From: Ian Jackson <Ian.Jackson@eu.citrix.com>
Date: Tue, 11 Jan 2011 19:28:22 +0000 (+0000)
Subject: libxl: config parser: do not segfault in some error paths
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~10935
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libxl: config parser: do not segfault in some error paths

In error paths, xlu__cfg_set_free can be called on NULL.
So check for that rather than segfaulting.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---

diff --git a/tools/libxl/libxlu_cfg.c b/tools/libxl/libxlu_cfg.c
index 864a723009..1ade7eacda 100644
--- a/tools/libxl/libxlu_cfg.c
+++ b/tools/libxl/libxlu_cfg.c
@@ -93,6 +93,7 @@ int xlu_cfg_readdata(XLU_Config *cfg, const char *data, int length) {
 void xlu__cfg_set_free(XLU_ConfigSetting *set) {
     int i;
 
+    if (!set) return;
     free(set->name);
     for (i=0; i<set->nvalues; i++)
         free(set->values[i]);