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do not accept "garbage" from acpi firmware performance data (FPDT)

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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...|
This commit is contained in:
Kay Sievers 2013-10-10 01:38:11 +02:00
parent 8552b17660
commit 6c7980093c
Notes: Zbigniew Jędrzejewski-Szmek 2013-10-21 16:09:29 -04:00 
Backport: bugfix
1 changed files with 5 additions and 0 deletions
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5
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) {
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)