From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 25 Jul 2013 17:04:09 +0000
Subject: [patch] RDMA/cxgb3: stack info leak in iwch_craete_cq()
Message-Id: <20130725170409.GB7026@elgon.mountain>
List-Id: <kernel-janitors.vger.kernel.org>
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To: Steve Wise <swise-ut6Up61K2wZBDgjK7y7TUQ@public.gmane.org>
Cc: Roland Dreier <roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, Hal Rosenstock <hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kernel-janitors-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

The "uresp.reserved" field isn't initialized.  It's at the end, of the
struct here so we don't need to copy it to the user.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c
index e87f220..b8e26f2 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
@@ -226,7 +226,7 @@ static struct ib_cq *iwch_create_cq(struct ib_device *ibdev, int entries, int ve
 			mm->len = PAGE_ALIGN(((1UL << uresp.size_log2) + 1) *
 					     sizeof(struct t3_cqe));
 			uresp.memsize = mm->len;
-			resplen = sizeof uresp;
+			resplen = sizeof uresp - sizeof uresp.reserved;
 		}
 		if (ib_copy_to_udata(udata, &uresp, resplen)) {
 			kfree(mm);