Commit 1941d7bc authored Mar 08, 2017 by Sheng Yong Committed by Jaegeuk Kim Mar 21, 2017

f2fs: check range before defragment



This patch checks the parameter range passed by ioctl to void that range
exceeds the max_file_blocks limit.

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent b0beab50

fs/f2fs/file.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -2054,6 +2054,12 @@ static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
		goto out;
		}

		if (unlikely((range.start + range.len) >> PAGE_SHIFT >
		sbi->max_file_blocks)) {
		err = -EINVAL;
		goto out;
		}

		err = f2fs_defragment_range(sbi, filp, &range);
		f2fs_update_time(sbi, REQ_TIME);
		if (err < 0)