35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
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From 54ae30cea7731b9949b7e503401f732f1e95e930 Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Wed, 26 Apr 2023 14:38:34 +0200
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Subject: [PATCH 15/16] SecurityPkg: add TIS sanity check (tpm12)
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The code blindly assumes a TIS interface is present in case both CRB and
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FIFO checks fail. Check the InterfaceType for TIS instead and only
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return PtpInterfaceTis in case it matches, PtpInterfaceMax otherwise.
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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---
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SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c b/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c
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index 51f43591287a..d2b79a274084 100644
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--- a/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c
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+++ b/SecurityPkg/Library/Tpm12DeviceLibDTpm/Tpm12Tis.c
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@@ -91,7 +91,11 @@ Tpm12GetPtpInterface (
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return PtpInterfaceFifo;
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}
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- return PtpInterfaceTis;
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+ if (InterfaceId.Bits.InterfaceType == PTP_INTERFACE_IDENTIFIER_INTERFACE_TYPE_TIS) {
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+ return PtpInterfaceTis;
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+ }
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+
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+ return PtpInterfaceMax;
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}
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/**
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--
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2.40.0
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