linux-kernel - [PATCH net 1/1] octeontx2-af: CGX: fix bitmap leaks

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Message-Id: <20251020143112.357819-2-bo@mboxify.com>
Date: Mon, 20 Oct 2025 22:31:12 +0800
From: Bo Sun <bo@...xify.com>
To: kuba@...nel.org,
	pabeni@...hat.com
Cc: sgoutham@...vell.com,
	lcherian@...vell.com,
	gakula@...vell.com,
	jerinj@...vell.com,
	hkelam@...vell.com,
	sbhatta@...vell.com,
	andrew+netdev@...n.ch,
	davem@...emloft.net,
	edumazet@...gle.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bo Sun <bo@...xify.com>,
	stable@...r.kernel.org
Subject: [PATCH net 1/1] octeontx2-af: CGX: fix bitmap leaks

The RX/TX flow-control bitmaps (rx_fc_pfvf_bmap and tx_fc_pfvf_bmap)
are allocated by cgx_lmac_init() but never freed in cgx_lmac_exit().
Unbinding and rebinding the driver therefore triggers kmemleak:

    unreferenced object (size 16):
        backtrace:
          rvu_alloc_bitmap
          cgx_probe

Free both bitmaps during teardown.

Fixes: e740003874ed ("octeontx2-af: Flow control resource management")
Cc: stable@...r.kernel.org
Signed-off-by: Bo Sun <bo@...xify.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/cgx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
index ec0e11c77cbf..f56e6782c4de 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
@@ -1823,6 +1823,8 @@ static int cgx_lmac_exit(struct cgx *cgx)
 		cgx->mac_ops->mac_pause_frm_config(cgx, lmac->lmac_id, false);
 		cgx_configure_interrupt(cgx, lmac, lmac->lmac_id, true);
 		kfree(lmac->mac_to_index_bmap.bmap);
+		kfree(lmac->rx_fc_pfvf_bmap.bmap);
+		kfree(lmac->tx_fc_pfvf_bmap.bmap);
 		kfree(lmac->name);
 		kfree(lmac);
 	}