linux-kernel - [ 40/48] IB/core: Avoid leakage from kernel to user space

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Date:	Fri, 15 May 2015 10:06:10 +0200
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Eli Cohen <eli@...lanox.com>, Yann Droneaud <ydroneaud@...eya.com>,
	Roland Dreier <roland@...estorage.com>,
	Ben Hutchings <ben@...adent.org.uk>, Willy Tarreau <w@....eu>
Subject: [ 40/48] IB/core: Avoid leakage from kernel to user space

2.6.32-longterm 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: Ben Hutchings <ben@...adent.org.uk>
Cc: Yann Droneaud <ydroneaud@...eya.com>
(cherry picked from commit 852acc0151014ba9731e2f5f2f3df3b6a8960d40)
Signed-off-by: Willy Tarreau <w@....eu>
---
 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 aec0fbd..8da0037 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -433,6 +433,7 @@ 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);
-- 
1.7.12.2.21.g234cd45.dirty



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