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=1793211058; b=QiDpW6X0kIIR1csG/Re5zfGZm0eLPUc6Vl+fpYG0WodNex88/gsIxCfyt0931TOgzrFq /DyhB5A5Va4kWFt/42JWp6XOjKQT4W6KE7itkHLRZPy2OgWrjxkWdaevR26mTFQTeNjFF ELhF8mOFqURSiMSChdWD68F1tmbo3ydugPgZCJ4D+Cg5xkYHo9CbWHJUJDdN3AGWev7XW g5LsZ/pJrSb69kbOSGVHqOqZa5nHI84/3BEDexvzxujzkwlNWB1nTtYJWPNuL9svyAGSg +8u7JUmPSHJSVgK/BOSc3kPDJpnrQPda/V3WGtH4cX/BwHoAaS7HkFEHgfFR19nTHCA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793211058; 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=OTakROPhkF5Vq+ji66gmzB7VcfhJV781phDDCVBDob8=; b=NgpRK9QAnoHGmPv0pm89B5kCRsCffgRui/j9djpZ0q3q15JksKcWj+Bd0I8qqLI9hrff GCZePFjKJlFNjpxmfJZB9Qbd79+UdcEJwhN04OmFV3hjqLRd6FUz9xoFkgeChUf2FuTx4 sLkhna6+4t+qj3msoWulEcgU8oibXwjtm1BEG2sKsjRZFijpgOnQKAKs67N88ATALpx+3 OdpUOXYlPS7mt4MgjdMNfAFx0jBip56vlKGRWkEjN0OZopUycRIQfj31ntHKGWJE9ezhf hXzfR+T9qCCWj7QMRHmlxTyW8m4XKUFI/e9fPpoI6EJWO9j1k+vZ38d6UOG3tCLhrHQ== 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=NlqaWERJ; 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 764A2606A969; Wed, 28 Oct 2026 18:10:58 +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=NlqaWERJ Received: by smtp.kernel.org (Postfix) with ESMTPSA id A68761F031E3; Wed, 28 Oct 2026 18:10:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793211058; bh=OTakROPhkF5Vq+ji66gmzB7VcfhJV781phDDCVBDob8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=NlqaWERJzswDO/ynEfD0Y6AvWC1NZ/VVo3uhXl1PoU42cK8JQSsYNULV5c92i1prc ZAsTstzjIh6l++MoonRbVdRBoXgfg3RX48vTGf5e+swEzDkZI1+2EwT529fpG6IFs4 rkeJRR5Oks4ProYfL5OsAfqfK0onwmb8EEqQLx/M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold Subject: [PATCH 5.15 244/571] USB: serial: fix dynamic id driver deregistration race Date: Wed, 28 Oct 2026 17:56:31 +0100 Message-ID: <20261028170013.796172407@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170008.009143722@linuxfoundation.org> References: <20261028170008.009143722@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 5.15-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 @@ -167,7 +167,7 @@ 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); }