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The call in ProbeMediaStatus() to the ReadDisk() function of the EFI_DISK_IO_PROTOCOL interface implemented in DiskIoDxe/DiskIo.c crashed in DiskIo2ReadWriteDisk() because of the NULL value of the destination buffer pointer. Pass the address of a buffer in the stack instead of a NULL pointer. In addition to avoiding the crash, that way, the media probe does not depend anymore on the way the EFI_DISK_IO_PROTOCOL implementation deals with a NULL value of the destination buffer pointer as the UEFI specification does not specify the expected behaviour. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ronald Cron <Ronald.Cron@arm.com> Reviewed-by: Olivier Martin <olivier.martin@arm.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17859 6f19259b-4bc3-4df7-8a09-765794883524