From: Andy Lutomirski <luto@MIT.EDU>
To: x86@kernel.org, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
jeremy@goop.org, keir.xen@gmail.com,
xen-devel@lists.xensource.com,
virtualization@lists.linux-foundation.org,
Andy Lutomirski <luto@MIT.EDU>
Subject: [PATCH v2 1/6] x86-64: Pad vDSO to a page boundary
Date: Wed, 3 Aug 2011 09:31:49 -0400 [thread overview]
Message-ID: <a63380a3c58a0506a2f5a18ba1b12dbde1f25e58.1312378163.git.luto@mit.edu> (raw)
In-Reply-To: <cover.1312378163.git.luto@mit.edu>
In-Reply-To: <cover.1312378163.git.luto@mit.edu>
This avoids an information leak to userspace.
Signed-off-by: Andy Lutomirski <luto@mit.edu>
---
arch/x86/vdso/vdso.S | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/x86/vdso/vdso.S b/arch/x86/vdso/vdso.S
index 1b979c1..01f5e3b 100644
--- a/arch/x86/vdso/vdso.S
+++ b/arch/x86/vdso/vdso.S
@@ -9,6 +9,7 @@ __PAGE_ALIGNED_DATA
vdso_start:
.incbin "arch/x86/vdso/vdso.so"
vdso_end:
+ .align PAGE_SIZE /* extra data here leaks to userspace. */
.previous
--
1.7.6
next prev parent reply other threads:[~2011-08-03 13:32 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-03 13:31 [PATCH v2 0/6] Collected vdso/vsyscall fixes for 3.1 Andy Lutomirski
2011-08-03 13:31 ` Andy Lutomirski [this message]
2011-08-05 5:37 ` [tip:x86/vdso] x86-64: Pad vDSO to a page boundary tip-bot for Andy Lutomirski
2011-08-03 13:31 ` [PATCH v2 2/6] x86-64: Move the "user" vsyscall segment out of the data segment Andy Lutomirski
2011-08-05 5:37 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-08-03 13:31 ` [PATCH v2 3/6] x86-64: Work around gold bug 13023 Andy Lutomirski
2011-08-05 5:38 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-08-03 13:31 ` [PATCH v2 4/6] x86-64/xen: Enable the vvar mapping Andy Lutomirski
2011-08-03 13:49 ` Konrad Rzeszutek Wilk
2011-08-05 5:38 ` [tip:x86/vdso] x86-64, xen: " tip-bot for Andy Lutomirski
2011-08-03 13:31 ` [PATCH v2 5/6] x86-64: Add user_64bit_mode paravirt op Andy Lutomirski
2011-08-05 5:39 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-08-03 13:31 ` [PATCH v2 6/6] x86-64: Add vsyscall:emulate_vsyscall trace event Andy Lutomirski
2011-08-05 5:39 ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-08-03 13:53 ` [PATCH v2 0/6] Collected vdso/vsyscall fixes for 3.1 Konrad Rzeszutek Wilk
2011-08-03 13:56 ` Konrad Rzeszutek Wilk
2011-08-03 13:59 ` Andrew Lutomirski
2011-08-11 20:28 ` Jeremy Fitzhardinge
2011-08-11 20:47 ` Andrew Lutomirski
2011-08-03 17:34 ` [Xen-devel] " Sander Eikelenboom
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