From: Dennis Dalessandro <dennis.dalessandro@intel.com>
Date: Tue, 14 Nov 2017 12:34:23 +0000 (-0800)
Subject: IB/hfi1: Initialize bth1 in 16B rc ack builder
X-Git-Tag: v4.19~1837^2~40
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8935780b9f7bbad0f2eb5dd43f61ba7b509a1575;p=platform%2Fkernel%2Flinux-rpi.git

IB/hfi1: Initialize bth1 in 16B rc ack builder

It is possible the bth1 variable could be used uninitialized so going
ahead and giving it a default value.

Otherwise we leak stack memory to the network.

Fixes: 5b6cabb0db77 ("IB/hfi1: Add 16B RC/UC support")
Reviewed-by: Don Hiatt <don.hiatt@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
---

diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c
index fd01a76..af5f793 100644
--- a/drivers/infiniband/hw/hfi1/rc.c
+++ b/drivers/infiniband/hw/hfi1/rc.c
@@ -814,7 +814,7 @@ static inline void hfi1_make_rc_ack_16B(struct rvt_qp *qp,
 	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
 	struct hfi1_16b_header *hdr = &opa_hdr->opah;
 	struct ib_other_headers *ohdr;
-	u32 bth0, bth1;
+	u32 bth0, bth1 = 0;
 	u16 len, pkey;
 	u8 becn = !!is_fecn;
 	u8 l4 = OPA_16B_L4_IB_LOCAL;