linux-kernel - Re: [PATCH] power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler

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Message-Id: <176981186774.331784.1512073948945933608.b4-ty@collabora.com>
Date: Fri, 30 Jan 2026 23:24:27 +0100
From: Sebastian Reichel <sebastian.reichel@...labora.com>
To: Sebastian Reichel <sre@...nel.org>, Nikita Travkin <nikita@...n.ru>, 
 Waqar Hameed <waqar.hameed@...s.com>
Cc: kernel@...s.com, linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] power: supply: pm8916_lbc: Fix use-after-free for
 extcon in IRQ handler


On Fri, 23 Jan 2026 11:24:20 +0100, Waqar Hameed wrote:
> Using the `devm_` variant for requesting IRQ _before_ the `devm_`
> variant for allocating/registering the `extcon` handle, means that the
> `extcon` handle will be deallocated/unregistered _before_ the interrupt
> handler (since `devm_` naturally deallocates in reverse allocation
> order). This means that during removal, there is a race condition where
> an interrupt can fire just _after_ the `extcon` handle has been
> freed, *but* just _before_ the corresponding unregistration of the IRQ
> handler has run.
> 
> [...]

Applied, thanks!

[1/1] power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler
      commit: 23067259919663580c6f81801847cfc7bd54fd1f

Best regards,
-- 
Sebastian Reichel <sebastian.reichel@...labora.com>