iommu/msm: Limit the per-master Machine ID list

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The OF translation path appends each unique stream ID from an IOMMU
specifier to the fixed mids array in the per-master object. It currently
has no capacity check before storing at mids[num_mids] and incrementing
num_mids.

Return -ENOSPC when the array is full rather than writing the next ID
beyond it.

Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Will Deacon <will@kernel.org>

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Pengpeng Hou 2026-07-22 12:16:19 +08:00 • committed by Will Deacon

parent b0d50c9016

commit 649e5ef836

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drivers/iommu/msm_iommu.c

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