lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 12 Oct 2020 17:08:30 +0300 From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com> To: Arvind Sankar <nivedita@...m.mit.edu> Cc: x86@...nel.org, Joerg Roedel <jroedel@...e.de>, Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] x86/boot/64: Initialize 5-level paging variables earlier On Sat, Oct 10, 2020 at 03:26:24PM -0400, Arvind Sankar wrote: > On Sat, Oct 10, 2020 at 03:11:10PM -0400, Arvind Sankar wrote: > > Commit > > ca0e22d4f011 ("x86/boot/compressed/64: Always switch to own page table") > > started using a new set of pagetables even without KASLR. > > > > After that commit, initialize_identity_maps() is called before the > > 5-level paging variables are setup in choose_random_location(), which > > will not work if 5-level paging is actually enabled. > > Note that I don't have hardware that supports 5-level paging, so this > is not actually tested with 5-level, but based on code inspection, it > shouldn't work. qemu supports it. -cpu "qemu64,+la57" -- Kirill A. Shutemov
Powered by blists - more mailing lists