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

Message ID 1429630329-21748-78-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques April 21, 2015, 3:31 p.m. UTC 
3.16.7-ckt10 -stable review patch.  If anyone has any objections, please let me know.

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

From: Eli Cohen <eli@dev.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@mellanox.com>
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/infiniband/core/uverbs_main.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

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);