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-rw-r--r--ssl/statem/extensions_cust.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/ssl/statem/extensions_cust.c b/ssl/statem/extensions_cust.c
index 3188adea0c..6de59e2425 100644
--- a/ssl/statem/extensions_cust.c
+++ b/ssl/statem/extensions_cust.c
@@ -64,6 +64,9 @@ static int custom_ext_parse_old_cb_wrap(SSL *s, unsigned int ext_type,
custom_ext_parse_cb_wrap *parse_cb_wrap =
(custom_ext_parse_cb_wrap *)parse_arg;
+ if (parse_cb_wrap->parse_cb == NULL)
+ return 1;
+
return parse_cb_wrap->parse_cb(s, ext_type, in, inlen, al,
parse_cb_wrap->parse_arg);
}