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net: ethernet: stmicro: stmmac: fix possible memory leak in __stmmac_open 

Fix a possible memory leak in __stmmac_open when stmmac_init_phy fails.
It's also needed to free everything allocated by stmmac_setup_dma_desc
and not just the dma_conf struct.

Drop free_dma_desc_resources from __stmmac_open and correctly call
free_dma_desc_resources on each user of __stmmac_open on error.

Reported-by: Jose Abreu <Jose.Abreu@synopsys.com>
Fixes: ba39b344e9 ("net: ethernet: stmicro: stmmac: generate stmmac dma conf before open")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Cc: stable@vger.kernel.org
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Jose Abreu <Jose.Abreu@synopsys.com>
Link: https://lore.kernel.org/r/20230614091714.15912-1-ansuelsmth@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Christian Marangi 2023-06-14 11:17:14 +02:00 committed by Jakub Kicinski
parent 44194cb1b6
commit 30134b7c47
1 changed files with 7 additions and 2 deletions
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9
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -3873,7 +3873,6 @@ irq_error:
stmmac_hw_teardown(dev);
init_error:
free_dma_desc_resources(priv, &priv->dma_conf);
phylink_disconnect_phy(priv->phylink);
init_phy_error:
pm_runtime_put(priv->device);
@ -3891,6 +3890,9 @@ static int stmmac_open(struct net_device *dev)
return PTR_ERR(dma_conf);
ret = __stmmac_open(dev, dma_conf);
if (ret)
free_dma_desc_resources(priv, dma_conf);
kfree(dma_conf);
return ret;
}
@ -5633,12 +5635,15 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu)
stmmac_release(dev);
ret = __stmmac_open(dev, dma_conf);
kfree(dma_conf);
if (ret) {
free_dma_desc_resources(priv, dma_conf);
kfree(dma_conf);
netdev_err(priv->dev, "failed reopening the interface after MTU change\n");
return ret;
}
kfree(dma_conf);
stmmac_set_rx_mode(dev);
}