linux-kernel - Re: [PATCH v4] block: Fix use-after-free in blkdev

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Message-ID: <CA+icZUWYJ70W9E=Y-Cx92Ywd=pVgj9RAf2KsdapiVsXQwLDAnw@mail.gmail.com>
Date:   Mon, 8 Jun 2020 09:09:40 +0200
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Jason Yan <yanaijie@...wei.com>, viro@...iv.linux.org.uk,
        axboe@...nel.dk, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        Ming Lei <ming.lei@...hat.com>, Jan Kara <jack@...e.cz>,
        Hulk Robot <hulkci@...wei.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH v4] block: Fix use-after-free in blkdev_get()

On Mon, Jun 8, 2020 at 8:52 AM Sedat Dilek <sedat.dilek@...il.com> wrote:
>
> On Mon, Jun 8, 2020 at 8:47 AM Sedat Dilek <sedat.dilek@...il.com> wrote:
> >
> > On Mon, Jun 8, 2020 at 8:18 AM Christoph Hellwig <hch@....de> wrote:
> > >
> > > Looks good,
> > >
> > > Reviewed-by: Christoph Hellwig <hch@....de>
> > >
> > > Can you dig into the history for a proper fixes tag?
> >
> > [ CC Dan ]
> >
> > Dan gave the hint for the Fixes: tag in reply to the first patch:
> >
> > > The Fixes tag is a good idea though:
> > >
> > > Fixes: 89e524c04fa9 ("loop: Fix mount(2) failure due to race with LOOP_SET_FD")
> >
> > > It broke last July.  Before that, we used to check if __blkdev_get()
> > > failed before dereferencing "bdev".
> >
>
> Here is the Link.
>
> https://www.spinics.net/lists/linux-block/msg54825.html
>

Really CC Dan in 3rd attempt.

OMG, I need a coffee - urgently.

- Sedat -