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iommu/mediatek-v1: add missing larb count sanity check

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Add the missing larb count sanity check to avoid writing beyond a fixed
sized array in case of a malformed devicetree.

Acked-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Johan Hovold
2025-10-20 06:53:14 +02:00
committed by Joerg Roedel
parent 46207625c9
commit ab31cf041e
1 changed files with 3 additions and 0 deletions
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3
drivers/iommu/mtk_iommu_v1.c
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@@ -646,6 +646,9 @@ static int mtk_iommu_v1_probe(struct platform_device *pdev)
if (larb_nr < 0)
return larb_nr;
if (larb_nr > MTK_LARB_NR_MAX)
return -EINVAL;
for (i = 0; i < larb_nr; i++) {
struct device_node *larbnode;
struct platform_device *plarbdev;