diff options
Diffstat (limited to 'include/linux/uaccess.h')
| -rw-r--r-- | include/linux/uaccess.h | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index efe79c1cdd47..37b226e8df13 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -6,9 +6,6 @@ #include <linux/thread_info.h> #include <linux/kasan-checks.h> -#define VERIFY_READ 0 -#define VERIFY_WRITE 1 - #define uaccess_kernel() segment_eq(get_fs(), KERNEL_DS) #include <asm/uaccess.h> @@ -111,7 +108,7 @@ _copy_from_user(void *to, const void __user *from, unsigned long n) { unsigned long res = n; might_fault(); - if (likely(access_ok(VERIFY_READ, from, n))) { + if (likely(access_ok(from, n))) { kasan_check_write(to, n); res = raw_copy_from_user(to, from, n); } @@ -129,7 +126,7 @@ static inline unsigned long _copy_to_user(void __user *to, const void *from, unsigned long n) { might_fault(); - if (access_ok(VERIFY_WRITE, to, n)) { + if (access_ok(to, n)) { kasan_check_read(from, n); n = raw_copy_to_user(to, from, n); } @@ -160,7 +157,7 @@ static __always_inline unsigned long __must_check copy_in_user(void __user *to, const void __user *from, unsigned long n) { might_fault(); - if (access_ok(VERIFY_WRITE, to, n) && access_ok(VERIFY_READ, from, n)) + if (access_ok(to, n) && access_ok(from, n)) n = raw_copy_in_user(to, from, n); return n; } @@ -267,7 +264,7 @@ extern long strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count); probe_kernel_read(&retval, addr, sizeof(retval)) #ifndef user_access_begin -#define user_access_begin() do { } while (0) +#define user_access_begin(ptr,len) access_ok(ptr, len) #define user_access_end() do { } while (0) #define unsafe_get_user(x, ptr, err) do { if (unlikely(__get_user(x, ptr))) goto err; } while (0) #define unsafe_put_user(x, ptr, err) do { if (unlikely(__put_user(x, ptr))) goto err; } while (0) |