From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 70DD71DD9AC; Tue, 13 Oct 2026 12:37:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791895065; cv=none; b=KtltAd77M6QJWWmH0CnZ7W3GR0AeXsM0oAjSFr1C6qiC8NM2r4wOCNEAQ7yl/wIEElPWBzhd30xeV7IXaVoDi6mFsb68Mz6ocTeppMIhjeokh2jAOxINzIy7iwHirjt5KnoyzHpqKr/Qsu/S4EWVAd2gnSs0lSihBN8dGySFTNI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791895065; c=relaxed/simple; bh=WXPZeTKRUxRgarTPOFErZDk9qNUwReCSkxQNNdM4r9s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lW0AToxQJoLD6MeGrFsjaQDzbyfmW+zwybOLwNTMiS2O+I2K+DqO+PNhkghxttUALRy/GZBNk7KP+RF0nNmphisIFs1nPhTHAYHDYwqQj6qDHyyixCJqYtALbjnetbdYrHcPODs6vaqfhtGitVrXeNyCWxKph0/1b9lHu4/UiY0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xrTWHzjQ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xrTWHzjQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C12211F00898; Tue, 13 Oct 2026 12:37:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1791895063; bh=flZkMZa7hWoREsO1WkUws66TYoagc/ah2Q8qtxlUnPQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=xrTWHzjQgVdgd9MmZFUWY/nQWAj/gOZU/Q1s1gZancRpcIvQ6yo7679cucJg4K5Ja UEHZKarFtrSsy8jdRl5lKenZohAD//l+LnyDnPA4LlaGwcJfcgbY0m0MCNmuLu0MBd h8SP07E4lOOY0BLrGx/Lf5qvu47qj8PvPll3QgL0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Hui Peng , Alan Stern Subject: [PATCH 6.12 150/497] usb: core: clear both ep_in and ep_out for non-ep0 control endpoints Date: Tue, 13 Oct 2026 13:35:17 +0200 Message-ID: <20261013112911.447625782@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261013112907.864180619@linuxfoundation.org> References: <20261013112907.864180619@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev 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: Hui Peng commit 0e8baa78d872f2db440d8b9ded946ab8dceb89eb upstream. In usb_enable_endpoint(), non-zero control endpoints (where usb_endpoint_xfer_control(&ep->desc) is true) populate both dev->ep_in[epnum] and dev->ep_out[epnum] with the same struct usb_host_endpoint pointer. However, usb_disable_endpoint() only clears either dev->ep_out[epnum] or dev->ep_in[epnum] depending on the direction bit of epaddr when reset_hardware is set, leaving the opposite direction's array slot pointing to the disabled/freed endpoint. Clear both dev->ep_out[epnum] and dev->ep_in[epnum] when disabling a non-ep0 control endpoint with reset_hardware set, and update the function kerneldoc accordingly. Tested in QEMU against Linux 7.3.0-rc3 using dummy_hcd and raw-gadget to enumerate a USB device with a non-zero control endpoint (bEndpointAddress 0x01, bmAttributes USB_ENDPOINT_XFER_CONTROL), verifying that both dev->ep_in[1] and dev->ep_out[1] are cleared when the interface is disabled. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable Assisted-by: LLM Signed-off-by: Hui Peng Acked-by: Alan Stern Link: https://patch.msgid.link/20260920231702.110963-1-benquike@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/message.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -1335,7 +1335,8 @@ static void remove_intf_ep_devs(struct u * * Disables the endpoint for URB submission and nukes all pending URBs. * If @reset_hardware is set then also deallocates hcd/hardware state - * for the endpoint. + * for the endpoint (clearing both ep_in and ep_out pointers for + * bidirectional non-ep0 control endpoints). */ void usb_disable_endpoint(struct usb_device *dev, unsigned int epaddr, bool reset_hardware) @@ -1356,6 +1357,11 @@ void usb_disable_endpoint(struct usb_dev dev->ep_in[epnum] = NULL; } if (ep) { + if (reset_hardware && epnum != 0 && + usb_endpoint_xfer_control(&ep->desc)) { + dev->ep_out[epnum] = NULL; + dev->ep_in[epnum] = NULL; + } ep->enabled = 0; usb_hcd_flush_endpoint(dev, ep); if (reset_hardware)