Found by Coverity. If virNWFilterHashTablePut, then the 3rd arg @val
must be free'd since it would be leaked.

This also fixes potential problem on the error path where the caller
could assume the virNWFilterHashTablePut was successful when in fact
it failed leading to other issues.

Signed-off-by: John Ferlan <jfer...@redhat.com>
---
 src/nwfilter/nwfilter_gentech_driver.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/nwfilter/nwfilter_gentech_driver.c 
b/src/nwfilter/nwfilter_gentech_driver.c
index 7a3d115ba..500197bae 100644
--- a/src/nwfilter/nwfilter_gentech_driver.c
+++ b/src/nwfilter/nwfilter_gentech_driver.c
@@ -525,9 +525,12 @@ virNWFilterDetermineMissingVarsRec(virNWFilterDefPtr 
filter,
                     }
 
                     varAccess = virBufferContentAndReset(&buf);
-                    virNWFilterHashTablePut(missing_vars, varAccess,
-                                            val);
+                    rc = virNWFilterHashTablePut(missing_vars, varAccess, val);
                     VIR_FREE(varAccess);
+                    if (rc < 0) {
+                        virNWFilterVarValueFree(val);
+                        return -1;
+                    }
                 }
             }
         } else if (inc) {
-- 
2.13.5

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