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From 6c7980093c4e39d07bf06484f96f489e236c7c29 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay@vrfy.org>
Date: Thu, 10 Oct 2013 01:38:11 +0200
Subject: [PATCH] do not accept "garbage" from acpi firmware performance data
(FPDT)
00000000 46 42 50 54 38 00 00 00 02 00 30 02 00 00 00 00 |FBPT8.....0.....|
00000010 23 45 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |#E..............|
00000020 f5 6a 51 00 00 00 00 00 00 00 00 00 00 00 00 00 |.jQ.............|
00000030 00 00 00 00 00 00 00 00 70 74 61 6c 58 00 00 00 |........ptalX...|
---
src/shared/acpi-fpdt.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/shared/acpi-fpdt.c b/src/shared/acpi-fpdt.c
index af58c7c..75648b4 100644
--- a/src/shared/acpi-fpdt.c
+++ b/src/shared/acpi-fpdt.c
@@ -146,6 +146,11 @@ int acpi_get_boot_usec(usec_t *loader_start, usec_t *loader_exit) {
if (brec.type != ACPI_FPDT_BOOT_REC)
return -EINVAL;
+ if (brec.startup_start == 0 || brec.exit_services_exit < brec.startup_start)
+ return -EINVAL;
+ if (brec.exit_services_exit > NSEC_PER_HOUR)
+ return -EINVAL;
+
if (loader_start)
*loader_start = brec.startup_start / 1000;
if (loader_exit)
--
1.8.5.4
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