Commit aad1383c authored by Dan Robertson's avatar Dan Robertson Committed by Jaegeuk Kim
Browse files

f2fs: check position in move range ioctl 



When the move range ioctl is used, check the input and output position and
ensure that it is a non-negative value. Without this check
f2fs_get_dnode_of_data may hit a memmory bug.

Signed-off-by: default avatarDan Robertson <dan@dlrobertson.com>
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 335cac8b

fs/f2fs/file.c

+3 −0
Original line number Diff line number Diff line
@@ -2768,6 +2768,9 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in, 
	if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))

		return -EOPNOTSUPP;



	if (pos_out < 0 || pos_in < 0)

		return -EINVAL;



	if (src == dst) {

		if (pos_in == pos_out)

			return 0;