4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kamal Heib <kamalheib1@xxxxxxxxx>
[ Upstream commit 85e1d42663a0c163002961d2685be952067b0dc2 ]
Fix memory leak in error path of mtk_add_mac() by make sure to free
the allocated netdev.
Fixes: e3cbf478f846 ('staging: mt7621-eth: add the drivers core files')
Signed-off-by: Kamal Heib <kamalheib1@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/mt7621-eth/mtk_eth_soc.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
--- a/drivers/staging/mt7621-eth/mtk_eth_soc.c
+++ b/drivers/staging/mt7621-eth/mtk_eth_soc.c
@@ -2012,8 +2012,10 @@ static int mtk_add_mac(struct mtk_eth *e
mac->hw_stats = devm_kzalloc(eth->dev,
sizeof(*mac->hw_stats),
GFP_KERNEL);
- if (!mac->hw_stats)
- return -ENOMEM;
+ if (!mac->hw_stats) {
+ err = -ENOMEM;
+ goto free_netdev;
+ }
spin_lock_init(&mac->hw_stats->stats_lock);
mac->hw_stats->reg_offset = id * MTK_STAT_OFFSET;
}
@@ -2037,7 +2039,8 @@ static int mtk_add_mac(struct mtk_eth *e
err = register_netdev(eth->netdev[id]);
if (err) {
dev_err(eth->dev, "error bringing up device\n");
- return err;
+ err = -ENOMEM;
+ goto free_netdev;
}
eth->netdev[id]->irq = eth->irq;
netif_info(eth, probe, eth->netdev[id],
@@ -2045,6 +2048,10 @@ static int mtk_add_mac(struct mtk_eth *e
eth->netdev[id]->base_addr, eth->netdev[id]->irq);
return 0;
+
+free_netdev:
+ free_netdev(eth->netdev[id]);
+ return err;
}
static int mtk_probe(struct platform_device *pdev)
