linux-kernel - [PATCH 0/2] x86_64, xen: Simplify Xen SYSCALL handling

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <cover.1437951794.git.luto@kernel.org>
Date:	Sun, 26 Jul 2015 16:29:08 -0700
From:	Andy Lutomirski <luto@...nel.org>
To:	X86 ML <x86@...nel.org>,
	"xen-devel@...ts.xen.org" <xen-devel@...ts.xen.org>,
	Andrew Cooper <andrew.cooper3@...rix.com>
Cc:	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...en8.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Andy Lutomirski <luto@...nel.org>
Subject: [PATCH 0/2] x86_64, xen: Simplify Xen SYSCALL handling

Xen's SYSCALL hooks are overcomplicated and add unnecessary places
where RSP is user controlled.  Simplify it and get rid of those user
RSP code paths under Xen.

Tested as an Intel KVM guest.  Not tested under Xen or on AMD, both
of which are important.

Andy Lutomirski (2):
  x86/entry/64: Rearrange SYSCALL entry points for Xen's benefit
  x86/xen/64: Rearrange the SYSCALL entries

 arch/x86/entry/entry_64.S        | 29 +++++++++++++++--------------
 arch/x86/entry/entry_64_compat.S | 12 +++++++-----
 arch/x86/xen/xen-asm_64.S        | 24 ++++++++++--------------
 3 files changed, 32 insertions(+), 33 deletions(-)

-- 
2.4.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/