Allow short reads in asn1_d2i_read_bio()

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/22486)

diff --git a/crypto/asn1/a_d2i_fp.c b/crypto/asn1/a_d2i_fp.c
index 4af2276a8d02f12e27235602a058d290df2872eb..f36c769b1842ca1315cd6b1d6fa5043e65590a37 100644 (file)
--- a/crypto/asn1/a_d2i_fp.c
+++ b/crypto/asn1/a_d2i_fp.c
@@ -148,6 +148,9 @@ int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
                     goto err;
                 }
                 len += i;
+                if ((size_t)i < want)
+                    continue;
+
             }
         }
         /* else data already loaded */