linux-kernel - Re: [PATCH] fs: ocfs2: Check status values

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Date:   Tue, 10 Oct 2023 09:20:05 +0800
From:   Joseph Qi <joseph.qi@...ux.alibaba.com>
To:     Artem Chernyshev <artem.chernyshev@...-soft.ru>,
        Joel Becker <jlbec@...lplan.org>,
        Mark Fasheh <mark@...heh.com>, akpm <akpm@...ux-foundation.org>
Cc:     Kurt Hackel <kurt.hackel@...cle.com>, ocfs2-devel@...ts.linux.dev,
        linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH] fs: ocfs2: Check status values



On 10/9/23 10:11 PM, Artem Chernyshev wrote:
> Test return values before overwriting.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Signed-off-by: Artem Chernyshev <artem.chernyshev@...-soft.ru>

Looks good.
Reviewed-by: Joseph Qi <joseph.qi@...ux.alibaba.com>

> ---
>  fs/ocfs2/namei.c       | 8 ++++++++
>  fs/ocfs2/quota_local.c | 4 ++++
>  2 files changed, 12 insertions(+)
> 
> diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
> index 5cd6d7771cea..836c4279a979 100644
> --- a/fs/ocfs2/namei.c
> +++ b/fs/ocfs2/namei.c
> @@ -1597,6 +1597,10 @@ static int ocfs2_rename(struct mnt_idmap *idmap,
>  	if (update_dot_dot) {
>  		status = ocfs2_update_entry(old_inode, handle,
>  					    &old_inode_dot_dot_res, new_dir);
> +		if (status < 0) {
> +			mlog_errno(status);
> +			goto bail;
> +		}
>  		drop_nlink(old_dir);
>  		if (new_inode) {
>  			drop_nlink(new_inode);
> @@ -1636,6 +1640,10 @@ static int ocfs2_rename(struct mnt_idmap *idmap,
>  							 INODE_CACHE(old_dir),
>  							 old_dir_bh,
>  							 OCFS2_JOURNAL_ACCESS_WRITE);
> +			if (status < 0) {
> +				mlog_errno(status);
> +				goto bail;
> +			}
>  			fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
>  			ocfs2_set_links_count(fe, old_dir->i_nlink);
>  			ocfs2_journal_dirty(handle, old_dir_bh);
> diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
> index dfaae1e52412..e09842fc9d4d 100644
> --- a/fs/ocfs2/quota_local.c
> +++ b/fs/ocfs2/quota_local.c
> @@ -1240,6 +1240,10 @@ int ocfs2_create_local_dquot(struct dquot *dquot)
>  				     &od->dq_local_phys_blk,
>  				     &pcount,
>  				     NULL);
> +	if (status < 0) {
> +		mlog_errno(status);
> +		goto out;
> +	}
>  
>  	/* Initialize dquot structure on disk */
>  	status = ocfs2_local_write_dquot(dquot);