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

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Aug 07, 2024 at 12:31:56PM +0300, Neronin, Niklas wrote:
> 
> 
> On 06/08/2024 16.53, Jinjiang Tu wrote:
> > 
> > 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?
> 
> I'm not aware of any cases where this issue has been triggered. As it has been in the
> Linux kernel for a long time, I assume it does not trigger.

Ok, now rejected, thanks.

greg k-h