x86: Do not print unbounded bogus FACS signature.

Signed-off-by: Keir Fraser <keir@xensource.com>

diff --git a/xen/arch/x86/acpi/boot.c b/xen/arch/x86/acpi/boot.c
index 85aa49414f9c083b6942f392cbc1be5413092a58..228adb494242bcb9a06fb3fe6a580e1fe8cb147c 100644 (file)
--- a/xen/arch/x86/acpi/boot.c
+++ b/xen/arch/x86/acpi/boot.c
@@ -423,7 +423,7 @@ acpi_fadt_parse_sleep_info(struct fadt_descriptor_rev2 *fadt)
                goto bad;
 
        if (strncmp(facs->signature, "FACS", 4)) {
-               printk(KERN_ERR PREFIX "Invalid FACS signature %s\n",
+               printk(KERN_ERR PREFIX "Invalid FACS signature %.4s\n",
                        facs->signature);
                goto bad;
        }