From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: "Andrew Cooper" <andrew.cooper3@citrix.com>,
"Jan Beulich" <JBeulich@suse.com>,
"Roger Pau Monné" <roger.pau@citrix.com>, "Wei Liu" <wl@xen.org>,
"Andy Lutomirski" <luto@kernel.org>,
"Manuel Bouyer" <bouyer@antioche.eu.org>
Subject: [PATCH 0/3] x86/pv: Multiple fixes to SYSCALL/SYSENTER handling (XSA-339 followup)
Date: Wed, 23 Sep 2020 11:18:45 +0100 [thread overview]
Message-ID: <20200923101848.29049-1-andrew.cooper3@citrix.com> (raw)
Patches 1 and 2 are a consequence of trying to get the Linux x86 selftests to
pass even when running under Xen.
Patches 3 and XSA-339 were further fallout from trying to put in place testing
to cover all aspects of the PV fast system call entrypoints.
Patch 3 was almost an XSA itself, but was ultimately argued as not affecting
any known PV guest. It turns out that this is only true because of c/s
dba899de14 in 2018, which did fix a real userspace => VM DoS on NetBSD.
All fixes need backporting.
Andrew Cooper (3):
x86/pv: Don't deliver #GP for a SYSENTER with NT set
x86/pv: Don't clobber NT on return-to-guest
x86/pv: Inject #UD for missing SYSCALL callbacks
xen/arch/x86/x86_64/compat/entry.S | 2 +-
xen/arch/x86/x86_64/entry.S | 31 +++++++++++++++++++++----------
2 files changed, 22 insertions(+), 11 deletions(-)
--
2.11.0
next reply other threads:[~2020-09-23 10:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-23 10:18 Andrew Cooper [this message]
2020-09-23 10:18 ` [PATCH 1/3] x86/pv: Don't deliver #GP for a SYSENTER with NT set Andrew Cooper
2020-09-24 13:55 ` Jan Beulich
2020-09-23 10:18 ` [PATCH 2/3] x86/pv: Don't clobber NT on return-to-guest Andrew Cooper
2020-09-24 13:57 ` Jan Beulich
2020-09-23 10:18 ` [PATCH 3/3] x86/pv: Inject #UD for missing SYSCALL callbacks Andrew Cooper
2020-09-24 14:56 ` Jan Beulich
2020-09-28 13:05 ` Andrew Cooper
2020-09-28 15:35 ` Jan Beulich
2020-10-09 11:53 ` [PATCH v2] " Andrew Cooper
2020-10-09 12:40 ` Manuel Bouyer
2020-10-09 12:50 ` Andrew Cooper
2020-10-14 14:16 ` Roger Pau Monné
2020-10-14 14:20 ` Manuel Bouyer
2020-10-14 14:26 ` Andrew Cooper
2020-10-14 15:17 ` Andrew Cooper
2020-10-14 16:28 ` Roger Pau Monné
2020-10-14 17:41 ` Andrew Cooper
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