NtSetInformationthread

Hello,

I'm trying to change I/o priority of the current thread but it's not working. The status keeps returning -1073741819 which most likely translates to STATUS_ACCESS_VIOLATION.

The code I am using:

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IO_PRIORITY_HINT priority;
priority = IoPriorityHigh;
NTSTATUS status = NtSetInformationThread(ZwCurrentThread(), ThreadIoPriority, &priority, sizeof(priority));

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Any ideas what could be the reason and how to make this work?

Did you try to do it under the Admin account?

Quote:

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Originally Posted by VictorN

Did you try to do it under the Admin account?

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I am running that driver code from a program with admin rights, so I assume so.

I've tested this code:

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NtSetInformationThread(ZwCurrentThread(), ThreadHideFromDebugger, NULL, 0)

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That works. Anyway the kernel code doesn't even run if I try to run the program without admin rights.