From 6ff36eba0bc2beb3cc8ebc95655a2a01dbdd575c Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Wed, 3 Sep 2008 20:25:24 -0400 Subject: [PATCH] x86-64: fix overlap of modules and fixmap areas commit 66d4bdf22b8652cda215e2653c8bbec7a767ed57 upstream Plus add a build time check so this doesn't go unnoticed again. Signed-off-by: Jan Beulich Signed-off-by: Ingo Molnar Cc: Chuck Ebbert Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/head64.c | 1 + include/asm-x86/pgtable_64.h | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index e25c57b8aa8..d946c37acec 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -135,6 +135,7 @@ void __init x86_64_start_kernel(char * real_mode_data) BUILD_BUG_ON(!(MODULES_VADDR > __START_KERNEL)); BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) == (__START_KERNEL & PGDIR_MASK))); + BUILD_BUG_ON(__fix_to_virt(__end_of_fixed_addresses) <= MODULES_END); /* clear bss before set_intr_gate with early_idt_handler */ clear_bss(); diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h index 1cc50d22d73..3922ecad4d8 100644 --- a/include/asm-x86/pgtable_64.h +++ b/include/asm-x86/pgtable_64.h @@ -146,7 +146,7 @@ static inline void native_pgd_clear(pgd_t *pgd) #define VMALLOC_END _AC(0xffffe1ffffffffff, UL) #define VMEMMAP_START _AC(0xffffe20000000000, UL) #define MODULES_VADDR _AC(0xffffffffa0000000, UL) -#define MODULES_END _AC(0xfffffffffff00000, UL) +#define MODULES_END _AC(0xffffffffff000000, UL) #define MODULES_LEN (MODULES_END - MODULES_VADDR) #ifndef __ASSEMBLY__ -- 2.11.4.GIT