linux-kernel - Re: [PATCH] PCI/ASPM: fix UAF by removing cached downstream

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Date:   Sat, 29 Apr 2023 22:58:12 +0800
From:   Ding Hui <dinghui@...gfor.com.cn>
To:     bhelgaas@...gle.com
Cc:     dinghui@...gfor.com.cn, sathyanarayanan.kuppuswamy@...ux.intel.com,
        vidyas@...dia.com, david.e.box@...ux.intel.com,
        kai.heng.feng@...onical.com, michael.a.bottini@...ux.intel.com,
        rajatja@...gle.com, qinzongquan@...gfor.com.cn,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI/ASPM: fix UAF by removing cached downstream

On 2023/4/29 9:26 下午, Ding Hui wrote:
> If the function 0 of a multifunction device is removed, an freed

Typo "a freed" will be fix in v2.


> downstream pointer will be left in struct pcie_link_state, and then
> when pcie_config_aspm_link() be invoked from any path, we will get a
> KASAN use-after-free report.

-- 
Thanks,
-dinghui