netdev - Re: [PATCH net] sfc: fix use after free when disabling sriov

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Message-ID: <20220711203853.72f7565d@kernel.org>
Date:   Mon, 11 Jul 2022 20:38:53 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Íñigo Huguet <ihuguet@...hat.com>
Cc:     ecree.xilinx@...il.com, habetsm.xilinx@...il.com,
        davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        netdev@...r.kernel.org, Yanghang Liu <yanghliu@...hat.com>
Subject: Re: [PATCH net] sfc: fix use after free when disabling sriov

On Mon, 11 Jul 2022 15:45:20 +0200 Íñigo Huguet wrote:
> Use after free is detected by kfence when disabling sriov. What was read
> after being freed was vf->pci_dev: it was freed from pci_disable_sriov
> and later read in efx_ef10_sriov_free_vf_vports, called from
> efx_ef10_sriov_free_vf_vswitching.
> 
> Set the pointer to NULL at release time to not trying to read it later.

Please add a Fixes tag and repost. Does ef100 need the same fix? :(