Attachment 311797 Details for Bug 455378 – Upstream patch for this issue

[patch] Upstream patch for this issue

x86-fix-ldt-limit-for-64-bit.patch (text/plain), 1.12 KB, created by Eugene Teo (Security Response) on 2008-07-15 08:56:54 UTC

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Creator: Eugene Teo (Security Response)

Created: 2008-07-15 08:56:54 UTC

Size: 1.12 KB

patch

obsolete

>From 5ac37f87ff18843aabab84cf75b2f8504c2d81fe Mon Sep 17 00:00:00 2001
>From: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
>Date: Fri, 11 Jul 2008 18:04:46 +0200
>Subject: [PATCH] x86: fix ldt limit for 64 bit
>
>Fix size of LDT entries. On x86-64, ldt_desc is a double-sized descriptor.
>
>Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
>Signed-off-by: Ingo Molnar <mingo@elte.hu>
>---
> include/asm-x86/desc.h |    4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
>index 268a012..28bddbc 100644
>--- a/include/asm-x86/desc.h
>+++ b/include/asm-x86/desc.h
>@@ -192,8 +192,8 @@ static inline void native_set_ldt(const void *addr, unsigned int entries)
> 		unsigned cpu = smp_processor_id();
> 		ldt_desc ldt;
> 
>-		set_tssldt_descriptor(&ldt, (unsigned long)addr,
>-				      DESC_LDT, entries * sizeof(ldt) - 1);
>+		set_tssldt_descriptor(&ldt, (unsigned long)addr, DESC_LDT,
>+				      entries * LDT_ENTRY_SIZE - 1);
> 		write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT,
> 				&ldt, DESC_LDT);
> 		asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8));
>-- 
>1.5.5.1
>

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Attachments on bug 455378: 311797