| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/uaccess.h> |
| |
| /* out-of-line parts */ |
| |
| #ifndef INLINE_COPY_FROM_USER |
| unsigned long _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))) { |
| kasan_check_write(to, n); |
| res = raw_copy_from_user(to, from, n); |
| } |
| if (unlikely(res)) |
| memset(to + (n - res), 0, res); |
| return res; |
| } |
| EXPORT_SYMBOL(_copy_from_user); |
| #endif |
| |
| #ifndef INLINE_COPY_TO_USER |
| unsigned long _copy_to_user(void __user *to, const void *from, unsigned long n) |
| { |
| might_fault(); |
| if (likely(access_ok(VERIFY_WRITE, to, n))) { |
| kasan_check_read(from, n); |
| n = raw_copy_to_user(to, from, n); |
| } |
| return n; |
| } |
| EXPORT_SYMBOL(_copy_to_user); |
| #endif |