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>
index | next in thread | previous in thread | raw e-mail
[-- Attachment #1 --] 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 > > 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. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkrmySMACgkQC3+MBN1Mb4giKQCfcPWCg+UStNc4qGocYZrFFN2W zqEAn1Lb88i/VpbKFiIQw5CqFYWcj8Ve =Z7vS -----END PGP SIGNATURE-----help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20091027101915.GD2160>