From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E4F7C40DFC4; Mon, 23 Mar 2026 14:17:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774275472; cv=none; b=Da0lRUOkbT5qcrDP+y9n1zgiOcw9H4n/Gpt99bOSHEuGoGCfbNFxsl9Q1YdCn+GRJqSNOgC52S+wW4N8OZ+ebuGhaNb/1Z6bDCzwyJkRVrX85p+5+Ndhyi5VM0sGGaz9CNn6Kzn6jKl0fUwiN3oN+2wwxUb5j9Z9mGl/KwfIstE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774275472; c=relaxed/simple; bh=tq34NGZOWzPQFUbwQot+pB3uV+lCBHYYgziPI9Ji6nk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Uh1mh7NJ8hsCO96MZzAsjiSikUMEoz48ck29Y2RUVh4X7+pXbXVF+nBiRZ+ZVV+9y+dS/nPRF49g0JLlsZ5chcea/etmaLBwyD0i83WBDy2cYhvF5J0RFxMMqKiCTZgpe6M9IDtTOliQ+iCV4sHZSYJlhjaWs8Cw09F0W5kG92I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=H8ulgR2+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="H8ulgR2+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 70954C4CEF7; Mon, 23 Mar 2026 14:17:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774275471; bh=tq34NGZOWzPQFUbwQot+pB3uV+lCBHYYgziPI9Ji6nk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H8ulgR2+n4i3LYaFAp7XlAXMxy7dUjua97ixpe7xym8SyfTUr/9qwbbqyuJdHOdde WRzJ/MIZ327KKoxpdjLFsAz3pL+zI7RMLj7M+H9xdIWXLXJZpqrvtl0CyNmHNVBoqj EClXAwJrdj1ufSiRuQnzG9PH76JaexSWdbwHB53M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Alan Stern , Fan Wu Subject: [PATCH 6.12 114/460] usb: renesas_usbhs: fix use-after-free in ISR during device removal Date: Mon, 23 Mar 2026 14:41:50 +0100 Message-ID: <20260323134529.438351484@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260323134526.647552166@linuxfoundation.org> References: <20260323134526.647552166@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fan Wu commit 3cbc242b88c607f55da3d0d0d336b49bf1e20412 upstream. In usbhs_remove(), the driver frees resources (including the pipe array) while the interrupt handler (usbhs_interrupt) is still registered. If an interrupt fires after usbhs_pipe_remove() but before the driver is fully unbound, the ISR may access freed memory, causing a use-after-free. Fix this by calling devm_free_irq() before freeing resources. This ensures the interrupt handler is both disabled and synchronized (waits for any running ISR to complete) before usbhs_pipe_remove() is called. Fixes: f1407d5c6624 ("usb: renesas_usbhs: Add Renesas USBHS common code") Cc: stable Suggested-by: Alan Stern Signed-off-by: Fan Wu Link: https://patch.msgid.link/20260303073344.34577-1-fanwu01@zju.edu.cn Signed-off-by: Greg Kroah-Hartman --- drivers/usb/renesas_usbhs/common.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/drivers/usb/renesas_usbhs/common.c +++ b/drivers/usb/renesas_usbhs/common.c @@ -811,6 +811,15 @@ static void usbhs_remove(struct platform usbhs_platform_call(priv, hardware_exit, pdev); reset_control_assert(priv->rsts); + + /* + * Explicitly free the IRQ to ensure the interrupt handler is + * disabled and synchronized before freeing resources. + * devm_free_irq() calls free_irq() which waits for any running + * ISR to complete, preventing UAF. + */ + devm_free_irq(&pdev->dev, priv->irq, priv); + usbhs_mod_remove(priv); usbhs_fifo_remove(priv); usbhs_pipe_remove(priv);