patch-0001-tools-libxc-fix-strncpy-size.patch

From 7a2b2cd991d079c9bee317c8590239e184cedd05 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
 <marmarek@invisiblethingslab.com>
Date: Wed, 4 Apr 2018 21:29:19 +0200
Subject: [PATCH] tools/libxc: fix strncpy size
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Organization: Invisible Things Lab
Cc: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>

gcc-8 warns about possible truncation of trailing '\0'.
Final character is overridden by '\0' anyway, so don't bother to copy
it.

This fixes compile failure:

    xc_pm.c: In function 'xc_set_cpufreq_gov':
    xc_pm.c:308:5: error: 'strncpy' specified bound 16 equals destination size [-Werror=stringop-truncation]
         strncpy(scaling_governor, govname, CPUFREQ_NAME_LEN);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    cc1: all warnings being treated as errors

Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
---
 tools/libxc/xc_pm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/libxc/xc_pm.c b/tools/libxc/xc_pm.c
index 67e2418e3f..6f8d548e44 100644
--- a/tools/libxc/xc_pm.c
+++ b/tools/libxc/xc_pm.c
@@ -305,7 +305,7 @@ int xc_set_cpufreq_gov(xc_interface *xch, int cpuid, char *govname)
     sysctl.cmd = XEN_SYSCTL_pm_op;
     sysctl.u.pm_op.cmd = SET_CPUFREQ_GOV;
     sysctl.u.pm_op.cpuid = cpuid;
-    strncpy(scaling_governor, govname, CPUFREQ_NAME_LEN);
+    strncpy(scaling_governor, govname, CPUFREQ_NAME_LEN - 1);
     scaling_governor[CPUFREQ_NAME_LEN - 1] = '\0';
 
     return xc_sysctl(xch, &sysctl);
-- 
2.13.6