From 44d7510b31f3e9331a2c6b5518438697404655c6 Mon Sep 17 00:00:00 2001 From: Kay Sievers 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) -- 1.8.4.652.g0d6e0ce