diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/alpha/include/asm/uaccess.h | 8 | ||||
| -rw-r--r-- | arch/sh/include/asm/uaccess.h | 7 |
2 files changed, 10 insertions, 5 deletions
diff --git a/arch/alpha/include/asm/uaccess.h b/arch/alpha/include/asm/uaccess.h index e69c4e13c328..cf4ac791a592 100644 --- a/arch/alpha/include/asm/uaccess.h +++ b/arch/alpha/include/asm/uaccess.h @@ -30,11 +30,13 @@ * Address valid if: * - "addr" doesn't have any high-bits set * - AND "size" doesn't have any high-bits set - * - AND "addr+size" doesn't have any high-bits set + * - AND "addr+size-(size != 0)" doesn't have any high-bits set * - OR we are in kernel mode. */ -#define __access_ok(addr, size) \ - ((get_fs().seg & (addr | size | (addr+size))) == 0) +#define __access_ok(addr, size) ({ \ + unsigned long __ao_a = (addr), __ao_b = (size); \ + unsigned long __ao_end = __ao_a + __ao_b - !!__ao_b; \ + (get_fs().seg & (__ao_a | __ao_b | __ao_end)) == 0; }) #define access_ok(addr, size) \ ({ \ diff --git a/arch/sh/include/asm/uaccess.h b/arch/sh/include/asm/uaccess.h index deebbfab5342..5fe751ad7582 100644 --- a/arch/sh/include/asm/uaccess.h +++ b/arch/sh/include/asm/uaccess.h @@ -16,8 +16,11 @@ * sum := addr + size; carry? --> flag = true; * if (sum >= addr_limit) flag = true; */ -#define __access_ok(addr, size) \ - (__addr_ok((addr) + (size))) +#define __access_ok(addr, size) ({ \ + unsigned long __ao_a = (addr), __ao_b = (size); \ + unsigned long __ao_end = __ao_a + __ao_b - !!__ao_b; \ + __ao_end >= __ao_a && __addr_ok(__ao_end); }) + #define access_ok(addr, size) \ (__chk_user_ptr(addr), \ __access_ok((unsigned long __force)(addr), (size))) |