On 6/17/25 11:57, wangzijie wrote:
> To prevent non-section-aligned size pinned file generated from truncation,
> add check condition in setattr.
>
> Signed-off-by: wangzijie <wangzij...@honor.com>
> ---
> fs/f2fs/file.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 6bd3de64f..72f7d1b4a 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -1026,6 +1026,7 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry
> *dentry,
> {
> struct inode *inode = d_inode(dentry);
> struct f2fs_inode_info *fi = F2FS_I(inode);
> + struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
> int err;
>
> if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
> @@ -1047,6 +1048,11 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct
> dentry *dentry,
> !IS_ALIGNED(attr->ia_size,
> F2FS_BLK_TO_BYTES(fi->i_cluster_size)))
> return -EINVAL;
> + if (f2fs_is_pinned_file(inode) &&
> + attr->ia_size < i_size_read(inode) &&
Do we need to consider attr->ia_size > i_size case?
Thanks,
> + !IS_ALIGNED(attr->ia_size,
> + F2FS_BLK_TO_BYTES(CAP_BLKS_PER_SEC(sbi))))
> + return -EINVAL;
> }
>
> err = setattr_prepare(idmap, dentry, attr);
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