linux-kernel - Re: [PATCH] scsi: sd: Jump to out_free_index if device_add{,

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Message-ID: <YkKvZ1bp0Q5bi2ln@infradead.org>
Date:   Tue, 29 Mar 2022 00:04:07 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>, axboe@...nel.dk,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org,
        syzbot+f08c77040fa163a75a46@...kaller.appspotmail.com
Subject: Re: [PATCH] scsi: sd: Jump to out_free_index if device_add{,_disk}()
 fail

On Tue, Mar 29, 2022 at 08:18:16AM +0200, Fabio M. De Francesco wrote:
> Yes, correct. I've just looked at how put_device() is implemented. I didn't 
> know how it works until you made me notice. Thanks!
> 
> Aside this I sent another diff to Syzbot. Today, at 4.30 CET, it replied again
> that, after applying and testing my new patch, Syzkaller was not anymore able 
> to trigger the memory leak that it had reported.
> 
> This is the new diff...

Yes, this new diff makes much more sense.