netdev - Re: [PATCH v2] net: macsec: fix potential resource leak in macsec_add_rxsa() and macsec_add

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Message-ID: <5668b7b52b1bd9714312042f0b19d01ba30246b1.camel@redhat.com>
Date:   Tue, 12 Jul 2022 15:15:49 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Jianglei Nie <niejianglei2021@....com>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: macsec: fix potential resource leak in
 macsec_add_rxsa() and macsec_add_txsa()

On Mon, 2022-07-11 at 15:28 +0800, Jianglei Nie wrote:
> init_rx_sa() allocates relevant resource for rx_sa->stats and rx_sa->
> key.tfm with alloc_percpu() and macsec_alloc_tfm(). When some error
> occurs after init_rx_sa() is called in macsec_add_rxsa(), the function
> released rx_sa with kfree() without releasing rx_sa->stats and rx_sa->
> key.tfm, which will lead to a resource leak.
> 
> We should call macsec_rxsa_put() instead of kfree() to decrease the ref
> count of rx_sa and release the relevant resource if the refcount is 0.
> The same bug exists in macsec_add_txsa() for tx_sa as well. This patch
> fixes the above two bugs.
> 
> Signed-off-by: Jianglei Nie <niejianglei2021@....com>

uhmmm.... this is getting weird. I already asked you 2 times to please
add a suitable Fixes tag to your commit message, and this patch has
been reposted unmodified...

Please, read every document under Documentation/process/ carefully, and
please really add the required tag next time.

If the above is not clear, please ask questions, but _do not repost_
your patch unmodified,

thanks!

Paolo