Re: [PATCH] aoe: fix the potential use-after-free problem in more places

[Markus Elfring]

> For fixing CVE-2023-6270, f98364e92662 patch moved dev_put() from
…

Please add a subject for the mentioned commit hash.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.9-rc6#n99


> This patch adds dev_hold() to those functions and also uses dev_put()
> when the skb_clone() returns NULL.

Please improve this change description with a corresponding imperative wording.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.9-rc6#n94


…
> Fixes: f98364e92662 ("aoe: fix the potential use-after-free problem in
> aoecmd_cfg_pkts")

I suggest to omit a line break for this tag.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.9-rc6#n145


…
> +++ b/drivers/block/aoe/aoecmd.c
…
> @@ -401,7 +402,8 @@ aoecmd_ata_rw(struct aoedev *d)
>  		__skb_queue_head_init(&queue);
>  		__skb_queue_tail(&queue, skb);
>  		aoenet_xmit(&queue);
> -	}
> +	} else
> +		dev_put(f->t->ifp->nd);
>  	return 1;
>  }
>
…
> @@ -617,7 +622,8 @@ probe(struct aoetgt *t)
>  		__skb_queue_head_init(&queue);
>  		__skb_queue_tail(&queue, skb);
>  		aoenet_xmit(&queue);
> -	}
> +	} else
> +		dev_put(f->t->ifp->nd);
>  }
>
>  static long
…

Should curly brackets be used for both if branches in these function implementations?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst?h=v6.9-rc6#n213

Regards,
Markus