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@vger.kernel.org
Signed-off-by: Bo Sun <bo@mboxify.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 42044cd810b1..fd4792e432bf 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);
+		rvu_free_bitmap(&lmac->rx_fc_pfvf_bmap);
+		rvu_free_bitmap(&lmac->tx_fc_pfvf_bmap);
 		kfree(lmac->name);
 		kfree(lmac);
 	}

On 06/02/2026 13:09, Bo Sun wrote:
> 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@vger.kernel.org
> Signed-off-by: Bo Sun <bo@mboxify.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 42044cd810b1..fd4792e432bf 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);
> +		rvu_free_bitmap(&lmac->rx_fc_pfvf_bmap);
> +		rvu_free_bitmap(&lmac->tx_fc_pfvf_bmap);
>   		kfree(lmac->name);
>   		kfree(lmac);
>   	}

Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>