If BIO_snprintf failed, keep trying.

Thanks to Graeme Perrow for reporting and providing a possible fix.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2565)

diff --git a/crypto/bio/bio_cb.c b/crypto/bio/bio_cb.c
index d3e860686c3c5821c27e40af5db95760d398039a..f96294bb430475186b089efc48b1280a54db335d 100644 (file)
--- a/crypto/bio/bio_cb.c
+++ b/crypto/bio/bio_cb.c
@@ -78,6 +78,9 @@ long MS_CALLBACK BIO_debug_callback(BIO *bio, int cmd, const char *argp,
 
     len = BIO_snprintf(buf,sizeof buf,"BIO[%p]: ",(void *)bio);
 
+    /* Ignore errors and continue printing the other information. */
+    if (len < 0)
+        len = 0;
     p = buf + len;
     p_maxlen = sizeof(buf) - len;