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59 lines
1.9 KiB
59 lines
1.9 KiB
3 months ago
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From 8b78800fed2a4af7c08eebd20d1bf764e8e10c84 Mon Sep 17 00:00:00 2001
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From: Jon Maloy <jmaloy@redhat.com>
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Date: Tue, 25 Jun 2024 22:28:58 -0400
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Subject: [PATCH 10/31] SecurityPkg/RngDxe: Add debug warning for NULL
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PcdCpuRngSupportedAlgorithm
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RH-Author: Jon Maloy <jmaloy@redhat.com>
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RH-MergeRequest: 77: UINT32 overflow in S3 ResumeCount and Pixiefail fixes
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RH-Jira: RHEL-21854 RHEL-21856 RHEL-40099
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RH-Acked-by: Gerd Hoffmann <None>
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RH-Commit: [10/31] 66b888e9b1e2be0c79784e02b4821854bd80432d
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JIRA: https://issues.redhat.com/browse/RHEL-21856
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CVE: CVE-2022-45237
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Upstream: Merged
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commit 6cdddccf0085cf2929f8ae710515e4e53663dfb2
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Author: Pierre Gondois <pierre.gondois@arm.com>
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Date: Fri Oct 28 17:32:56 2022 +0200
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SecurityPkg/RngDxe: Add debug warning for NULL PcdCpuRngSupportedAlgorithm
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PcdCpuRngSupportedAlgorithm should allow to identify the the algorithm
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used by the RNDR CPU instruction to generate a random number.
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Add a debug warning if the Pcd is not set.
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Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
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Acked-by: Jiewen Yao <jiewen.yao@intel.com>
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Signed-off-by: Jon Maloy <jmaloy@redhat.com>
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---
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.../RandomNumberGenerator/RngDxe/AArch64/RngDxe.c | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/SecurityPkg/RandomNumberGenerator/RngDxe/AArch64/RngDxe.c b/SecurityPkg/RandomNumberGenerator/RngDxe/AArch64/RngDxe.c
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index c0b0d28d48..a800a85792 100644
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--- a/SecurityPkg/RandomNumberGenerator/RngDxe/AArch64/RngDxe.c
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+++ b/SecurityPkg/RandomNumberGenerator/RngDxe/AArch64/RngDxe.c
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@@ -67,6 +67,16 @@ GetAvailableAlgorithms (
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sizeof (EFI_RNG_ALGORITHM)
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);
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mAvailableAlgoArrayCount++;
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+
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+ DEBUG_CODE_BEGIN ();
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+ if (IsZeroGuid (PcdGetPtr (PcdCpuRngSupportedAlgorithm))) {
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+ DEBUG ((
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+ DEBUG_WARN,
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+ "PcdCpuRngSupportedAlgorithm should be a non-zero GUID\n"
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+ ));
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+ }
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+
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+ DEBUG_CODE_END ();
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}
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// Raw algorithm (Trng)
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--
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2.39.3
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