From: Dr. David von Oheimb <dev@ddvo.net>
Date: Mon, 14 Apr 2025 09:59:00 +0000 (+0200)
Subject: asn_mime.c multi_split(): add missing I/O error checking
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1a8cc7fab0fe8d7f7d4d03a39a23fbb994924443;p=thirdparty%2Fopenssl.git

asn_mime.c multi_split(): add missing I/O error checking

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/27368)
---

diff --git a/crypto/asn1/asn_mime.c b/crypto/asn1/asn_mime.c
index 8c99b6ba3dc..fab66d791bd 100644
--- a/crypto/asn1/asn_mime.c
+++ b/crypto/asn1/asn_mime.c
@@ -692,14 +692,17 @@ static int multi_split(BIO *bio, int flags, const char *bound, STACK_OF(BIO) **r
 #else
                     1
 #endif
-                        || (flags & SMIME_CRLFEOL) != 0)
-                    BIO_write(bpart, "\r\n", 2);
-                else
-                    BIO_write(bpart, "\n", 1);
+                        || (flags & SMIME_CRLFEOL) != 0) {
+                    if (BIO_puts(bpart, "\r\n") < 0)
+                        return 0;
+                } else {
+                    if (BIO_puts(bpart, "\n") < 0)
+                        return 0;
+                }
             }
             eol = next_eol;
-            if (len > 0)
-                BIO_write(bpart, linebuf, len);
+            if (len > 0 && BIO_write(bpart, linebuf, len) != len)
+                return 0;
         }
     }
     BIO_free(bpart);