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

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

From: Dennis Dalessandro <dennis.dalessan...@intel.com>


[ Upstream commit 8935780b9f7bbad0f2eb5dd43f61ba7b509a1575 ]

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.hi...@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessan...@intel.com>
Signed-off-by: Jason Gunthorpe <j...@mellanox.com>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/infiniband/hw/hfi1/rc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/hfi1/rc.c
+++ b/drivers/infiniband/hw/hfi1/rc.c
@@ -815,7 +815,7 @@ static inline void hfi1_make_rc_ack_16B(
        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;


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