xc_pm: Fix off-by-one error in string array access.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>

diff --git a/tools/libxc/xc_pm.c b/tools/libxc/xc_pm.c
index 6edb1a210f7f8feee6d333339efa1cfe8e0def53..3b2f314ca20fd5c4826b1dbff5a8221c414f717c 100644 (file)
--- a/tools/libxc/xc_pm.c
+++ b/tools/libxc/xc_pm.c
@@ -285,7 +285,7 @@ int xc_set_cpufreq_gov(int xc_handle, int cpuid, char *govname)
     sysctl.u.pm_op.cmd = SET_CPUFREQ_GOV;
     sysctl.u.pm_op.cpuid = cpuid;
     strncpy(scaling_governor, govname, CPUFREQ_NAME_LEN);
-    scaling_governor[CPUFREQ_NAME_LEN] = '\0';
+    scaling_governor[CPUFREQ_NAME_LEN - 1] = '\0';
 
     return xc_sysctl(xc_handle, &sysctl);
 }