Date: Fri, 19 May 2006 12:34:06 +0300 From: Rostislav Krasny <rosti.bsd@gmail.com> To: David Xu <davidxu@freebsd.org> Cc: is@rambler-co.ru, cperciva@freebsd.org, freebsd-current@freebsd.org Subject: Re: FreeBSD-SA-06:14.fpu Message-ID: <20060519123406.3cdf83e1.rosti.bsd@gmail.com> In-Reply-To: <200605191705.07309.davidxu@freebsd.org> References: <20060430142408.fcd60069.rosti.bsd@gmail.com> <200605190802.08825.davidxu@freebsd.org> <20060519041052.ab8dbbe9.rosti.bsd@gmail.com> <200605191705.07309.davidxu@freebsd.org>
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On Fri, 19 May 2006 17:05:07 +0800 David Xu <davidxu@freebsd.org> wrote: > On Friday 19 May 2006 09:10, Rostislav Krasny wrote: > > > Ok. What should I do before adding the above #ifdef's? Is it enough to > > change following files only? > > > > src/sys/conf/options > I think they are sys/conf/options.i386 and sys/conf/options.amd64 Ok, then should I also change sys/conf/options.pc98 ? I don't know much about the PC98. What processors there are in use? > > src/sys/i386/conf/GENERIC > > src/sys/i386/conf/NOTES > > src/sys/i386/conf/PAE > > src/sys/i386/conf/SMP > > src/sys/amd64/conf/GENERIC > > src/sys/amd64/conf/NOTES > > src/sys/amd64/conf/SMP > > > I think modifying GENERIC and NOTES is enough. Then PAE and SMP kernels will be vulnerable on AMD by default? > > > but I would call it BUG_FXSAVE like Linux's select() > > > changed timeout value which only added incompatibility rather than > > > advantage. > > > > I don't know about Linux's select() but according to what I've seen on > > their "7466f9e72dac13452d871a3fb72fc7bd9c93c864" commit they use > > X86_FEATURE_FXSAVE_LEAK. What do you think about FXSAVE_LEAK instead of > > BUG_FXSAVE? > > I have no objection. Ok, I'll use FXSAVE_LEAK.
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