[PATCH AUTOSEL 6.1 36/42] staging: vme_user: added bound check to geoid

Sasha Levin
2024-10-04T18:28:25Z

From: Riyan Dhiman <riyandhiman14@gmail.com>

[ Upstream commit a8a8b54350229f59c8ba6496fb5689a1632a59be ]

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@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/20240827125604.42771-2-riyandhiman14@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/staging/vme_user/vme_fake.c | 6 ++++++
drivers/staging/vme_user/vme_tsi148.c | 6 ++++++
2 files changed, 12 insertions(+)

diff --git a/drivers/staging/vme_user/vme_fake.c b/drivers/staging/vme_user/vme_fake.c
index 1ee432c223e2b..0c4d60aa00ab2 100644
--- a/drivers/staging/vme_user/vme_fake.c
+++ b/drivers/staging/vme_user/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/staging/vme_user/vme_tsi148.c b/drivers/staging/vme_user/vme_tsi148.c
index 0171f46d1848f..0e649c8b259d1 100644
--- a/drivers/staging/vme_user/vme_tsi148.c
+++ b/drivers/staging/vme_user/vme_tsi148.c
@@ -2261,6 +2261,12 @@ 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