Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#include <linux/uaccess.h>
2
3/* out-of-line parts */
4
5#ifndef INLINE_COPY_FROM_USER
6unsigned long _copy_from_user(void *to, const void __user *from, unsigned long n)
7{
8 unsigned long res = n;
9 might_fault();
10 if (likely(access_ok(VERIFY_READ, from, n))) {
11 kasan_check_write(to, n);
12 res = raw_copy_from_user(to, from, n);
13 }
14 if (unlikely(res))
15 memset(to + (n - res), 0, res);
16 return res;
17}
18EXPORT_SYMBOL(_copy_from_user);
19#endif
20
21#ifndef INLINE_COPY_TO_USER
22unsigned long _copy_to_user(void *to, const void __user *from, unsigned long n)
23{
24 might_fault();
25 if (likely(access_ok(VERIFY_WRITE, to, n))) {
26 kasan_check_read(from, n);
27 n = raw_copy_to_user(to, from, n);
28 }
29 return n;
30}
31EXPORT_SYMBOL(_copy_to_user);
32#endif