Sometimes ZwCreateFile returned C0000022

NTDEV
1

Hi,

The following is my code. Sometimes it works OK, but sometimes ZwCreateFile failed with
status code 0xC0000022(STATUS_ACCESS_DENIED) returned.

ntStatus = ZwCreateFile(&hFileHandle,
SYNCHRONIZE|GENERIC_READ,
&objAttributes,
&isbCreateReadStatus,
NULL,
0,
FILE_SHARE_READ|FILE_SHARE_WRITE,
FILE_OPEN,
FILE_SYNCHRONOUS_IO_NONALERT|FILE_NON_DIRECTORY_FILE,
NULL,
0);

I don’t know what’s the problem.

Thanks.

ZM Chen

2

That looks correct. Are you opening a file on a network? And the obvious
question… are any other applications opening the file for any purpose?

Zm Chen wrote:

Hi,

The following is my code. Sometimes it works OK, but sometimes ZwCreateFile failed with
status code 0xC0000022(STATUS_ACCESS_DENIED) returned.

ntStatus = ZwCreateFile(&hFileHandle,
SYNCHRONIZE|GENERIC_READ,
&objAttributes,
&isbCreateReadStatus,
NULL,
0,
FILE_SHARE_READ|FILE_SHARE_WRITE,
FILE_OPEN,
FILE_SYNCHRONOUS_IO_NONALERT|FILE_NON_DIRECTORY_FILE,
NULL,
0);

I don’t know what’s the problem.

Thanks.

ZM Chen

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–

  • Nick Ryan (MVP for DDK)
3

ZwCreateFile is called at boot time in my driver.

ZM Chen

4

Ooops. This API isn’t available for use in DriverEntry if your driver is
loading at SERVICE_BOOT_START.

Zm Chen wrote:

ZwCreateFile is called at boot time in my driver.

ZM Chen

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To unsubscribe send a blank email to xxxxx@lists.osr.com

–

  • Nick Ryan (MVP for DDK)