From 98f6a4dfe1d6e601ddd2b59c42e8fc16193d187b Mon Sep 17 00:00:00 2001 From: Pavel Holica Date: Wed, 6 Nov 2013 23:24:16 +0100 Subject: [PATCH] acpi-fpdt: break on zero or negative length read https://bugzilla.redhat.com/show_bug.cgi?id=1027478 --- src/shared/acpi-fpdt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/shared/acpi-fpdt.c b/src/shared/acpi-fpdt.c index 75648b4..7bae47f 100644 --- a/src/shared/acpi-fpdt.c +++ b/src/shared/acpi-fpdt.c @@ -109,6 +109,8 @@ int acpi_get_boot_usec(usec_t *loader_start, usec_t *loader_exit) { for (rec = (struct acpi_fpdt_header *)(buf + sizeof(struct acpi_table_header)); (char *)rec < buf + l; rec = (struct acpi_fpdt_header *)((char *)rec + rec->length)) { + if (rec->length <= 0) + break; if (rec->type != ACPI_FPDT_TYPE_BOOT) continue; if (rec->length != sizeof(struct acpi_fpdt_header))