[PATCH 5.10/5.15] staging: vme_user: added bound check to geoid

[Mikhail Dmitrichenko]

From: Riyan Dhiman <riyandhiman14@xxxxxxxxx>

commit a8a8b54350229f59c8ba6496fb5689a1632a59be upstream.

The geoid is a module parameter that allows users to hardcode the slot number.
A bound check for geoid was added in the probe function because only values
between 0 and less than VME_MAX_SLOT are valid.

Signed-off-by: Riyan Dhiman <riyandhiman14@xxxxxxxxx>
Reviewed-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240827125604.42771-2-riyandhiman14@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
[mdmitrichenko: Apply the checks in drivers/vme/bridges/, where
 the bridge drivers reside in 5.10 and 5.15.]
Signed-off-by: Mikhail Dmitrichenko <mdmitrichenko@xxxxxxxxxxxxx>
---
 drivers/vme/bridges/vme_fake.c   | 6 ++++++
 drivers/vme/bridges/vme_tsi148.c | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/vme/bridges/vme_fake.c b/drivers/vme/bridges/vme_fake.c
index eae78366eb028..03469b1bdffb2 100644
--- a/drivers/vme/bridges/vme_fake.c
+++ b/drivers/vme/bridges/vme_fake.c
@@ -1071,6 +1071,12 @@ static int __init fake_init(void)
 	struct vme_slave_resource *slave_image;
 	struct vme_lm_resource *lm;
 
+	if (geoid < 0 || geoid >= VME_MAX_SLOTS) {
+		pr_err("VME geographical address must be between 0 and %d (exclusive), but got %d\n",
+			VME_MAX_SLOTS, geoid);
+		return -EINVAL;
+	}
+
 	/* We need a fake parent device */
 	vme_root = __root_device_register("vme", THIS_MODULE);
 	if (IS_ERR(vme_root))
diff --git a/drivers/vme/bridges/vme_tsi148.c b/drivers/vme/bridges/vme_tsi148.c
index 5ccda1a363ecc..ee005ea0a6a92 100644
--- a/drivers/vme/bridges/vme_tsi148.c
+++ b/drivers/vme/bridges/vme_tsi148.c
@@ -2285,6 +2285,12 @@ static int tsi148_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	struct vme_dma_resource *dma_ctrlr;
 	struct vme_lm_resource *lm;
 
+	if (geoid < 0 || geoid >= VME_MAX_SLOTS) {
+		dev_err(&pdev->dev, "VME geographical address must be between 0 and %d (exclusive), but got %d\n",
+			VME_MAX_SLOTS, geoid);
+		return -EINVAL;
+	}
+
 	/* If we want to support more than one of each bridge, we need to
 	 * dynamically generate this so we get one per device
 	 */
-- 
2.43.0