From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Chao Yu <chao@kernel.org>
Cc: Gao Xiang <gaoxiang25@huawei.com>, Chao Yu <yuchao0@huawei.com>,
devel@driverdev.osuosl.org, linux-fsdevel@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
linux-erofs@lists.ozlabs.org, Miao Xie <miaoxie@huawei.com>,
weidu.du@huawei.com, Fang Wei <fangwei1@huawei.com>,
stable@vger.kernel.org
Subject: Re: [PATCH 5/6] staging: erofs: detect potential multiref due to corrupted images
Date: Tue, 20 Aug 2019 19:19:42 -0700 [thread overview]
Message-ID: <20190821021942.GA14087@kroah.com> (raw)
In-Reply-To: <f302710e-0c7f-8695-d692-be0c01c431ea@kernel.org>
On Mon, Aug 19, 2019 at 10:57:42PM +0800, Chao Yu wrote:
> On 2019-8-19 18:34, Gao Xiang wrote:
> > As reported by erofs-utils fuzzer, currently, multiref
> > (ondisk deduplication) hasn't been supported for now,
> > we should forbid it properly.
> >
> > Fixes: 3883a79abd02 ("staging: erofs: introduce VLE decompression support")
> > Cc: <stable@vger.kernel.org> # 4.19+
> > Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
> > ---
> > drivers/staging/erofs/zdata.c | 16 ++++++++++++++--
> > 1 file changed, 14 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/staging/erofs/zdata.c b/drivers/staging/erofs/zdata.c
> > index aae2f2b8353f..5b6fef5181af 100644
> > --- a/drivers/staging/erofs/zdata.c
> > +++ b/drivers/staging/erofs/zdata.c
> > @@ -816,8 +816,16 @@ static int z_erofs_decompress_pcluster(struct super_block *sb,
> > pagenr = z_erofs_onlinepage_index(page);
> >
> > DBG_BUGON(pagenr >= nr_pages);
> > - DBG_BUGON(pages[pagenr]);
> >
> > + /*
> > + * currently EROFS doesn't support multiref(dedup),
> > + * so here erroring out one multiref page.
> > + */
> > + if (unlikely(pages[pagenr])) {
> > + DBG_BUGON(1);
> > + SetPageError(pages[pagenr]);
> > + z_erofs_onlinepage_endio(pages[pagenr]);
>
> Should set err meanwhile?
I've skipped this patch in this series for now, and applied the rest.
thanks,
greg k-h
next prev parent reply other threads:[~2019-08-21 2:19 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-17 8:23 [PATCH] erofs: move erofs out of staging Gao Xiang
2019-08-17 21:19 ` Richard Weinberger
2019-08-17 22:07 ` Gao Xiang
2019-08-17 23:25 ` Richard Weinberger
2019-08-17 23:38 ` Gao Xiang
2019-08-18 0:04 ` Gao Xiang
2019-08-18 0:52 ` Gao Xiang
2019-08-18 8:16 ` Richard Weinberger
2019-08-18 8:45 ` Gao Xiang
2019-08-18 9:03 ` Richard Weinberger
2019-08-18 9:09 ` Greg Kroah-Hartman
2019-08-18 9:21 ` Richard Weinberger
2019-08-18 10:12 ` Chao Yu
2019-08-18 15:11 ` Theodore Y. Ts'o
2019-08-18 15:58 ` Christoph Hellwig
2019-08-18 16:16 ` Eric Biggers
2019-08-18 16:22 ` Christoph Hellwig
2019-08-18 16:33 ` Gao Xiang
2019-08-18 17:29 ` Eric Biggers
2019-08-18 17:47 ` Christoph Hellwig
2019-08-18 18:16 ` Gao Xiang
2019-08-18 20:14 ` Gao Xiang
2019-08-19 7:35 ` Richard Weinberger
2019-08-19 8:02 ` Gao Xiang
2019-08-19 10:34 ` [PATCH 0/6] staging: erofs: first stage of corrupted compressed images Gao Xiang
2019-08-19 10:34 ` [PATCH 1/6] staging: erofs: some compressed cluster should be submitted for corrupted images Gao Xiang
2019-08-19 14:36 ` Chao Yu
2019-08-19 14:39 ` Chao Yu
2019-08-19 10:34 ` [PATCH 2/6] staging: erofs: cannot set EROFS_V_Z_INITED_BIT if fill_inode_lazy fails Gao Xiang
2019-08-19 14:43 ` Chao Yu
2019-08-19 10:34 ` [PATCH 3/6] staging: erofs: add two missing erofs_workgroup_put for corrupted images Gao Xiang
2019-08-19 14:40 ` Chao Yu
2019-08-19 10:34 ` [PATCH 4/6] staging: erofs: avoid loop in submit chains Gao Xiang
2019-08-19 14:50 ` Chao Yu
2019-08-19 10:34 ` [PATCH 5/6] staging: erofs: detect potential multiref due to corrupted images Gao Xiang
2019-08-19 14:57 ` Chao Yu
2019-08-21 2:19 ` Greg Kroah-Hartman [this message]
2019-08-21 14:01 ` [PATCH v2 " Gao Xiang
2019-08-21 14:24 ` Chao Yu
2019-08-19 10:34 ` [PATCH 6/6] staging: erofs: avoid endless loop of invalid lookback distance 0 Gao Xiang
2019-08-19 14:58 ` Chao Yu
2019-08-19 16:09 ` [PATCH] erofs: move erofs out of staging Darrick J. Wong
2019-08-19 20:30 ` Gao Xiang
2019-08-20 0:55 ` Qu Wenruo
2019-08-20 1:55 ` Gao Xiang
2019-08-20 2:24 ` Chao Yu
2019-08-20 2:38 ` Qu Wenruo
2019-08-20 7:15 ` Chao Yu
2019-08-20 8:46 ` Qu Wenruo
2019-08-21 2:12 ` Chao Yu
2019-08-20 15:56 ` Theodore Y. Ts'o
2019-08-20 16:35 ` Gao Xiang
2019-08-21 0:51 ` Theodore Y. Ts'o
2019-08-21 1:34 ` Chao Yu
2019-08-21 1:48 ` Darrick J. Wong
2019-08-21 1:57 ` Chao Yu
2019-08-20 3:33 ` Miao Xie
2019-08-20 3:46 ` Gao Xiang
2019-08-20 6:04 ` Qu Wenruo
2019-08-20 6:22 ` Gao Xiang
2019-08-19 7:37 ` Richard Weinberger
2019-08-18 17:43 ` Theodore Y. Ts'o
2019-08-18 16:03 ` Gao Xiang
2019-08-18 17:06 ` Richard Weinberger
2019-08-18 17:46 ` Theodore Y. Ts'o
2019-08-18 18:00 ` Richard Weinberger
2019-08-18 18:31 ` Gao Xiang
2019-08-18 9:28 ` Gao Xiang
2019-08-19 5:28 ` [PATCH] erofs: Use common kernel logging style Joe Perches
2019-08-19 5:52 ` Gao Xiang
2019-08-19 5:47 ` Joe Perches
2019-08-19 6:08 ` Gao Xiang
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