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From: Joseph Qi <joseph.qi@linux.alibaba.com>
To: Chenyuan Mi <cymi20@fudan.edu.cn>, akpm <akpm@linux-foundation.org>
Cc: yuanxzhang@fudan.edu.cn, Xiyu Yang <xiyuyang19@fudan.edu.cn>,
	Xin Tan <tanxin.ctf@gmail.com>, Mark Fasheh <mark@fasheh.com>,
	Joel Becker <jlbec@evilplan.org>,
	ocfs2-devel@oss.oracle.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] ocfs2: Fix handle refcount leak in two exception handling paths
Date: Wed, 8 Sep 2021 18:51:32 +0800	[thread overview]
Message-ID: <06d9e055-29b9-731c-5a36-d888f2c83188@linux.alibaba.com> (raw)
In-Reply-To: <20210908102055.10168-1-cymi20@fudan.edu.cn>



On 9/8/21 6:20 PM, Chenyuan Mi wrote:
> The reference counting issue happens in two exception handling paths
> of ocfs2_replay_truncate_records(). When executing these two exception
> handling paths, the function forgets to decrease the refcount of handle
> increased by ocfs2_start_trans(), causing a refcount leak.
> 
> Fix this issue by using ocfs2_commit_trans() to decrease the refcount
> of handle in two handling paths.
> 
> Signed-off-by: Chenyuan Mi <cymi20@fudan.edu.cn>
> Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
> Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>

Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
> ---
>  fs/ocfs2/alloc.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
> index f1cc8258d34a..b05fde7edc3a 100644
> --- a/fs/ocfs2/alloc.c
> +++ b/fs/ocfs2/alloc.c
> @@ -5940,6 +5940,7 @@ static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
>  		status = ocfs2_journal_access_di(handle, INODE_CACHE(tl_inode), tl_bh,
>  						 OCFS2_JOURNAL_ACCESS_WRITE);
>  		if (status < 0) {
> +			ocfs2_commit_trans(osb, handle);
>  			mlog_errno(status);
>  			goto bail;
>  		}
> @@ -5964,6 +5965,7 @@ static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
>  						     data_alloc_bh, start_blk,
>  						     num_clusters);
>  			if (status < 0) {
> +				ocfs2_commit_trans(osb, handle);
>  				mlog_errno(status);
>  				goto bail;
>  			}
> 

  reply	other threads:[~2021-09-08 10:51 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-08 10:20 Chenyuan Mi
2021-09-08 10:51 ` Joseph Qi [this message]
2021-09-08 17:12   ` [Ocfs2-devel] " Wengang Wang
2021-09-09 11:07     ` Joseph Qi
     [not found]       ` <CED0D2AD-7905-490E-8D36-50D192CD9BF1@oracle.com>
2021-09-10  1:53         ` Joseph Qi
2021-09-10 17:00           ` Wengang Wang
2021-09-14  2:12             ` Joseph Qi
2021-09-14  3:07               ` Wengang Wang
2021-09-15  2:36   ` Joseph Qi

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