Re: CVE-2024-42226: usb: xhci: prevent potential failure in handle_tx_event() for Transfer events without TRB

[Jinjiang Tu]

在 2024/8/6 19:15, Neronin, Niklas 写道:
> On 06/08/2024 12.25, Jinjiang Tu wrote:
> > Hi, Niklas
> >
> > The commit 66cb618bf0bb ("usb: xhci: prevent potential failure in handle_tx_event() for Transfer events without TRB")
> > has been assigned with CVE-2024-42226, but the commit has been reverted in 6.1.99 and 6.6.39 due to
> > performance regression. Do you have a plan to address this issue, or if this CVE should be rejected?
> >
> > Thanks!
> Hi,
>
> Currently, I have no plan to address this issue.
>
> The commit in question, was not intended for any previous Linux versions.
> It was created as part of my handle_tx_event() rework series. Future changes
> in said series could potentially trigger the issue, so preemptively preventing
> it was both simpler and more secure.
I don't know if I'm understanding this right, do you mean the issue 
mentioned in
the commit will not be actually triggered in previous Linux versions? 
Now the commit
is reverted in v6.1 and v6.6, but the issue can not be triggered in 
these versions,
so no more fixes patch is needed for these LTS versions?

Thanks！

> Thanks,
> Niklas