linux-kernel - Re: [PATCH] net: page_pool: Fix NULL pointer dereference in page_pool

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Message-ID: <20231130230812.16461d0f@kernel.org>
Date:   Thu, 30 Nov 2023 23:08:12 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Bert Karwatzki <spasswolf@....de>
Cc:     almasrymina@...gle.com, edumazet@...gle.com, hawk@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: page_pool: Fix NULL pointer dereference in
 page_pool_unlist()

On Thu, 30 Nov 2023 20:25:42 +0100 Bert Karwatzki wrote:
> When the the hlist_node pool->user.list is in an in an unhashed state,
> calling hlist_del() leads to a NULL pointer dereference. This happens
> e. g. when rmmod'ing the mt7921e (mediatek wifi driver) kernel module.
> An additional check fixes the issue.
> 
> Fixes: 083772c9f972dc ("net: page_pool: record pools per netdev")
> 
> Signed-off-by: Bert Karwatzki <spasswolf@....de>

Thanks for the patch, we got a couple of similar submissions,
and merged the first one to be posted.. should be fixed in net-next now.
-- 
pw-bot: na