From: Krzysztof Kozlowski <krzk@kernel.org>
To: Guangshuo Li <lgs201920130244@gmail.com>,
Lee Jones <lee@kernel.org>, John Stultz <john.stultz@linaro.org>,
mfd@lists.linux.dev, linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Subject: Re: [PATCH] mfd: hi655x-pmic: fix IRQ action memory leak on removal
Date: Tue, 27 Oct 2026 16:27:00 +0100 [thread overview]
Message-ID: <c04f2ba8-fc83-4118-a26a-76ea8cbee518@kernel.org> (raw)
In-Reply-To: <20261027024609.117371-1-lgs201920130244@gmail.com>
On 27/10/2026 03:46, Guangshuo Li wrote:
> hi655x_pmic_remove() currently removes the regmap IRQ chip before
> removing the MFD child devices. regmap_del_irq_chip() disposes the
> child IRQ mappings and removes their IRQ descriptors.
>
> The hi65xx-powerkey child registers interrupt handlers using
> devm_request_any_context_irq(). During child device removal, the
> device-managed cleanup calls free_irq(), but the corresponding IRQ
> descriptors are no longer available. As a result, the allocated
> struct irqaction objects referenced by irq_desc->action are not
> freed, causing a memory leak.
>
> Remove the MFD child devices first, allowing their device-managed
> IRQ handlers to be released while the IRQ mappings are still valid.
> Then remove the regmap IRQ chip and its IRQ domain.
>
> This issue was found by our static analysis tool under development.
More of postings by bot ignoring any feedback.
Best regards,
Krzysztof
next prev parent reply other threads:[~2026-10-27 15:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-27 2:46 Guangshuo Li
2026-10-27 15:27 ` Krzysztof Kozlowski [this message]
2026-10-27 16:22 ` Guangshuo Li
2026-10-27 16:23 ` Lee Jones
2026-10-27 16:42 ` Krzysztof Kozlowski
2026-10-27 16:24 ` Lee Jones
2026-10-27 16:34 ` Guangshuo Li
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