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 B1B813BAD9B; Mon, 23 Mar 2026 15:06:07 +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=1774278367; cv=none; b=qxuSfUXKQt2VRubqdPiZ6hD4/Bny6BragEw53NixwY9UR1Ri4ncSJxCicl1xvZXt2DIKSAQX1oy+DT62mGY9pSzAu9+PbJ++9W/nErliSIwNs7LHjEzg/aj99KeIRldbhnxHusZN07UiuKI/JxkSJXuZzCBYKSN9BYgbiOG4U/I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774278367; c=relaxed/simple; bh=gKwun3kvcEVFj3lfmCOtyQbXMT3F/uG/j7UvhVDZKEo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=H2h/aLunsnJ7/mjcaFAJhyYpreI2FQIQ26AghH5fNkd7OHhAAi3KN9DMSl3y2WyP0C0AB6dG62orQHwD0qcevHyPPsYCxKcimplw/3in1AfmzbaZN6KdJD2hxEXWZUUKHU81S2nFc6vR2G5qFo48XBJU6rzuRJE5gluVG8Siztk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=lkwU4gRI; 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="lkwU4gRI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E5E42C4CEF7; Mon, 23 Mar 2026 15:06:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774278367; bh=gKwun3kvcEVFj3lfmCOtyQbXMT3F/uG/j7UvhVDZKEo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lkwU4gRI7+YbK2EGJTuJhmbd0wsTShwBAKuajWwLkmdAYD3SlXuUpvpuI97IHf2Ja kFiVHRPvflOzc6xbhhVcTAkf1EJW41cg3eBOogQsLmxFIe8+sGRLCILzbE8xw5fj+U KMmaHUpuHWDU/juNbrdMCjeFBtxPnRusw/sm4/f8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ziyi Guo , stable Subject: [PATCH 6.6 286/567] usb: image: mdc800: kill download URB on timeout Date: Mon, 23 Mar 2026 14:43:26 +0100 Message-ID: <20260323134540.903163800@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260323134533.749096647@linuxfoundation.org> References: <20260323134533.749096647@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ziyi Guo commit 1be3b77de4eb89af8ae2fd6610546be778e25589 upstream. mdc800_device_read() submits download_urb and waits for completion. If the timeout fires and the device has not responded, the function returns without killing the URB, leaving it active. A subsequent read() resubmits the same URB while it is still in-flight, triggering the WARN in usb_submit_urb(): "URB submitted while active" Check the return value of wait_event_timeout() and kill the URB if it indicates timeout, ensuring the URB is complete before its status is inspected or the URB is resubmitted. Similar to - commit 372c93131998 ("USB: yurex: fix control-URB timeout handling") - commit b98d5000c505 ("media: rc: iguanair: handle timeouts") Signed-off-by: Ziyi Guo Cc: stable Link: https://patch.msgid.link/20260209151937.2247202-1-n7l8m4@u.northwestern.edu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/image/mdc800.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/usb/image/mdc800.c +++ b/drivers/usb/image/mdc800.c @@ -731,9 +731,11 @@ static ssize_t mdc800_device_read (struc mutex_unlock(&mdc800->io_lock); return len-left; } - wait_event_timeout(mdc800->download_wait, + retval = wait_event_timeout(mdc800->download_wait, mdc800->downloaded, msecs_to_jiffies(TO_DOWNLOAD_GET_READY)); + if (!retval) + usb_kill_urb(mdc800->download_urb); mdc800->downloaded = 0; if (mdc800->download_urb->status != 0) {