https://git.reactos.org/?p=reactos.git;a=commitdiff;h=c0bf352069bd0c1b0d51da64c48fda70bb3ba92a
commit c0bf352069bd0c1b0d51da64c48fda70bb3ba92a Author: Jérôme Gardou <[email protected]> AuthorDate: Mon Feb 1 18:20:18 2021 +0100 Commit: Jérôme Gardou <[email protected]> CommitDate: Wed Feb 3 09:41:24 2021 +0100 [NTOS:MM] Fix regression of MmCanFileBeTruncated --- ntoskrnl/mm/section.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/ntoskrnl/mm/section.c b/ntoskrnl/mm/section.c index d848e337038..62da435122e 100644 --- a/ntoskrnl/mm/section.c +++ b/ntoskrnl/mm/section.c @@ -4115,7 +4115,7 @@ MmCanFileBeTruncated (IN PSECTION_OBJECT_POINTERS SectionObjectPointer, } MmLockSectionSegment(Segment); - if ((Segment->SectionCount == 1) && (SectionObjectPointer->SharedCacheMap != NULL)) + if ((Segment->SectionCount == 0) || ((Segment->SectionCount == 1) && (SectionObjectPointer->SharedCacheMap != NULL))) { /* If the cache is the only one holding a reference to the segment, then it's fine to resize */ Ret = TRUE; @@ -4124,6 +4124,12 @@ MmCanFileBeTruncated (IN PSECTION_OBJECT_POINTERS SectionObjectPointer, { /* We can't shrink, but we can extend */ Ret = NewFileSize->QuadPart >= Segment->RawLength.QuadPart; +#if DBG + if (!Ret) + { + DPRINT1("Cannot truncate data: New Size %I64d, Segment Size %I64d\n", NewFileSize->QuadPart, Segment->RawLength.QuadPart); + } +#endif } MmUnlockSectionSegment(Segment); MmDereferenceSegment(Segment);
