netdev - Re: [BUG Report] KASAN: slab-use-after-free in page_pool_recycle_in

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Message-ID: <20250519154723.4b2243d2@kernel.org>
Date: Mon, 19 May 2025 15:47:23 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Mina Almasry <almasrymina@...gle.com>
Cc: "dongchenchen (A)" <dongchenchen2@...wei.com>, hawk@...nel.org,
 ilias.apalodimas@...aro.org, davem@...emloft.net, edumazet@...gle.com,
 pabeni@...hat.com, horms@...nel.org, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, zhangchangzhong@...wei.com
Subject: Re: [BUG Report] KASAN: slab-use-after-free in
 page_pool_recycle_in_ring

On Mon, 19 May 2025 12:20:59 -0700 Mina Almasry wrote:
> Clearly this is not working, but I can't tell why.

I think your fix works but for the one line that collects recycling
stats. If we put recycling stats under the producer lock we should
be safe.