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[UDFS] Fix accessing an already freed pointer in UDFMarkAllocatedAsNotXXX()

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CORE-11182
This commit is contained in:
Victor Martinez 2019-08-17 16:30:21 +03:00 committed by Victor Perevertkin
parent 4805f0cd73
commit b64865fbdf
1 changed files with 6 additions and 3 deletions
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9
drivers/filesystems/udfs/udf_info/extent.cpp
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@ -2158,6 +2158,7 @@ UDFMarkAllocatedAsNotXXX(
Extent[i].extLocation = 0;
Extent[i].extLength = (Extent[i].extLength & UDF_EXTENT_LENGTH_MASK) | flags;
NewExtent = Extent;
Extent = NULL;
AdPrint(("Alloc->Not (1) NewExtent = Extent = %x\n", NewExtent));
} else
if(l < BOffs) {
@ -2211,15 +2212,17 @@ UDFMarkAllocatedAsNotXXX(
if(Deallocate)
UDFMarkSpaceAsXXX(Vcb, (-1), TmpExtInf.Mapping, AS_DISCARDED); // mark as free
ExtInfo->Modified = TRUE;
ExtInfo->Mapping = NewExtent;
AdPrint(("Alloc->Not: ExtInfo %x, Extent %x\n", ExtInfo, ExtInfo->Mapping));
if(Extent) {
AdPrint(("Alloc->Not kill %x\n", Extent));
MyFreePool__(Extent);
} else {
AdPrint(("Alloc->Not keep %x\n", Extent));
}
ExtInfo->Modified = TRUE;
ExtInfo->Mapping = NewExtent;
AdPrint(("Alloc->Not: ExtInfo %x, Extent %x\n", ExtInfo, ExtInfo->Mapping));
return STATUS_SUCCESS;
} // end UDFMarkAllocatedAsNotXXX()