chiark / gitweb /
acpi-fpdt: break on zero or negative length read
authorPavel Holica <conscript89@gmail.com>
Wed, 6 Nov 2013 22:24:16 +0000 (23:24 +0100)
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Thu, 7 Nov 2013 06:23:54 +0000 (01:23 -0500)
https://bugzilla.redhat.com/show_bug.cgi?id=1027478

src/shared/acpi-fpdt.c

index 75648b4..7bae47f 100644 (file)
@@ -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))