[PATCH net] octeontx2-pf: fix null RX segment address free

[nshettyj]

From: Geetha sowjanya <gakula@xxxxxxxxxxx>

Avoid freeing RX segment addresses when the segment address is null.
This prevents passing an invalid pointer to aura_freeptr().

Fixes: b1bc8457e9d0 ("octeontx2-pf: Cleanup all receive buffers in SG descriptor")
Signed-off-by: Nitin Shetty J <nshettyj@xxxxxxxxxxx>
Signed-off-by: Geetha sowjanya <gakula@xxxxxxxxxxx>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
index 8d2d607bc92f..a9aefd14ae52 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
@@ -256,9 +256,12 @@ static void otx2_free_rcv_seg(struct otx2_nic *pfvf, struct nix_cqe_rx_s *cqe,
 	while (start < end) {
 		sg = (struct nix_rx_sg_s *)start;
 		seg_addr = &sg->seg_addr;
-		for (seg = 0; seg < sg->segs; seg++, seg_addr++)
+		for (seg = 0; seg < sg->segs; seg++, seg_addr++) {
+			if (unlikely(!*seg_addr))
+				return;
 			pfvf->hw_ops->aura_freeptr(pfvf, qidx,
 						   *seg_addr & ~0x07ULL);
+		}
 		start += sizeof(*sg);
 	}
 }
-- 
2.48.1