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efi_loader: notification with TPL_APPLICATION not allowed
The UEFI specification requires event notification levels to be > TPL_APPLICATION and <= TPL_HIGH_LEVEL. With the patch the CreateEvent() and CreatedEventEx() services are changed to check that the notification level is not TPL_APPLICATION. Reference: UEFI Specification 2.8 Errata B, table 27 "TPL Restrictions", "Event Notification Levels" Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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1 changed files with 8 additions and 1 deletions
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@ -687,8 +687,15 @@ efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
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return EFI_INVALID_PARAMETER;
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}
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/*
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* The UEFI specification requires event notification levels to be
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* > TPL_APPLICATION and <= TPL_HIGH_LEVEL.
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*
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* Parameter NotifyTpl should not be checked if it is not used.
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*/
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if ((type & (EVT_NOTIFY_WAIT | EVT_NOTIFY_SIGNAL)) &&
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(!notify_function || is_valid_tpl(notify_tpl) != EFI_SUCCESS))
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(!notify_function || is_valid_tpl(notify_tpl) != EFI_SUCCESS ||
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notify_tpl == TPL_APPLICATION))
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return EFI_INVALID_PARAMETER;
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ret = efi_allocate_pool(pool_type, sizeof(struct efi_event),
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