diff options
| author | Sheng Yong <shengyong1@huawei.com> | 2017-03-08 10:47:12 +0800 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2017-05-21 18:38:02 +0200 |
| commit | b888bbe3d6c1ab7a77d03fe7e899730fd31e2ecc (patch) | |
| tree | b80e1dcb2bb3b7b2851ee97cbdc74690f5a5d5dc /fs/f2fs/file.c | |
| parent | 9730aaade1cde50c4ce18d0a3483bb257ff43c40 (diff) | |
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>
Diffstat (limited to 'fs/f2fs/file.c')
| -rw-r--r-- | fs/f2fs/file.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index d7214fbfc..c5dbe9ff8 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2086,6 +2086,12 @@ 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) |