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=1794063952; b=Hzn6linDNYlYD6yjKPzuFBen4xAsQ2THzl/LzneEM2hrCfVXRb59IGQ58J109EcfUt/3 hOWBvIcAYi/YACTMn5NiIEhRjuVNHcjffClLLuWIiNk7HM9kE6nwSggRQLDWfAd2FUgfo X1mlRDJq1wCwMM84X4nBIYA2ufdP15RWbKqpgtODK+N9PEejOFi7i6Pd749IWE4R9khK6 zU7CxzFHrRxoY+brz70PiZTNSSVWE6crKvYXNVEVKQhvc4IEcPfGBT3XhA3zOrACEVsIC ECq38+gfpf/ukN99armppSRgpI5VvPfxBmefYhXEOzdF/QQrndz4Pcss/uMdwPI2mUw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794063952; 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=b603yQxCQ/f30WiA8NPNuK3A9I8SaU6pwMNV+YCIUa8=; b=jO1uMsr4t1NE/vGmm2f+oadYj3hI93YivEb2Pvir3zpIPkI6YSBijgIt7yi5ZbYuB/0y QGHn1aM7LOMALiKaBHzydIidxXg0UUSKDc6sDVozkR0kIa8DZ6qFNY7IP0AFkVrkjBBlT eSgsWH68eqws8tn+w0yU9CBKRs3rKqXgpnWUvPUw6eJ6sBh5lYS0lLMbOSlcxtzRK5TLE 6GTXXLD1jpFfz8Bm2t8QJwERllVpht0Tq3tEO5rYKjo6RlnNxR0KsYwAZA9DkagqFhXdp RdCDQGwOx20658KR+JUF4GkKLpLijAF/OO5nuWVoLGUzL6kpldSqYchxeTw1Pa7BJpA== 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=p5VkEyWc; 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 833C1606D829; Sat, 7 Nov 2026 15:05:52 +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=p5VkEyWc Received: by smtp.kernel.org (Postfix) with ESMTPSA id 171311F008A1; Sat, 7 Nov 2026 15:05:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794063952; bh=b603yQxCQ/f30WiA8NPNuK3A9I8SaU6pwMNV+YCIUa8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=p5VkEyWcKazgCQzdUL1RlOvG4bVAAui73qQrldspG+ptHbwfrQXkUt4BsC1sgmh2K Z9bK4x8FnG02qrUJF1PyNlNvsLWRL5i+iG6hwVrz3J8LK6tuHfLHRBV3at3zaETAJv CDg2QFoQCyoMZqEl6Q2ANv8aa4VFw1zEeljr12oU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable@kernel.org, syzbot+ddccc0c0dbc0a38ffccb@syzkaller.appspotmail.com, Juan Perdomo , Hans Verkuil , Sasha Levin Subject: [PATCH 7.3 0143/1257] media: cx231xx: preserve I2C transfer length Date: Sat, 7 Nov 2026 08:40:39 -0500 Message-ID: <20261107134943.260086116@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: Juan Perdomo [ Upstream commit a19c9502a69bbd42c18816b09cbefdeb4cb68066 ] The I2C core stores message lengths in u16, but cx231xx truncates them to u8 when populating cx231xx_i2c_xfer_data. A 0x700-byte read therefore becomes a zero-length request. USB treats zero-length control transfers as OUT regardless of bRequestType, so the IN control pipe trips the usb_submit_urb() direction warning. Use u16 for buf_size, matching both i2c_msg.len and VENDOR_REQUEST_IN.wLength. Oversized transfers then reach the existing URB_MAX_CTRL_SIZE check and return -EINVAL. Fixes: e0d3bafd0258 ("V4L/DVB (10954): Add cx231xx USB driver") Cc: stable@kernel.org Reported-by: syzbot+ddccc0c0dbc0a38ffccb@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=ddccc0c0dbc0a38ffccb Tested-by: syzbot+ddccc0c0dbc0a38ffccb@syzkaller.appspotmail.com Signed-off-by: Juan Perdomo Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/media/usb/cx231xx/cx231xx.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/usb/cx231xx/cx231xx.h b/drivers/media/usb/cx231xx/cx231xx.h index 19f5036a78d7f..f85d054fbb5cf 100644 --- a/drivers/media/usb/cx231xx/cx231xx.h +++ b/drivers/media/usb/cx231xx/cx231xx.h @@ -463,7 +463,7 @@ struct cx231xx_i2c_xfer_data { u8 direction; /* 1 - IN, 0 - OUT */ u8 saddr_len; /* sub address len */ u16 saddr_dat; /* sub addr data */ - u8 buf_size; /* buffer size */ + u16 buf_size; /* buffer size */ u8 *p_buffer; /* pointer to the buffer */ }; -- 2.53.0