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| 1 | +From 284dbac43da752ee34825c8b3f6f9e8281cb5a19 Mon Sep 17 00:00:00 2001 |
| 2 | +From: Shanmugavel Pakkirisamy <shanmugavelx.pakkirisamy@intel.com> |
| 3 | +Date: Mon, 6 May 2024 17:53:09 +0800 |
| 4 | +Subject: [PATCH] MdeModulePkg: Potential UINT32 overflow in S3 ResumeCount |
| 5 | + |
| 6 | +REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4677 |
| 7 | + |
| 8 | +Attacker able to modify physical memory and ResumeCount. |
| 9 | +System will crash/DoS when ResumeCount reaches its MAX_UINT32. |
| 10 | + |
| 11 | +Cc: Zhiguang Liu <zhiguang.liu@intel.com> |
| 12 | +Cc: Dandan Bi <dandan.bi@intel.com> |
| 13 | +Cc: Liming Gao <gaoliming@byosoft.com.cn> |
| 14 | + |
| 15 | +Signed-off-by: Pakkirisamy ShanmugavelX <shanmugavelx.pakkirisamy@intel.com> |
| 16 | +Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn> |
| 17 | +--- |
| 18 | + .../FirmwarePerformancePei.c | 12 ++++++++---- |
| 19 | + 1 file changed, 8 insertions(+), 4 deletions(-) |
| 20 | + |
| 21 | +diff --git a/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c b/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c |
| 22 | +index 2f2b2a80b25b..2ba9215226d5 100644 |
| 23 | +--- a/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c |
| 24 | ++++ b/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c |
| 25 | +@@ -112,11 +112,15 @@ FpdtStatusCodeListenerPei ( |
| 26 | + // |
| 27 | + S3ResumeTotal = MultU64x32 (AcpiS3ResumeRecord->AverageResume, AcpiS3ResumeRecord->ResumeCount); |
| 28 | + AcpiS3ResumeRecord->ResumeCount++; |
| 29 | +- AcpiS3ResumeRecord->AverageResume = DivU64x32 (S3ResumeTotal + AcpiS3ResumeRecord->FullResume, AcpiS3ResumeRecord->ResumeCount); |
| 30 | ++ if (AcpiS3ResumeRecord->ResumeCount > 0) { |
| 31 | ++ AcpiS3ResumeRecord->AverageResume = DivU64x32 (S3ResumeTotal + AcpiS3ResumeRecord->FullResume, AcpiS3ResumeRecord->ResumeCount); |
| 32 | ++ DEBUG ((DEBUG_INFO, "\nFPDT: S3 Resume Performance - AverageResume = 0x%x\n", AcpiS3ResumeRecord->AverageResume)); |
| 33 | ++ } else { |
| 34 | ++ DEBUG ((DEBUG_ERROR, "\nFPDT: S3 ResumeCount reaches the MAX_UINT32 value. S3 ResumeCount record reset to Zero.")); |
| 35 | ++ } |
| 36 | + |
| 37 | +- DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - ResumeCount = %d\n", AcpiS3ResumeRecord->ResumeCount)); |
| 38 | +- DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - FullResume = %ld\n", AcpiS3ResumeRecord->FullResume)); |
| 39 | +- DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - AverageResume = %ld\n", AcpiS3ResumeRecord->AverageResume)); |
| 40 | ++ DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - ResumeCount = 0x%x\n", AcpiS3ResumeRecord->ResumeCount)); |
| 41 | ++ DEBUG ((DEBUG_INFO, "FPDT: S3 Resume Performance - FullResume = 0x%x\n", AcpiS3ResumeRecord->FullResume)); |
| 42 | + |
| 43 | + // |
| 44 | + // Update S3 Suspend Performance Record. |
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