31 lines
1.2 KiB
Diff
31 lines
1.2 KiB
Diff
From 44d7510b31f3e9331a2c6b5518438697404655c6 Mon Sep 17 00:00:00 2001
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From: Kay Sievers <kay@vrfy.org>
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Date: Thu, 10 Oct 2013 01:38:11 +0200
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Subject: [PATCH] do not accept "garbage" from acpi firmware performance data
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(FPDT)
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00000000 46 42 50 54 38 00 00 00 02 00 30 02 00 00 00 00 |FBPT8.....0.....|
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00000010 23 45 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |#E..............|
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00000020 f5 6a 51 00 00 00 00 00 00 00 00 00 00 00 00 00 |.jQ.............|
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00000030 00 00 00 00 00 00 00 00 70 74 61 6c 58 00 00 00 |........ptalX...|
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---
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src/shared/acpi-fpdt.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/src/shared/acpi-fpdt.c b/src/shared/acpi-fpdt.c
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index af58c7c..75648b4 100644
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--- a/src/shared/acpi-fpdt.c
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+++ b/src/shared/acpi-fpdt.c
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@@ -146,6 +146,11 @@ int acpi_get_boot_usec(usec_t *loader_start, usec_t *loader_exit) {
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if (brec.type != ACPI_FPDT_BOOT_REC)
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return -EINVAL;
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+ if (brec.startup_start == 0 || brec.exit_services_exit < brec.startup_start)
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+ return -EINVAL;
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+ if (brec.exit_services_exit > NSEC_PER_HOUR)
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+ return -EINVAL;
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+
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if (loader_start)
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*loader_start = brec.startup_start / 1000;
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if (loader_exit)
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