linux-kernel - [PATCH 2/2] octeontx2-pf: fix bitmap leak

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Message-Id: <20250927071505.915905-3-bo@mboxify.com>
Date: Sat, 27 Sep 2025 15:15:05 +0800
From: Bo Sun <bo@...xify.com>
To: sgoutham@...vell.com,
	gakula@...vell.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bo Sun <bo@...xify.com>,
	stable@...r.kernel.org
Subject: [PATCH 2/2] octeontx2-pf: fix bitmap leak

The bitmap allocated with bitmap_zalloc() in otx2_probe() was not
released in otx2_remove(). Unbinding and rebinding the driver therefore
triggers a kmemleak warning:

    unreferenced object (size 8):
      backtrace:
        bitmap_zalloc
        otx2_probe

Call bitmap_free() in the remove path to fix the leak.

Fixes: efabce290151 ("octeontx2-pf: AF_XDP zero copy receive support")
Cc: stable@...r.kernel.org
Signed-off-by: Bo Sun <bo@...xify.com>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
index 5027fae0aa77..e808995703cf 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
@@ -3542,6 +3542,7 @@ static void otx2_remove(struct pci_dev *pdev)
 	otx2_disable_mbox_intr(pf);
 	otx2_pfaf_mbox_destroy(pf);
 	pci_free_irq_vectors(pf->pdev);
+	bitmap_free(pf->af_xdp_zc_qidx);
 	pci_set_drvdata(pdev, NULL);
 	free_netdev(netdev);
 }