[base64] fix crash due to broken force_assert

if the input to `li_to_base64_no_padding` has length 3*n, `out_tuple_remainder` = `in_tuple_remainder` = 0, and `4*full_tuples == 4*full_tuples + out_tuple_remainder` From: Andrey Mnatsakanov <andrey.mnatsakanov@gmail.com> git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.x@3117 152afb58-edef-0310-8abb-c4023f1b3aa9
6 years ago · 7b983ae054
2 changed files with 2 additions and 1 deletions
--- a/1
+++ b/1
@ -44,6 +44,7 @@ NEWS
  * consistent inclusion of config.h at top of files (fixes #2073)
  * [core] add generic vector implementation
  * [core] replace array weakref with vector
+  * [base64] fix crash due to broken force_assert

 - 1.4.39 - 2016-01-02
  * [core] fix memset_s call (fixes #2698)
--- a/src/base64.c
+++ b/src/base64.c
@ -144,7 +144,7 @@ size_t li_to_base64_no_padding(char* out, size_t out_length, const unsigned char
 	/* check overflows */
 	force_assert(full_tuples < 2*full_tuples);
 	force_assert(full_tuples < 4*full_tuples);
-	force_assert(4*full_tuples < 4*full_tuples + out_tuple_remainder);
+	force_assert(4*full_tuples <= 4*full_tuples + out_tuple_remainder);
 	force_assert(require_space <= out_length);

 	for (i = 2; i < in_length; i += 3) {