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 BD8B135C1B4; Mon, 23 Feb 2026 12:11:01 +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=1771848661; cv=none; b=NF7HZTCp2FfFC+3kQ0P1XWtrBG2MVqzyyHokpAZTTB1Pc5se3qBFwRqUkkg3qa1AcQm6NtWTr6IM9sQ5LhsLKlGweg1r51MIX9UVVggah4gw1BcZb2xlKjN9JmujcCzN5qmF/YBSbxY8FsTPObA1ZRqp0weCq0AK5QpAywBc1n4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771848661; c=relaxed/simple; bh=wsal5UlA7n4GfHF3W/xllNhFzDs6+1ZPRAdhpx6QuzY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=T1gL0GhJHERx3tZmriOGMDE47FPaOiK1B90dj3CPY4PtfQqaEqAx8Cv0gOnSd4YOByJOu/z97ltg5ltvPhjaLLPzi3OI0gdL7nO4vpkWmw2LDEqC0NNu9dqIbYtPqYbmiPXW+8xC6mtNMehB+OSUYJy3OP1n1UkdP1kGXorVD84= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=SWiXymF8; 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="SWiXymF8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6BBCFC116C6; Mon, 23 Feb 2026 12:11:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1771848661; bh=wsal5UlA7n4GfHF3W/xllNhFzDs6+1ZPRAdhpx6QuzY=; h=From:To:Cc:Subject:Date:From; b=SWiXymF8T/Lp9bMbnDt1gx1J+JAHQUQOh1IUW8T1MGRBjghBVWLcqMkNiNbGXwCrI cEJ4ZMFvqP4nXiRcm/N+Qz9n6LeW5Ebptpf2xRRnwTmv5mPESmCihR2w94NLQW40l5 7uuvvW0YgbjTVIIm2ob8D4RLS1CzxhTADNNRTzYw= From: Greg Kroah-Hartman To: linux-can@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , "Ji-Ze Hong (Peter Hong)" , Marc Kleine-Budde , Vincent Mailhol , stable Subject: [PATCH 1/3] can: usb: f81604: handle short interrupt urb messages properly Date: Mon, 23 Feb 2026 13:10:30 +0100 Message-ID: <2026022331-opal-evaluator-a928@gregkh> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1112; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=wsal5UlA7n4GfHF3W/xllNhFzDs6+1ZPRAdhpx6QuzY=; b=owGbwMvMwCRo6H6F97bub03G02pJDJlznLeznfmZtawm4/ScxjxLmwV8LRUhn4uMQu70LHp7N XVZM/+JjlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZjIutsMC5b1LO7yMdn9YueP tTlpPJ4MVjtF0hjmx/uVzDGV042xXiBj8PdK8wn+jclfAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit If an interrupt urb is recieved that is not the correct length, properly detect it and don't attempt to treat the data as valid. Cc: "Ji-Ze Hong (Peter Hong)" Cc: Marc Kleine-Budde Cc: Vincent Mailhol Cc: stable Assisted-by: gkh_clanker_2000 Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/usb/f81604.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/can/usb/f81604.c b/drivers/net/can/usb/f81604.c index 76578063ac82..c61bd30d1765 100644 --- a/drivers/net/can/usb/f81604.c +++ b/drivers/net/can/usb/f81604.c @@ -620,6 +620,12 @@ static void f81604_read_int_callback(struct urb *urb) netdev_info(netdev, "%s: Int URB aborted: %pe\n", __func__, ERR_PTR(urb->status)); + if (urb->actual_length < sizeof(*data)) { + netdev_warn(netdev, "%s: short int URB: %u < %zu\n", + __func__, urb->actual_length, sizeof(*data)); + goto resubmit_urb; + } + switch (urb->status) { case 0: /* success */ break; -- 2.53.0