linux-kernel - [PATCH 3.14 10/43] IB/core: Avoid leakage from kernel to user space

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Message-Id: <20150417132556.441271526@linuxfoundation.org>
Date:	Fri, 17 Apr 2015 15:28:44 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Eli Cohen <eli@...lanox.com>,
	Yann Droneaud <ydroneaud@...eya.com>,
	Roland Dreier <roland@...estorage.com>
Subject: [PATCH 3.14 10/43] IB/core: Avoid leakage from kernel to user space

3.14-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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/infiniband/core/uverbs_main.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -476,6 +476,7 @@ static void ib_uverbs_async_handler(stru
 
 	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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