diff options
| -rw-r--r-- | arch/x86/include/asm/page_64_types.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/pgtable_64.h | 5 | ||||
| -rw-r--r-- | arch/x86/include/asm/uaccess.h | 7 | ||||
| -rw-r--r-- | arch/x86/lib/usercopy_64.c | 2 |
4 files changed, 4 insertions, 12 deletions
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h index 8d382d3abf3..7639dbf5d22 100644 --- a/arch/x86/include/asm/page_64_types.h +++ b/arch/x86/include/asm/page_64_types.h @@ -41,7 +41,7 @@ /* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */ #define __PHYSICAL_MASK_SHIFT 46 -#define __VIRTUAL_MASK_SHIFT 48 +#define __VIRTUAL_MASK_SHIFT 47 /* * Kernel image size is limited to 512 MB (see level2_kernel_pgt in diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index abde308fdb0..c57a3011714 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -165,10 +165,7 @@ extern void cleanup_highmap(void); /* fs/proc/kcore.c */ #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) -#define kc_offset_to_vaddr(o) \ - (((o) & (1UL << (__VIRTUAL_MASK_SHIFT - 1))) \ - ? ((o) | ~__VIRTUAL_MASK) \ - : (o)) +#define kc_offset_to_vaddr(o) ((o) | ~__VIRTUAL_MASK) #define __HAVE_ARCH_PTE_SAME #endif /* !__ASSEMBLY__ */ diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h index 512ee87062c..20e6a795e16 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -25,12 +25,7 @@ #define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) #define KERNEL_DS MAKE_MM_SEG(-1UL) - -#ifdef CONFIG_X86_32 -# define USER_DS MAKE_MM_SEG(PAGE_OFFSET) -#else -# define USER_DS MAKE_MM_SEG(__VIRTUAL_MASK) -#endif +#define USER_DS MAKE_MM_SEG(TASK_SIZE_MAX) #define get_ds() (KERNEL_DS) #define get_fs() (current_thread_info()->addr_limit) diff --git a/arch/x86/lib/usercopy_64.c b/arch/x86/lib/usercopy_64.c index ec13cb5f17e..b7c2849ffb6 100644 --- a/arch/x86/lib/usercopy_64.c +++ b/arch/x86/lib/usercopy_64.c @@ -127,7 +127,7 @@ EXPORT_SYMBOL(__strnlen_user); long strnlen_user(const char __user *s, long n) { - if (!access_ok(VERIFY_READ, s, n)) + if (!access_ok(VERIFY_READ, s, 1)) return 0; return __strnlen_user(s, n); } |