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authorKay Sievers <kay@vrfy.org>2013-10-10 01:38:11 +0200
committerKay Sievers <kay@vrfy.org>2013-10-10 01:38:11 +0200
commit6c7980093c4e39d07bf06484f96f489e236c7c29 (patch)
tree4b5cfc5ec451582ec136cb09834b61dad7f47c67 /src/shared
parent8552b17660033812080a11533bd0edce74401039 (diff)
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...|
Diffstat (limited to 'src/shared')
-rw-r--r--src/shared/acpi-fpdt.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/shared/acpi-fpdt.c b/src/shared/acpi-fpdt.c
index af58c7cca6..75648b4d86 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)