vty: Fix a memory leak in the vty description command

Before assigning a new string, free the previous one. This
assume that it was allocated with talloc which should be true
for the osmocom users.

diff --git a/src/vty/logging_vty.c b/src/vty/logging_vty.c
index 4cab22a..b037a5b 100644 (file)
--- a/src/vty/logging_vty.c
+++ b/src/vty/logging_vty.c
@@ -269,6 +269,8 @@ gDEFUN(cfg_description, cfg_description_cmd,
                return CMD_WARNING;
        }
 
+       if (*dptr)
+               talloc_free(*dptr);
        *dptr = argv_concat(argv, argc, 0);
        if (!dptr)
                return CMD_WARNING;