Index: openssl-1.1.1b/crypto/err/err.c
===================================================================
--- openssl-1.1.1b.orig/crypto/err/err.c	2019-02-26 15:15:30.000000000 +0100
+++ openssl-1.1.1b/crypto/err/err.c	2019-05-21 21:14:31.211536069 +0200
@@ -185,7 +185,7 @@ static ERR_STRING_DATA *int_err_get_item
 
 #ifndef OPENSSL_NO_ERR
 /* A measurement on Linux 2018-11-21 showed about 3.5kib */
-# define SPACE_SYS_STR_REASONS 4 * 1024
+# define SPACE_SYS_STR_REASONS 8 * 1024
 # define NUM_SYS_STR_REASONS 127
 
 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
@@ -225,8 +225,8 @@ static void build_SYS_str_reasons(void)
 
                 str->string = cur;
                 cnt += l;
-                if (cnt > sizeof(strerror_pool))
-                    cnt = sizeof(strerror_pool);
+                if (cnt >= sizeof(strerror_pool))
+                    cnt = sizeof(strerror_pool) - 1;
                 cur += l;
 
                 /*