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[MOUNTMGR] Fix QueryPointsFromMemory and make it working

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Select the current stack location for output buffer
And set output size so that buffer gets properly copied to caller
This commit is contained in:
Pierre Schweitzer
2019-09-05 08:28:56 +02:00
parent 70d29ec423
commit d592e00dfa
1 changed files with 2 additions and 1 deletions
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3
drivers/filters/mountmgr/point.c
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@@ -332,12 +332,13 @@ QueryPointsFromMemory(IN PDEVICE_EXTENSION DeviceExtension,
}
/* Now, ensure output buffer can hold everything */
Stack = IoGetNextIrpStackLocation(Irp);
Stack = IoGetCurrentIrpStackLocation(Irp);
MountPoints = (PMOUNTMGR_MOUNT_POINTS)Irp->AssociatedIrp.SystemBuffer;
/* Ensure we set output to let user reallocate! */
MountPoints->Size = sizeof(MOUNTMGR_MOUNT_POINTS) + TotalSize;
MountPoints->NumberOfMountPoints = TotalSymLinks;
Irp->IoStatus.Information = sizeof(MOUNTMGR_MOUNT_POINTS) + TotalSize;
if (MountPoints->Size > Stack->Parameters.DeviceIoControl.OutputBufferLength)
{