git: 11fced21ccea - main - dev/iommu: Include offset in maxaddr check.

The branch main has been updated by dougm:

URL: https://cgit.FreeBSD.org/src/commit/?id=11fced21ccea1b80327d159a4c27046cb1f46952

commit 11fced21ccea1b80327d159a4c27046cb1f46952
Author:     Doug Moore <dougm@FreeBSD.org>
AuthorDate: 2022-04-20 22:24:11 +0000
Commit:     Doug Moore <dougm@FreeBSD.org>
CommitDate: 2022-04-20 22:24:11 +0000

    dev/iommu: Include offset in maxaddr check.
    
    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
---
 sys/dev/iommu/iommu_gas.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/iommu/iommu_gas.c b/sys/dev/iommu/iommu_gas.c
index 043bd0e0f039..c0d4f84a3f1c 100644
--- a/sys/dev/iommu/iommu_gas.c
+++ b/sys/dev/iommu/iommu_gas.c
@@ -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. */