From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f42.google.com (mail-wm1-f42.google.com [209.85.128.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E7A3533F58D for ; Sat, 16 May 2026 11:24:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.42 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778930655; cv=none; b=DCj1PjhuSl6PkWhxQe2/aMQ6QGzsu2bFoAzgo+jb+PYDmMstLrbDihvCpxrZfZlhtcbZbV1RUcPcDRJZbmDb4yV2BeUe1NGd9iXXfuks5o6mXLrSZeYTDMWqOs4lYPwnBkYx9bOfbfAfHQvaNrHIDhBDOcoTeuiBmrcElC0d+UE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778930655; c=relaxed/simple; bh=ImpGRNEHYg+3sPy1LbebP9pUnBnWQsbptRi1PWqW9Ow=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=efzezMGHmXjEWbhB8VoG+r33XnBVp6UfX3ZxgeYDfAAczVN1w0YJn0XFpZyqv2ulvu4c9iUbK/VVKZPvBRVDafMh54wPm/YkFyxzEZ4SnnPnVpjstLkR1WrINEeLhebaC5F27LVU1lZpZa5efy+Z8v5Mr7Miu+8U0j3bW9KFUQA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=VGtoJy9G; arc=none smtp.client-ip=209.85.128.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VGtoJy9G" Received: by mail-wm1-f42.google.com with SMTP id 5b1f17b1804b1-48a3e9862f0so3119895e9.1 for ; Sat, 16 May 2026 04:24:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1778930652; x=1779535452; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=dww/lPRIYAdkQRXiPpybD8LE/hx1CCV39ZTfqjkRArs=; b=VGtoJy9G1KUPRjUVnOM3jOOyzgkDJphafDUUDB12wkfLOqmKLmSP5/uAA+y3UAnSI3 1tgJmm1dLWMJmhP+rxx9qsUY88ggbGUTObPcAZH1qCWi55BOHBouxYSiw7J2J6EipetO 4TxSRxGar8gc+IeKI3+z+tTE6TK5HVtRfr3xGUhZbh+3Cc0F16IL1t5i52IZ0fLiu07l DMcBhIpVQw2JlloIY8Wenwfdq7w792uWR2gD+HwEP3xfj6OMlPUMUODRS/T8LCjl1r/J q/JD8kjREY77EyONdX+zfwV/4PLwwmA+bFgBxETIO5gBCn2CwbQOoWCpYPrzJSaK1NE1 Vblg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778930652; x=1779535452; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=dww/lPRIYAdkQRXiPpybD8LE/hx1CCV39ZTfqjkRArs=; b=s3bpAsakUlcHVj31Bp8shnv+jm85buYobhahtYXNJXYy7itfO4ZPhpEcPQR0sajqli Hd4ZaxwLEabDkVC0nq9rHYVjjPMGF+X74SbH9yFdAU0ybuc/RMX//0rbG0wy49zIlSOO nhvLFwdoEcXeHIiSLF3PoWjxPKROvnBiFTyh9YwhXQYeParv7bHMk/2HTkxW5HsgFUOs kFvfEqeWKVKgY+quY1372gtTMp3dDgyHGNTtnxmlku/45NX7hJ9ru+ebMRMnULgYWrRg 5qkkBxGcGrrtlD3w3MfYjxGZ5rOQKJn/tBMlhtC84iXJwN6SfuTDk1ueJ07j+g9P1zpX wVfw== X-Gm-Message-State: AOJu0YzyjkHXJ4N2Lu7zBP2yLt9Zkp5P0NKeouOxJQQ05+kYHVbM6GV4 JQ6FLVyXQ0cDpihp22vJ874zvmfk6kRUbDeHOWdXGTA/JasFqoRQXn5W3oBaJEjQqA== X-Gm-Gg: Acq92OEAhF03avn+Y7vBiifxK2n8dV+tsoBQwbKNHBm7SR3PW2qXXv8HKu5z/ctdZnw NNSIflFUQu40MUQhz1Bj0z2hQFLKQb7TLeC4o5iWyN+Gh0HRdJH5WbuNVqQq+yQ77bTMsrblQqE DlXPOzjBXdtlVEX86xbnELCL66ZxiUKB6ji9aGVI4RTiioqq2WikLSYp4CDwKGRuJiynrExqV3B 5cIhULE9iJRrdPexmq0Pvon5+tTctwuma4hv5ITzfolMRY/1xZZFvxN2oaUgQEcWDnwzvQcgyLv DqQzCFD4dTlqgRE1ztuJmUxp/G7znYD0Mk9NrCCW1TuG8+O2df3rW8jtieb8OjEMQekHyFaldbd XesI9MoyFrIm++Ggxn4YmHoYGkc3bocUU974D/lzbcRaI5kW2ubrz5ypq1afGOoTgQh8GVRPu1O N92c9Bxucn3/K2uW8dEEj3n/vH0UXzj70yVYHW3CSBFaa9N87NQkT5VI+b/+6mZdGtIjb8ZAvlg yFg1FWyuOVgKSYx2wI5Jw== X-Received: by 2002:a05:600c:4851:b0:48a:79d8:a8d6 with SMTP id 5b1f17b1804b1-48feea99dc7mr43272445e9.7.1778930651852; Sat, 16 May 2026 04:24:11 -0700 (PDT) Received: from archtop.localdomain ([2a01:599:90c:dba3:ce9b:8429:85f7:db09]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48fe4c8d39esm121917315e9.7.2026.05.16.04.24.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 May 2026 04:24:11 -0700 (PDT) From: Jakov Novak To: linux-kernel@vger.kernel.org, jakovnovak30@gmail.com Cc: crope@iki.fi, linux-media@vger.kernel.org, mchehab@kernel.org, skhan@linuxfoundation.org, syzbot+427909a2e3b2f83d78cb@syzkaller.appspotmail.com Subject: [PATCH v3] media: dvb-usb-v2: ce6230: add ctr_msg check usb_control_msg of size 0 Date: Sat, 16 May 2026 13:23:55 +0200 Message-ID: <20260516112355.318-1-jakovnovak30@gmail.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Currently, the function ce6230_ctrl_msg, doesnt't check the size of the control message that is supposed to be read/written, which causes the error Syzbot reported at the usb core function usb_submit_urb after calling usb_control_msg in the driver code. This patch fixes the issue by returning an error code if the req->data_len == 0 inside ce6230_ctrl_msg. Fixes: eebb876b0b8f ("V4L/DVB (11216): Add driver for Intel CE6230 DVB-T USB2.0") Reported-by: syzbot+427909a2e3b2f83d78cb@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=427909a2e3b2f83d78cb Tested-by: syzbot+427909a2e3b2f83d78cb@syzkaller.appspotmail.com Signed-off-by: Jakov Novak --- drivers/media/usb/dvb-usb-v2/ce6230.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/media/usb/dvb-usb-v2/ce6230.c b/drivers/media/usb/dvb-usb-v2/ce6230.c index 7ebaf3ee4491..3152a34777f9 100644 --- a/drivers/media/usb/dvb-usb-v2/ce6230.c +++ b/drivers/media/usb/dvb-usb-v2/ce6230.c @@ -23,6 +23,13 @@ static int ce6230_ctrl_msg(struct dvb_usb_device *d, struct usb_req *req) value = req->value; index = req->index; + if (!req->data_len) { + dev_err(&d->udev->dev, + "%s: cannot send crtl_msg of size 0", + KBUILD_MODNAME); + return -ENOBUFS; + } + switch (req->cmd) { case I2C_READ: case DEMOD_READ: -- 2.54.0