From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793212916; b=w4RxWdtlyRTKzGUjZ5JdQ5FBWC9O4wWY/0NOniXu2ZwbqDL8n2CukOzirmrXQNHXRGw4 Tm2P13C+ftguVufyexQk87B1Hdq6/nMQykmgXen3laNWlJ6Bo4KjjzUsi/u5h2n/sZf7v gUzmc5u/XpvVvAKqsudBPdBvLhn9u361LaMgH0Q5T+rYH5Ci9uuJOKOTHzwIpxK1H3RNl vv1jB5Zh9mPDZRo/O73tPSaACw2/rpVszAheM4z2yaa1/HUjhair8+TihsWgGM0HF770p fJI8PdWC5tsPRt+WC55b5jBRrmwg6/ig4C8HpZqdpDVTtRJJZR/154YzVTjVW23IIaA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793212916; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=H1BklHVo4y5cF5y4Oyk2hkmv8+x40NcwQqj0AT38qkU=; b=oL0uiRFPLRxP8ymsdoBmcQU9N3uVWoP7vKffOvUG1izrxAPWiWkcPya2aydXUEj/r4pW cT7zFiR6VKEz9QFbk7RQr8PQRZIG9lySLtfGqpPfwGBs/Hj7/+ooi6NIu/qkk2YypMqxi ED+ajeBTpA7KSr043YCOb0s7/bBdqhc+zMEvmzei9TNBsaN7EkO2HMxmYG9KqTOFi5Hdc RoTxhMTYVGwM88GvMXqjFIBiV8P8xa4cs2KtgKjCG1CvOefBC4eLkWaq2VXYGvo97kP/g jom8/FhiouBaCeyzJbse8KvfbsAIO1UjiLvHD1evt/SbctJ1/3t+RnnqloFudl8JcBw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=BjLtJwWq; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A1B7260A261D; Wed, 28 Oct 2026 18:41:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=BjLtJwWq Received: by smtp.kernel.org (Postfix) with ESMTPSA id F389C1F01825; Wed, 28 Oct 2026 18:41:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793212916; bh=H1BklHVo4y5cF5y4Oyk2hkmv8+x40NcwQqj0AT38qkU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=BjLtJwWqfErNWIbUj53BLCgAGpk7D2S/8zvlPcm20MCWdS4Mq2EF0Xw4gBuKAQC96 gl33n1wlClHAkrNZY/NOb6JfdvDXEUsITxrRbce+Dapk7cz93jaGvuyX22Vw020nPe xCmo2pSb0Kqgfnmcco49hbR+jtplVcnRqxxnqdoI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold Subject: [PATCH 6.1 0322/1887] USB: serial: fix dynamic id driver deregistration race Date: Wed, 28 Oct 2026 17:40:18 +0100 Message-ID: <20261028170506.557676847@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170459.200466217@linuxfoundation.org> References: <20261028170459.200466217@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit 63594e8ffe097bc0b7639936f33799a7653dded2 upstream. Only free the dynamic ids after having deregistered the driver and removed the "new_id" attribute to avoid leaking any id added by a racing write to the attribute. Fixes: 93bacefc4cc0 ("USB serial: add dynamic id support to usb-serial core") Cc: stable@vger.kernel.org # 2.6.21 Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/serial/bus.c +++ b/drivers/usb/serial/bus.c @@ -165,7 +165,7 @@ int usb_serial_bus_register(struct usb_s void usb_serial_bus_deregister(struct usb_serial_driver *driver) { - free_dynids(driver); driver_unregister(&driver->driver); + free_dynids(driver); }