diff mbox series

[V3,05/13] net: smc911x: Fix potential memleak() in init fail path

Message ID 20200325153648.99993-6-marek.vasut+renesas@gmail.com
State Superseded
Headers show
Series net: smc911x: Convert to DM | expand

Commit Message

Marek Vasut March 25, 2020, 3:36 p.m. UTC
Fix memleak in the init fail path, where if allocation or registration
of MDIO bus fails, then ethernet interface is not unregistered and the
private data are not freed, yet the probe function reports a failure.

Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
Cc: Joe Hershberger <joe.hershberger at ni.com>
Cc: Masahiro Yamada <yamada.masahiro at socionext.com>
---
V2: No change
V3: No change
---
 drivers/net/smc911x.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index ceb4f81215..4459da5945 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -282,15 +282,23 @@  int smc911x_initialize(u8 dev_num, int base_addr)
 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 	int retval;
 	struct mii_dev *mdiodev = mdio_alloc();
-	if (!mdiodev)
+	if (!mdiodev) {
+		eth_unregister(dev);
+		free(dev);
 		return -ENOMEM;
+	}
+
 	strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
 	mdiodev->read = smc911x_miiphy_read;
 	mdiodev->write = smc911x_miiphy_write;
 
 	retval = mdio_register(mdiodev);
-	if (retval < 0)
+	if (retval < 0) {
+		mdio_free(mdiodev);
+		eth_unregister(dev);
+		free(dev);
 		return retval;
+	}
 #endif
 
 	return 1;