Commit 1941d7bc authored by Sheng Yong's avatar Sheng Yong Committed by Jaegeuk Kim

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: default avatarSheng Yong <shengyong1@huawei.com>
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent b0beab50
...@@ -2054,6 +2054,12 @@ static int f2fs_ioc_defragment(struct file *filp, unsigned long arg) ...@@ -2054,6 +2054,12 @@ static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
goto out; 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); err = f2fs_defragment_range(sbi, filp, &range);
f2fs_update_time(sbi, REQ_TIME); f2fs_update_time(sbi, REQ_TIME);
if (err < 0) if (err < 0)
......
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