fsck.f2fs: fix potential overflow of copying i_name

If i_namelen is corrupted, there may be an overflow when doing memcpy.

Signed-off-by: Sheng Yong <shengyong@oppo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
1 file changed