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xen-devel
[Xen-devel] [PATCH v2 1/6] x86-64: Pad vDSO to a page boundary
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To: |
x86@xxxxxxxxxx, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> |
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Subject: |
[Xen-devel] [PATCH v2 1/6] x86-64: Pad vDSO to a page boundary |
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From: |
Andy Lutomirski <luto@xxxxxxx> |
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Date: |
Wed, 3 Aug 2011 09:31:49 -0400 |
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Cc: |
jeremy@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, keir.xen@xxxxxxxxx, Andy Lutomirski <luto@xxxxxxx> |
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Wed, 03 Aug 2011 06:35:04 -0700 |
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This avoids an information leak to userspace.
Signed-off-by: Andy Lutomirski <luto@xxxxxxx>
---
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
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