From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (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 E39F237F759 for ; Wed, 22 Apr 2026 19:26:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776886020; cv=none; b=L4W+PEuhTVK3BwKNG/9v6dUaYlHMStNz7SXgSGXv5DDhfmeav/uhLnllNoKqfdHNDKEmXYj7bmNJPGhEIG/e7TEvzTBUdiqvpw58CUyDmumFHm9whWqBH0piRfxSAm+p8gA3yitBsXsFWmprMPglLLp1M/cxSXAmj/ZZGgjJW20= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776886020; c=relaxed/simple; bh=Cprsstibdn9hXiJNjjZMMGCndcSykhi/5ewadyB1c7I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lFruG4ar1+dYHDJBmzIL31ieOOufvQ1vrtD0s8rxGyOiFzHzmKZDw2/mh9eJ4q7wnbvHxg/Wy4T+1J/Cj2B+frGblsz4i2f4Ln/tIltpROsTQvA6AirWvFXcC9LilKqVQIN2Im2XRbmi1gjanznGRXkUOcsVOsvCi6ScPAB0Ssk= 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=rMWeIei/; arc=none smtp.client-ip=209.85.128.54 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="rMWeIei/" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-488b0046078so52859725e9.1 for ; Wed, 22 Apr 2026 12:26:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1776886014; x=1777490814; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=U6uDdzl1S+Uv4+b9FyCrrZfU5BEzOjiHUJyKHJY/818=; b=rMWeIei/Svzuh7UZjSvZL/eFPX1AKaJXG3D0ZBKLsXbsfPU1VxtpfwblIh6463gpIK WP+OJwtUDNBQBihPbWQV3JpL7tf2VEQ0XGE/Zw1ESi+NJnQtwpdMLF4J2E0mNdnmIfgV aaPTi9E0cnQKrQKJelEpbzKQJZbaRzS0fuWHH+2O++X1k6y6U2AE3LCK+orJBg0ONp1r n/K1m1LszZG16NUyxjEObxkDRKJnS9VnsQ/PRwCTy7zdW5kmorOihI6wrZ29r2qnqGJN 04gH2AkxO2ceNJ/ArNxa1yMLNPW2XA2x7iqudjSE0b2wlL3BMhvG9YJuSXcgqqT5E+r4 h6NQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776886014; x=1777490814; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=U6uDdzl1S+Uv4+b9FyCrrZfU5BEzOjiHUJyKHJY/818=; b=tYUgllLsYZHU/hFhK2kdZsZUAz+hNBMy8XAfxs8CZOEodEWsEDM14y5ACp9YrJHMvV WY/kGrDJA5+94w85y+6uaqN/da78Rnds7ylBXV2aOe9Urct+PSusJ61nl389ZqLQP4fm HQDadvC8K0aDNaDZ0X46sI0WfIRGS2Zy926Dga7x/2Mdudn0gNKF12e8UKTO5E4aDAvT wyJt4TVJKYmJneHBPg6awU3k+KVif338fM4vuIyhgF5uIAJZPEMsRt+PPxjg0ekupcH9 DYXrsVA7FY17aJ0Duj7Nh1Hh6lX3lrKaNEfwr7BfOZS+fScQOH90M8O0dLggvVA+Jxe8 e/Tg== X-Gm-Message-State: AOJu0YzFVavoSoYxmBXauCA17JhRZ+gusnTde919st5HJC8vSSQh7//e W4zfM90lVXQRcP0jt5mG7yaUy+uonIdscm/QVgon8yv9n4+zt6FUZcFL8R2dSUg= X-Gm-Gg: AeBDietH+SmehiQ8dNt6P+J/DP02EflfEPOI5SfzYPDaR25FazJrX9SBqbFcL/bm7Is J279epa3Z5CXXdW1Zfw/e6/i6hRoUqgTGQuGD21cc8gJPaDYkkz1uuEwBWACfkqMvW90kgRgH3y JTwV5y2ek2h5gEhNFN/aF0L9Z0cVB+BAmOxzYdQQ+AmXft8etSUPnciD60hoJ+gkD0guf+OTKXy 6W2rOIj54HNiVLpOrUyalr/A7ml5KuerPgQW2KuKq+jGjYw7Kofhtcz4TMLkI0t9/ueO+O1rjfG 5WGyEAYpdWg3YhbxEsyrB3GyPuL2S2KY6PH2FniKo0YZ/2I46mlxBaXNbNMeVxdIxWy0mXEjGhc zbaUja90H7tPHilOhfHeN8ICA+FHufC+PtWJtM8SjQ/24SsKfPQRwojGNrbczixEcAuRJHejufY HBf2NGrzpJ0PGdDWi30SJybPpivEfvBJLBIS6Dd2AlRyZaQ8hGGG+N1RSKrcybGvyyyB4GNzu6O d6bcH/Xn2ToN7Xl9YULydA6Ucn0Nluh/QDu1l8oAaA3EZTibPpaZ+Co3rR2ABZMh/BYR9x9Xco= X-Received: by 2002:a05:600c:5299:b0:48a:5342:36b5 with SMTP id 5b1f17b1804b1-48a54514646mr139907495e9.21.1776886013330; Wed, 22 Apr 2026 12:26:53 -0700 (PDT) Received: from archtop.localdomain (92-242-248-17.broadband.mtnet.hr. [92.242.248.17]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43fe4cb1365sm50429463f8f.7.2026.04.22.12.26.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Apr 2026 12:26:53 -0700 (PDT) From: Jakov Novak To: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Mauro Carvalho Chehab , Antti Palosaari , Shuah Khan , Jakov Novak , syzbot+427909a2e3b2f83d78cb@syzkaller.appspotmail.com Subject: [PATCH 1/1] media: dvb-usb-v2: ce6230: fix bug when sending usb_control_msg of size 0 Date: Wed, 22 Apr 2026 21:26:44 +0200 Message-ID: <20260422192644.21814-2-jakovnovak30@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260422192644.21814-1-jakovnovak30@gmail.com> References: <20260422192644.21814-1-jakovnovak30@gmail.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The function ce6230_ctrl_msg, didn't check the size of the message that was supposed to be read/written, which in turn caused the error 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. Fixes: eebb876b0b8f ("V4L/DVB (11216): Add driver for Intel CE6230 DVB-T USB2.0") Reported-and-tested-by: syzbot+427909a2e3b2f83d78cb@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=427909a2e3b2f83d78cb 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..dd3aa45b56a3 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: -- 2.53.0