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Bug Check 0x4A: IRQL_GT_ZERO_AT_SYSTEM_SERVICE

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The IRQL_GT_ZERO_AT_SYSTEM_SERVICE bug check has a value of 0x0000004A. This indicates that a thread is returning to user mode from a system call when its IRQL is still above PASSIVE_LEVEL.

Important

This article is for programmers. If you're a customer who has received a blue screen error code while using your computer, see Troubleshoot blue screen errors.

IRQL_GT_ZERO_AT_SYSTEM_SERVICE Parameters

Parameter Description

1

The address of the system function (system call routine)

2

The current IRQL

3

0

4

0

Resolution

The !analyze debug extension displays information about the bug check and can be helpful in determining the root cause.