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 8625428505E; Mon, 13 Apr 2026 16:24:18 +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=1776097458; cv=none; b=NNkXyowQPrN9NLa7yEaId0JnQN3kvI6yUUxtLGn1Zl+3AitZ8IBie32zpazD3xjDiYZckPdhEIHAcaCEYl+g+Y+EaFhkAU+eu70q8iblGV/mrHxPPROlveVv9FGeUb7VlrQJhAELB65GW64SbM9BGjsaWOrqf/jr8HGvyqZgKrY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097458; c=relaxed/simple; bh=1AUal/0501TvLxmU552EEXzDgzBvn6WzrlrKNMwtE3g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ekcd6k/FSwQM4kQwKG8wYaK4GFNQvfd8wpMBaJOXz9q7NLzaN6kw1Kh/4RqPsQha0LC//NwJbSR18Gk4hM211GKeNu/iPoJnQ/pvdNPhZW8i5QfAYSxjhtHXRA9iJc7QP2GJHchiBr1GgV4lASNswBDw+ocICj+i1Y15ICRBync= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=fSX076G+; 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="fSX076G+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D54DC2BCAF; Mon, 13 Apr 2026 16:24:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776097458; bh=1AUal/0501TvLxmU552EEXzDgzBvn6WzrlrKNMwtE3g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fSX076G++1yO+Yd/s5YHGjBl1elJp1KAfMmTLJ4+5s41KRcNLCayBmUwOQsWOm8bz JscqvZWzg8JLiRMUJXW/ZgmaIcH0op2NTP2fCszcm1HfjpztzqG+DvKAcdH+r6nzwT 0TG2GZnq8vA2yj+2igqJ99zF6DqFZaSIzdnlo/g4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Alan Stern , Fan Wu Subject: [PATCH 5.15 144/570] usb: renesas_usbhs: fix use-after-free in ISR during device removal Date: Mon, 13 Apr 2026 17:54:35 +0200 Message-ID: <20260413155835.837190443@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@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 5.15-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 @@ -804,6 +804,15 @@ 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);