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[RTL] Allow RtlGetNextRange to be called on a finished iterator. CORE-6372

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Fixes crash in kmtest:RtlRangeList.
This commit is contained in:
Thomas Faber 2020-08-16 16:18:25 +02:00
parent 9900089fa6
commit 2fb2f1e4c5
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1 changed files with 10 additions and 0 deletions
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10
sdk/lib/rtl/rangelist.c
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@ -499,6 +499,12 @@ RtlGetNextRange(IN OUT PRTL_RANGE_LIST_ITERATOR Iterator,
if (Iterator->Stamp != RangeList->Stamp) if (Iterator->Stamp != RangeList->Stamp)
return STATUS_INVALID_PARAMETER; return STATUS_INVALID_PARAMETER;
if (Iterator->Current == NULL)
{
*Range = NULL;
return STATUS_NO_MORE_ENTRIES;
}
if (MoveForwards) if (MoveForwards)
{ {
Next = ((PRTL_RANGE_ENTRY)Iterator->Current)->Entry.Flink; Next = ((PRTL_RANGE_ENTRY)Iterator->Current)->Entry.Flink;
@ -509,7 +515,11 @@ RtlGetNextRange(IN OUT PRTL_RANGE_LIST_ITERATOR Iterator,
} }
if (Next == Iterator->RangeListHead) if (Next == Iterator->RangeListHead)
{
Iterator->Current = NULL;
*Range = NULL;
return STATUS_NO_MORE_ENTRIES; return STATUS_NO_MORE_ENTRIES;
}
Iterator->Current = Next; Iterator->Current = Next;
*Range = &((PRTL_RANGE_ENTRY)Next)->Range; *Range = &((PRTL_RANGE_ENTRY)Next)->Range;