ntfs: avoid overflow when limiting attribute read length

ntfs_inode_attr_pread() limits a read to the attribute size using
pos + count. A large count can overflow the signed sum and bypass
the attribute EOF boundary check. Compare count with isize - pos
instead, after validating pos, so the read length limit cannot wrap.

Fixes: af0db57d4293 ("ntfs: update inode operations")
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Reviewed-by: Baolin Liu <liubaolin@kylinos.cn>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

0 files changed, 0 insertions, 0 deletions