Thread (10 messages) 10 messages, 4 authors, 2021-12-21

Re: [PATCH] usb: typec: ucsi: Only check the contract if there is a connection

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-12-20 16:55:19

On Mon, Dec 20, 2021 at 05:41:22PM +0200, Heikki Krogerus wrote:
On Mon, Dec 20, 2021 at 03:47:56PM +0100, Greg Kroah-Hartman wrote:
quoted
On Fri, Dec 17, 2021 at 05:14:42PM +0200, Heikki Krogerus wrote:
quoted
Hi,

On Fri, Dec 17, 2021 at 03:32:59PM +0100, Thorsten Leemhuis wrote:
quoted
Lo! Thx for working out a fix this quickly!

I'm just the regression tracker, but I think there are a few minor
details to improve here.

On 17.12.21 15:03, Heikki Krogerus wrote:
quoted
The driver must make sure there is an actual connection
before checking details about the USB Power Delivery
contract. Those details are not valid unless there is a
connection.

This fixes NULL pointer dereference that is caused by an
attempt to register bogus partner alternate mode that the
firmware on some platform may report before the actual
connection.

Fixes: 6cbe4b2d5a3f ("usb: typec: ucsi: Check the partner alt modes always if there is PD contract")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=215117
BugLink? Is that a tag we really use? Then I'm unaware of it. Greg is
the expert and can likely clarify, but that line afaik needs to replaced
by this:
Although not yet documented, it is the appropriate tag for the link to
the bug. It makes it clear that the link is to the bug and not to
the discussion on the list.
quoted
Link: https://bugzilla.kernel.org/show_bug.cgi?id=215117
Link:
https://lore.kernel.org/linux-usb/bug-215117-208809@https.bugzilla.kernel.org%2F/ (local)

Normally the last line would need a 's!linux-usb!r!', but seems the
kernel.org redirector doesn't work well in this particular case, so I
guess it's better this way than not at all :-/

The second line will also make the regression tracking bot automatically
close the issue (but I fear it might also fail due to the slash at the
end of the message-id :-/)
Greg will add the "Link" tag to the commit when, and if, he actually
takes the patch. I do not add it because I do not want any bots to
react to the patch before it has actually been accepted.
The link my scripts add is to the post on lore.kernel.org, not to
anywhere else.

So if this needs to point to a different report, like Thorsten shows
above, then that needs to be done "by hand".

I guess I'll go add these on my own :(
OK... so I don't prepare v2 then.
No, please do, I will not get to this for another few days because it
takes me more work :)
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