p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

blackfin: fix copy_from_user() 

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-09-09 19:16:58 -04:00
parent 917400cecb
commit 8f035983dd
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/blackfin/include/asm/uaccess.h
View File

@ -171,11 +171,12 @@ static inline int bad_user_access_length(void)
static inline unsigned long __must_check
copy_from_user(void *to, const void __user *from, unsigned long n)
{
if (access_ok(VERIFY_READ, from, n))
if (likely(access_ok(VERIFY_READ, from, n))) {
memcpy(to, (const void __force *)from, n);
else
return n;
return 0;
return 0;
}
memset(to, 0, n);
return n;
}
static inline unsigned long __must_check