[141/145] KVM: x86 emulator: Check CPL level during privilege instruction emulation
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From: Stefan Bader on 14 Mar 2010 14:30 Greg KH wrote: > On Sat, Mar 13, 2010 at 08:37:57PM +0000, Ben Hutchings wrote: >> On Fri, 2010-03-12 at 16:27 -0800, Greg KH wrote: >>> 2.6.32-stable review patch. If anyone has any objections, please let me know. >>> >>> ---------------- >>> From: Gleb Natapov <gleb(a)redhat.com> >>> >>> commit e92805ac1228626c59c865f2f4e9059b9fb8c97b upstream. >>> >>> Add CPL checking in case emulator is tricked into emulating >>> privilege instruction from userspace. >> There were more security fixes released along with this, which surely >> belong in a stable update: >> >> 1871c6020d7308afb99127bba51f04548e7ca84e KVM: x86 emulator: fix memory access during x86 emulation This one caused a regression for AMD cpus. There is a patch for it in the process but not upstream, yet. >> f850e2e603bf5a05b0aee7901857cf85715aa694 KVM: x86 emulator: Check IOPL level during io instruction emulation >> d4c6a1549c056f1d817e8f6f2f97d8b44933472f KVM: x86 emulator: Fix popf emulation > > Yes, there were a number of kvm patches that I could not apply either > because they did not apply, or because they caused build errors. These > are some of them. I have asked the KVM developers to properly backport > them as I know nothing about KVM. Hopefully that will be done for the > next round of stable releases. I have done some backport work for 2.6.32 at least. This can be found at git://kernel.ubuntu.com/smb/linux-2.6.32.y kvm I have successfully booted a guest after the changes but it would surely help if the KVM developers could give some review on the set. Stefan > thanks, > > greg k-h > > _______________________________________________ > Stable-review mailing list > Stable-review(a)linux.kernel.org > http://linux.kernel.org/mailman/listinfo/stable-review -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |