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upstream: Log errors in kex_exchange_identification() with level 

verbose instead of error to reduce preauth log spam. All of those get logged
with a more generic error message by sshpkt_fatal().

feedback from sthen@
ok djm@

OpenBSD-Commit-ID: bd47dab4695b134a44c379f0e9a39eed33047809
This commit is contained in:
tobhe@openbsd.org 2023-08-21 21:16:18 +00:00 committed by Damien Miller
parent 9d7193a835
commit d2d247938b
No known key found for this signature in database
1 changed files with 5 additions and 5 deletions
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10
kex.c
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@ -1,4 +1,4 @@
/* $OpenBSD: kex.c,v 1.179 2023/08/18 01:37:41 djm Exp $ */
/* $OpenBSD: kex.c,v 1.180 2023/08/21 21:16:18 tobhe Exp $ */
/*
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
*
@ -1353,7 +1353,7 @@ kex_exchange_identification(struct ssh *ssh, int timeout_ms,
len = atomicio(read, ssh_packet_get_connection_in(ssh),
&c, 1);
if (len != 1 && errno == EPIPE) {
error_f("Connection closed by remote host");
verbose_f("Connection closed by remote host");
r = SSH_ERR_CONN_CLOSED;
goto out;
} else if (len != 1) {
@ -1369,7 +1369,7 @@ kex_exchange_identification(struct ssh *ssh, int timeout_ms,
if (c == '\n')
break;
if (c == '\0' || expect_nl) {
error_f("banner line contains invalid "
verbose_f("banner line contains invalid "
"characters");
goto invalid;
}
@ -1379,7 +1379,7 @@ kex_exchange_identification(struct ssh *ssh, int timeout_ms,
goto out;
}
if (sshbuf_len(peer_version) > SSH_MAX_BANNER_LEN) {
error_f("banner line too long");
verbose_f("banner line too long");
goto invalid;
}
}
@ -1395,7 +1395,7 @@ kex_exchange_identification(struct ssh *ssh, int timeout_ms,
}
/* Do not accept lines before the SSH ident from a client */
if (ssh->kex->server) {
error_f("client sent invalid protocol identifier "
verbose_f("client sent invalid protocol identifier "
"\"%.256s\"", cp);
free(cp);
goto invalid;