Hello all,
I got the dump of boot sector in the
IRP_MN_START_DEVICE.
In the IRP_MJ_READ, the problem was that it belonging
to the storage stack, was being called sometimes at an
IRQL above PASSIVE_LEVEL.And ZwXX routines work at
PASSIVE_LEVEL.
Thus, on shifting the code to start device routine
solved the problem.
Thank you everybody for the help.
Cheers and Regards
V.S.
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