/4AxN65oSelVOBJV Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkrmySMACgkQC3+MBN1Mb4giKQCfcPWCg+UStNc4qGocYZrFFN2W zqEAn1Lb88i/VpbKFiIQw5CqFYWcj8Ve =Z7vS -----END PGP SIGNATURE----- --/4AxN65oSelVOBJV--
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