Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Rui Miguel Silva <rui.silva@linaro.org>,
        Johan Hovold <johan@kernel.org>,
        Rui Miguel Silva <rmfrfs@gmail.com>
Subject: [PATCH 4.14 04/42] staging: greybus: power_supply: fix prop-descriptor request size
Date:   Thu,  9 May 2019 20:41:53 +0200
Message-Id: <20190509181253.319397217@linuxfoundation.org>
In-Reply-To: <20190509181252.616018683@linuxfoundation.org>
References: <20190509181252.616018683@linuxfoundation.org>
User-Agent: quilt/0.66
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Johan Hovold <johan@kernel.org>

commit 47830c1127ef166af787caf2f871f23089610a7f upstream.

Since moving the message buffers off the stack, the dynamically
allocated get-prop-descriptor request buffer is incorrectly sized due to
using the pointer rather than request-struct size when creating the
operation.

Fortunately, the pointer size is always larger than this one-byte
request, but this could still cause trouble on the remote end due to the
unexpected message size.

Fixes: 9d15134d067e ("greybus: power_supply: rework get descriptors")
Cc: stable <stable@vger.kernel.org>     # 4.9
Cc: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/staging/greybus/power_supply.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/greybus/power_supply.c
+++ b/drivers/staging/greybus/power_supply.c
@@ -521,7 +521,7 @@ static int gb_power_supply_prop_descript
 
 	op = gb_operation_create(connection,
 				 GB_POWER_SUPPLY_TYPE_GET_PROP_DESCRIPTORS,
-				 sizeof(req), sizeof(*resp) + props_count *
+				 sizeof(*req), sizeof(*resp) + props_count *
 				 sizeof(struct gb_power_supply_props_desc),
 				 GFP_KERNEL);
 	if (!op)