The copy_to_user() function returns the number of bytes remaining to be
copied, but we want to return -EFAULT if the copy doesn't complete.
Signed-off-by: Wang Qing <wangq...@vivo.com>
---
fs/select.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/select.c b/fs/select.c
index 37aaa83..93cd35b
--- a/fs/select.c
+++ b/fs/select.c
@@ -400,7 +400,7 @@ static inline unsigned long __must_check
set_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset)
{
if (ufdset)
- return __copy_to_user(ufdset, fdset, FDS_BYTES(nr));
+ return __copy_to_user(ufdset, fdset, FDS_BYTES(nr)) ? -EFAULT :
0;
return 0;
}
--
2.7.4
