[IA64] Fix a possible buffer overflow in efi.c

Make sure to save space for the trailing '\0'.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index c485a3b32ba8ba4a31ce380635441ab4e3ff1729..d51c2f214875ebecc4ebda328b77f3b8047ffc17 100644 (file)
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -458,7 +458,7 @@ efi_init (void)
        /* Show what we know for posterity */
        c16 = __va(efi.systab->fw_vendor);
        if (c16) {
-               for (i = 0;i < (int) sizeof(vendor) && *c16; ++i)
+               for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i)
                        vendor[i] = *c16++;
                vendor[i] = '\0';
        }