kconfig: Don't leak 'source' filenames during parsing

[carl9170fw.git] / config / symbol.c

diff --git a/config/symbol.c b/config/symbol.c
index 35e0937aa6a6fd3b47f15974f6df121c41c55488..55c95e0bb48a546c7fddd5fae42d9f7855ad840b 100644 (file)
--- a/config/symbol.c
+++ b/config/symbol.c
@@ -907,6 +907,10 @@ const char *sym_expand_string_value(const char *in)
        char *res;
        size_t reslen;
 
+       /*
+        * Note: 'in' might come from a token that's about to be
+        * freed, so make sure to always allocate a new string
+        */
        reslen = strlen(in) + 1;
        res = xmalloc(reslen);
        res[0] = '\0';