Re: [PATCH 2/5] net: renesas: rswitch: fix leaked pointer on error path

[Jakub Kicinski <kuba@kernel.org>]

On Mon,  2 Dec 2024 18:49:01 +0500 Nikita Yushchenko wrote:
> If error path is taken while filling descriptor for a frame, skb
> pointer is left in the entry. Later, on the ring entry reuse, the
> same entry could be used as a part of a multi-descriptor frame,
> and skb for that new frame could be stored in a different entry.
> 
> Then, the stale pointer will reach the completion routine, and passed
> to the release operation.
> 
> Fix that by clearing the saved skb pointer at the error path.

Why not move the assignment down, then? After we have successfully
mapped all entries?

Coincidentally rswitch_ext_desc_set() calls
rswitch_ext_desc_set_info1() for each desc, potentially timestamping
the same frame multiple times? Isn't that an issue?

I agree with Jake that patches 4 and 5 don't seem like obvious fixes,
would be great if you could post them as separate series, they need to
go to a different tree.
-- 
pw-bot: cr