Thread (1 message) 1 message, 1 author, 2011-08-03
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[PATCH v2 1/6] x86-64: Pad vDSO to a page boundary

From: Andy Lutomirski <hidden>
Date: 2011-08-03 13:31:49
Subsystem: the rest, x86 architecture (32-bit and 64-bit) · Maintainers: Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen

Possibly related (same subject, not in this thread)

This avoids an information leak to userspace.

Signed-off-by: Andy Lutomirski <redacted>
---
 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. */
 
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-- 
1.7.6
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