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dev/iommu: Include offset in maxaddr check.

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If iommu_gas_match_one has to adjust for a boundary crossing, its
check against maxaddr includes 'offset' in its calculation, to ensure
that the allocated memory does not exceed the max address. However, if
there's no boundary crossing adjustment, then the maxaddr check
disregards 'offset'. Fix that.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D34978
This commit is contained in:
Doug Moore 2022-04-20 17:24:11 -05:00
parent 1a7f22d9c2
commit 11fced21cc
1 changed files with 1 additions and 1 deletions
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2
sys/dev/iommu/iommu_gas.c
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@ -305,7 +305,7 @@ iommu_gas_match_one(struct iommu_gas_match_args *a, iommu_gaddr_t beg,
a->entry->start = roundup2(beg + IOMMU_PAGE_SIZE,
a->common->alignment);
if (a->entry->start + a->size > maxaddr)
if (a->entry->start + a->offset + a->size > maxaddr)
return (false);
/* IOMMU_PAGE_SIZE to create gap after new entry. */