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| author | Sheng Yong <shengyong1@huawei.com> | 2017-03-08 05:47:12 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-03-22 05:34:25 +0300 |
| commit | 1941d7bcb474aa38caca16e6d3416e623d37d800 (patch) | |
| tree | e1e116b804e38e9be09c328f61696ec27e247a3b | |
| parent | b0beab5016d04009a7c1d4639ccb5b3d46dad56f (diff) | |
| download | linux-1941d7bcb474aa38caca16e6d3416e623d37d800.tar.xz | |
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>
| -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 427ab1b41de3..300d62015c24 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -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) |