linux-kernel - [PATCH] staging: vme_user: added bound check to geoid

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Message-ID: <20240827055555.65371-1-riyandhiman14@gmail.com>
Date: Tue, 27 Aug 2024 11:25:55 +0530
From: Riyan Dhiman <riyandhiman14@...il.com>
To: gregkh@...uxfoundation.org
Cc: linux-kernel@...r.kernel.org,
	linux-staging@...ts.linux.dev,
	Riyan Dhiman <riyandhiman14@...il.com>
Subject: [PATCH] staging: vme_user: added bound check to geoid

Added bound check for geoid in probe function because geoid will
always be positive and less than VME_MAX_SLOTS

Signed-off-by: Riyan Dhiman <riyandhiman14@...il.com>
---
 drivers/staging/vme_user/vme_fake.c   | 7 +++++++
 drivers/staging/vme_user/vme_tsi148.c | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/staging/vme_user/vme_fake.c b/drivers/staging/vme_user/vme_fake.c
index 7f84d1c86f29..d93a5d428ab9 100644
--- a/drivers/staging/vme_user/vme_fake.c
+++ b/drivers/staging/vme_user/vme_fake.c
@@ -1059,6 +1059,13 @@ static int __init fake_init(void)
 	struct vme_slave_resource *slave_image;
 	struct vme_lm_resource *lm;
 
+	/* If geoid provided, validate it is positive and less than VME_MAX_SLOTS */
+	if ((geoid) && (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");
 	if (IS_ERR(vme_root))
diff --git a/drivers/staging/vme_user/vme_tsi148.c b/drivers/staging/vme_user/vme_tsi148.c
index d81be8e4ceba..97323b5563e8 100644
--- a/drivers/staging/vme_user/vme_tsi148.c
+++ b/drivers/staging/vme_user/vme_tsi148.c
@@ -2252,6 +2252,13 @@ 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 provided, validate it is positive and less than VME_MAX_SLOTS */
+	if ((geoid) && (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;
+	}
+
 	/* If we want to support more than one of each bridge, we need to
 	 * dynamically generate this so we get one per device
 	 */
-- 
2.46.0