linux-kernel - [PATCH 4.0 062/148] RDMA/core: Fix for parsing netlink string attribute

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Date:	Wed,  3 Jun 2015 21:08:52 +0900
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Tatyana Nikolova <tatyana.e.nikolova@...el.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Doug Ledford <dledford@...hat.com>
Subject: [PATCH 4.0 062/148] RDMA/core: Fix for parsing netlink string attribute

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

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

From: Tatyana Nikolova <Tatyana.E.Nikolova@...el.com>

commit ec04847c0c5b471bab2dacceadfdb803a9d1a2ea upstream.

The string iwpm_ulib_name is recorded in a nlmsg as a netlink attribute.
Without this fix parsing of the nlmsg by the userspace port mapper service fails
because of unknown attribute length, causing the port mapper service not to
register the client, which has sent the nlmsg.

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@...el.com>
Reviewed-By: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/infiniband/core/iwpm_msg.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/core/iwpm_msg.c
+++ b/drivers/infiniband/core/iwpm_msg.c
@@ -33,7 +33,7 @@
 
 #include "iwpm_util.h"
 
-static const char iwpm_ulib_name[] = "iWarpPortMapperUser";
+static const char iwpm_ulib_name[IWPM_ULIBNAME_SIZE] = "iWarpPortMapperUser";
 static int iwpm_ulib_version = 3;
 static int iwpm_user_pid = IWPM_PID_UNDEFINED;
 static atomic_t echo_nlmsg_seq;


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