[PATCH 5.10 459/459] octeontx2-pf: Fix otx2_get_fecparam()

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

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

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

commit 38b5133ad607ecdcc8d24906d1ac9cc8df41acd5 upstream.

Static checkers complained about an off by one read overflow in
otx2_get_fecparam() and we applied two conflicting fixes for it.

Correct: b0aae0bde26f ("octeontx2: Fix condition.")
  Wrong: 93efb0c65683 ("octeontx2-pf: Fix out-of-bounds read in otx2_get_fecparam()")

Revert the incorrect fix.

Fixes: 93efb0c65683 ("octeontx2-pf: Fix out-of-bounds read in otx2_get_fecparam()")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
@@ -805,7 +805,7 @@ static int otx2_get_fecparam(struct net_
 		if (!rsp->fwdata.supported_fec)
 			fecparam->fec = ETHTOOL_FEC_NONE;
 		else
-			fecparam->fec = fec[rsp->fwdata.supported_fec - 1];
+			fecparam->fec = fec[rsp->fwdata.supported_fec];
 	}
 	return 0;
 }






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