[PATCH 6.18.y] EDAC/versalnet: Fix device name memory leak

[Sasha Levin <sashal@kernel.org>]

From: Prasanna Kumar T S M <ptsm@linux.microsoft.com>

[ Upstream commit 8cf5dd235eff6008cb04c3d8064d2acfa90616f1 ]

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")
Signed-off-by: Prasanna Kumar T S M <ptsm@linux.microsoft.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260401111856.2342975-1-ptsm@linux.microsoft.com
[ adapted fix from `init_one_mc()` helper to the equivalent loop in `init_versalnet()` using literal `32` instead of `MC_NAME_LEN` ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/edac/versalnet_edac.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/edac/versalnet_edac.c b/drivers/edac/versalnet_edac.c
index f90723bc93d5c..4053ee2e0beef 100644
--- a/drivers/edac/versalnet_edac.c
+++ b/drivers/edac/versalnet_edac.c
@@ -765,9 +765,9 @@ static int init_versalnet(struct mc_priv *priv, struct platform_device *pdev)
 	u32 num_chans, rank, dwidth, config;
 	struct edac_mc_layer layers[2];
 	struct mem_ctl_info *mci;
+	char name[32];
 	struct device *dev;
 	enum dev_type dt;
-	char *name;
 	int rc, i;
 
 	for (i = 0; i < NUM_CONTROLLERS; i++) {
@@ -814,7 +814,6 @@ static int init_versalnet(struct mc_priv *priv, struct platform_device *pdev)
 
 		dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 		dev->release = versal_edac_release;
-		name = kmalloc(32, GFP_KERNEL);
 		sprintf(name, "versal-net-ddrmc5-edac-%d", i);
 		dev->init_name = name;
 		rc = device_register(dev);
-- 
2.53.0