kconfig: sym_expand_string_value: allow for string termination when reallocing
When expanding a parameterised string we may run out of space, this
triggers a realloc. When computing the new allocation size we do not
allow for the terminating '\0'. Allow for this when calculating the new
length.
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index c0efe10..af6e9f3 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -875,7 +875,7 @@
symval = sym_get_string_value(sym);
}
- newlen = strlen(res) + strlen(symval) + strlen(src);
+ newlen = strlen(res) + strlen(symval) + strlen(src) + 1;
if (newlen > reslen) {
reslen = newlen;
res = realloc(res, reslen);