[Xen-devel] [PATCH v2 1/6] x86-64: Pad vDSO to a page boundary

[Andy Lutomirski <luto@xxxxxxx>]

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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