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=1794064583; b=aJmD3CkQpeFG/wHHbpZLAa4BY1K0OoNXAGgYsx/GKlJuSoI2A9XeTywj0MBNmPnlz5Il HdSx5SNXLsXQkElDGQm33lQbyvn2brcbXfXmKiVmd2JN5zDfOfhR7U6rfRZWCni2C6mBv BSXQvG9tYYdBEEvN42mkeat4YEFHNtyHDxm83z3Z9F9nGUj7ijekhr16iEfvVEip3e7Om GVLtp6WFypjSX6nF00YTyJTRGM8p3zPyuXEz06r+CpKHl2rbo4TX7CIycNVTBuNBJAPNy fMUs0Kzv9uPvpiWCNUh3wkTJQQCwmxXItQF0nQF8M0u2H9GdTHJblyA+h0s8ANx9uNA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794064583; 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=zdEGZECUaCTGmZPI295pDGjGBzph4pBq6lGeVik5Nxc=; b=lAhidUCeD01e7hHoErTbfRp9jzxT1uEIsbQ5vkpFSShbipO2RX9YrDYnNm1nhOWZSm4e uLdR6vmX8vauYqJbzMva9A136AVqhfh9lDJ7GTqqIzXfSyCa2TVb0WkK+kCmqOaOvIASB tHxPOpCdzj/bKMGTgWhjvBnxeq5ETSLkLUdgRBz8pbBrn48/g2HMvHPX2C1qfZCADbrLz 39C4HOWY++5lgs4ObX6aSOwAH53GlWZYZYz1DNf2jGSuQxUp/hw4iXmP6zwprR5k8xqcX r7FKjzKib83W8weiX3PsxQGFITAqUjzLgr6CtNNnur7GoZujl2c+u/mxmhlLvHkFJPg== 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=WaxI3JlZ; 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 02963606D833; Sat, 7 Nov 2026 15:16:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=WaxI3JlZ Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8B9CC1F008A1; Sat, 7 Nov 2026 15:16:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794064582; bh=zdEGZECUaCTGmZPI295pDGjGBzph4pBq6lGeVik5Nxc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=WaxI3JlZcpE9gyjP55jFpai5yiZO/Z27m1B7YU9F9hZADcj92YTE7jF4kg7GjIUE9 HdyyjsQlv94l3KN3k6aVLQD3HB+NnbNXMuWa17CzfXZZYCSCwJtDvZZ0rZ6jD7Ypu2 yaqoKvmoiMe5ZaOVsPoyxZXO7KHG//ziwF+QYF38= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wentao Liang , Johan Hovold , Sasha Levin Subject: [PATCH 7.3 0601/1257] USB: cdc-acm: fix urb leak on disconnect Date: Sat, 7 Nov 2026 08:48:17 -0500 Message-ID: <20261107134955.917059125@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134939.434104957@linuxfoundation.org> References: <20261107134939.434104957@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold [ Upstream commit 648b08aa37c1b24a61662ad78964f2bca659ca26 ] Make sure to drop the reference taken by usb_anchor_urb() when removing URBs from the delayed URB anchor to prevent them from leaking when the device is later disconnected. Fixes: 140cb81ac8c6 ("USB: cdc-acm: fix broken runtime suspend") Reported-by: Wentao Liang Link: https://lore.kernel.org/20260917161217.2161883-1-vulab@iscas.ac.cn/ Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Johan Hovold Link: https://patch.msgid.link/20261009122934.464142-1-johan@kernel.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/class/cdc-acm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 0d3f815b2f1e8..6a1c574634949 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -782,6 +782,7 @@ static void acm_port_shutdown(struct tty_port *port) urb = usb_get_from_anchor(&acm->delayed); if (!urb) break; + usb_put_urb(urb); wb = urb->context; wb->use = false; usb_autopm_put_interface_async(acm->control); @@ -1710,7 +1711,7 @@ static int acm_resume(struct usb_interface *intf) urb = usb_get_from_anchor(&acm->delayed); if (!urb) break; - + usb_put_urb(urb); acm_start_wb(acm, urb->context); } -- 2.53.0