linux-kernel - [PATCH 3.12 024/155] IB/core: Avoid leakage from kernel to user space

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Message-Id: <755524689790d7f95ec5581c98c24ff62218685b.1428411003.git.jslaby@suse.cz>
Date:	Tue,  7 Apr 2015 14:49:53 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Eli Cohen <eli@....mellanox.co.il>,
	Eli Cohen <eli@...lanox.com>,
	Roland Dreier <roland@...estorage.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 024/155] IB/core: Avoid leakage from kernel to user space

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

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

===============

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: Jiri Slaby <jslaby@...e.cz>
---
 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 2df31f68ea09..849c9dc7d1f6 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -473,6 +473,7 @@ 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);
-- 
2.3.4

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