linux-kernel - [PATCH 3.16.y-ckt 077/144] IB/core: Avoid leakage from kernel to user space

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Message-Id: <1429630329-21748-78-git-send-email-luis.henriques@canonical.com>
Date:	Tue, 21 Apr 2015 16:31:02 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Eli Cohen <eli@...lanox.com>,
	Roland Dreier <roland@...estorage.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 077/144] IB/core: Avoid leakage from kernel to user space

3.16.7-ckt10 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eli Cohen <eli@....mellanox.co.il>

commit 377b513485fd885dea1083a9a5430df65b35e048 upstream.

Clear the reserved field of struct ib_uverbs_async_event_desc which is
copied to user space.

Signed-off-by: Eli Cohen <eli@...lanox.com>
Reviewed-by: Yann Droneaud <ydroneaud@...eya.com>
Signed-off-by: Roland Dreier <roland@...estorage.com>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/infiniband/core/uverbs_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 08219fb3338b..7a515c867674 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -476,6 +476,7 @@ static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
 
 	entry->desc.async.element    = element;
 	entry->desc.async.event_type = event;
+	entry->desc.async.reserved   = 0;
 	entry->counter               = counter;
 
 	list_add_tail(&entry->list, &file->async_file->event_list);
--
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