[PATCH v2 2/3] EDAC/versalnet: Fix device name memory leak

[Prasanna Kumar T S M <ptsm@linux.microsoft.com>]

The device name allocated via kzalloc() in init_one_mc() is assigned to
dev->init_name but never freed on the normal removal path.
device_register() copies init_name and then sets dev->init_name to NULL,
so the name pointer becomes unreachable from the device. Thus leaking
memory.

Use a stack-local char array instead of using kzalloc() for name.

Fixes: d5fe2fec6c40 ("EDAC: Add a driver for the AMD Versal NET DDR controller")
Cc: stable@vger.kernel.org
Signed-off-by: Prasanna Kumar T S M <ptsm@linux.microsoft.com>
---
 drivers/edac/versalnet_edac.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/edac/versalnet_edac.c b/drivers/edac/versalnet_edac.c
index acd51b492772..012c4f40994d 100644
--- a/drivers/edac/versalnet_edac.c
+++ b/drivers/edac/versalnet_edac.c
@@ -779,7 +779,7 @@ static int init_one_mc(struct mc_priv *priv, struct platform_device *pdev, int i
 	struct mem_ctl_info *mci;
 	struct device *dev;
 	enum dev_type dt;
-	char *name;
+	char name[MC_NAME_LEN];
 	int rc;
 
 	config = priv->adec[CONF + i * ADEC_NUM];
@@ -813,13 +813,9 @@ static int init_one_mc(struct mc_priv *priv, struct platform_device *pdev, int i
 	layers[1].is_virt_csrow = false;
 
 	rc = -ENOMEM;
-	name = kzalloc(MC_NAME_LEN, GFP_KERNEL);
-	if (!name)
-		return rc;
-
 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 	if (!dev)
-		goto err_name_free;
+		return rc;
 
 	mci = edac_mc_alloc(i, ARRAY_SIZE(layers), layers, sizeof(struct mc_priv));
 	if (!mci) {
@@ -858,8 +854,6 @@ static int init_one_mc(struct mc_priv *priv, struct platform_device *pdev, int i
 	edac_mc_free(mci);
 err_dev_free:
 	kfree(dev);
-err_name_free:
-	kfree(name);
 
 	return rc;
 }
-- 
2.49.0