Attachment 18954 Details for Bug 15973 – Patch for v4-23-test

Patch for v4-23-test

bfixes-tmp423.txt (text/plain), 5.68 KB, created by Stefan Metzmacher on 2026-04-28 13:11:57 UTC

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Creator: Stefan Metzmacher

Created: 2026-04-28 13:11:57 UTC

Size: 5.68 KB

patch

obsolete

>From 7fe79ba73210c96d2d67fdf5a03529eb03fc5318 Mon Sep 17 00:00:00 2001
>From: Stefan Metzmacher <metze@samba.org>
>Date: Mon, 27 Apr 2026 18:14:18 +0200
>Subject: [PATCH 1/3] s3:winbindd: let init_dc_connection_rpc() fail if
> domain->dcname is still NULL
>
>This can happen on a DC itself trying to talk to itself,
>which is currently not expected.
>
>BUG: https://bugzilla.samba.org/show_bug.cgi?id=15973
>
>Signed-off-by: Stefan Metzmacher <metze@samba.org>
>Reviewed-by: Volker Lendecke <vl@samba.org>
>(cherry picked from commit 38a9910ac99a015a3dac76b93f02d16e140c05e6)
>---
> source3/winbindd/winbindd_cm.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
>diff --git a/source3/winbindd/winbindd_cm.c b/source3/winbindd/winbindd_cm.c
>index 6e11461e07ef..72d59755bcfa 100644
>--- a/source3/winbindd/winbindd_cm.c
>+++ b/source3/winbindd/winbindd_cm.c
>@@ -1974,6 +1974,15 @@ static NTSTATUS init_dc_connection_rpc(struct winbindd_domain *domain, bool need
> 		return NT_STATUS_TRUSTED_DOMAIN_FAILURE;
> 	}
> 
>+	if (domain->dcname == NULL) {
>+		/*
>+		 * This can happen on a DC itself trying to talk to itself,
>+		 * which is currently not expected.
>+		 */
>+		DBG_WARNING("no dcname for domain %s\n", domain->name);
>+		return NT_STATUS_NO_LOGON_SERVERS;
>+	}
>+
> 	return NT_STATUS_OK;
> }
> 
>-- 
>2.43.0
>
>
>From a7a615add58b4032b4acf6ba1679378fbe7c909c Mon Sep 17 00:00:00 2001
>From: Stefan Metzmacher <metze@samba.org>
>Date: Mon, 27 Apr 2026 18:31:55 +0200
>Subject: [PATCH 2/3] s3:winbindd: replace
> smbXcli_conn_remote_{name,sockaddr}() with domain->{dcname,dcaddr}
>
>domain->conn.cli might be NULL, so we should not deference it.
>
>init_dc_connection_rpc() already checks that domain->dcname is not
>NULL...
>
>BUG: https://bugzilla.samba.org/show_bug.cgi?id=15973
>
>Signed-off-by: Stefan Metzmacher <metze@samba.org>
>Reviewed-by: Volker Lendecke <vl@samba.org>
>(cherry picked from commit 34c4ab4c610960ba587659e077608778970363a0)
>---
> source3/winbindd/winbindd_cm.c | 16 ++++++++--------
> 1 file changed, 8 insertions(+), 8 deletions(-)
>
>diff --git a/source3/winbindd/winbindd_cm.c b/source3/winbindd/winbindd_cm.c
>index 72d59755bcfa..31d56e0ac06a 100644
>--- a/source3/winbindd/winbindd_cm.c
>+++ b/source3/winbindd/winbindd_cm.c
>@@ -2571,8 +2571,8 @@ retry:
> 		goto anonymous;
> 	}
> 
>-	remote_name = smbXcli_conn_remote_name(conn->cli->conn);
>-	remote_sockaddr = smbXcli_conn_remote_sockaddr(conn->cli->conn);
>+	remote_name = domain->dcname;
>+	remote_sockaddr = &domain->dcaddr;
> 
> 	/*
> 	 * We have an authenticated connection. Use a SPNEGO
>@@ -2846,8 +2846,8 @@ static NTSTATUS cm_connect_lsa_tcp(struct winbindd_domain *domain,
> 		goto done;
> 	}
> 
>-	remote_name = smbXcli_conn_remote_name(conn->cli->conn);
>-	remote_sockaddr = smbXcli_conn_remote_sockaddr(conn->cli->conn);
>+	remote_name = domain->dcname;
>+	remote_sockaddr = &domain->dcaddr;
> 
> 	status = winbindd_get_trust_credentials(domain,
> 						talloc_tos(),
>@@ -2937,8 +2937,8 @@ retry:
> 		goto anonymous;
> 	}
> 
>-	remote_name = smbXcli_conn_remote_name(conn->cli->conn);
>-	remote_sockaddr = smbXcli_conn_remote_sockaddr(conn->cli->conn);
>+	remote_name = domain->dcname;
>+	remote_sockaddr = &domain->dcaddr;
> 
> 	/*
> 	 * We have an authenticated connection. Use a SPNEGO
>@@ -3222,8 +3222,8 @@ static NTSTATUS cm_connect_netlogon_transport(struct winbindd_domain *domain,
> 	TALLOC_FREE(conn->netlogon_pipe);
> 	TALLOC_FREE(conn->netlogon_creds_ctx);
> 
>-	remote_name = smbXcli_conn_remote_name(conn->cli->conn);
>-	remote_sockaddr = smbXcli_conn_remote_sockaddr(conn->cli->conn);
>+	remote_name = domain->dcname;
>+	remote_sockaddr = &domain->dcaddr;
> 
> 	result = winbindd_get_trust_credentials(domain,
> 						talloc_tos(),
>-- 
>2.43.0
>
>
>From 131e583768655b15f5a518aa357d50c492c16db6 Mon Sep 17 00:00:00 2001
>From: Stefan Metzmacher <metze@samba.org>
>Date: Mon, 27 Apr 2026 18:13:36 +0200
>Subject: [PATCH 3/3] s3:winbindd: let wb_irpc_SamLogon reject the local domain
> as RWDC
>
>If the clients use a subdomain of our domain the
>'sam' auth backend passed the request along to
>the 'winbind' auth backend. If winbindd tries
>to use the local domain we hit the case that
>an unknown domain was used. So we need to
>bounce the request back to 'sam_ignoredomain'.
>
>BUG: https://bugzilla.samba.org/show_bug.cgi?id=15973
>
>Signed-off-by: Stefan Metzmacher <metze@samba.org>
>Reviewed-by: Volker Lendecke <vl@samba.org>
>
>Autobuild-User(master): Volker Lendecke <vl@samba.org>
>Autobuild-Date(master): Tue Apr 28 11:49:16 UTC 2026 on atb-devel-224
>
>(cherry picked from commit b4e612725f9fe11f1791bd170cef8b0dade45ba6)
>---
> source3/winbindd/winbindd_irpc.c | 24 ++++++++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
>diff --git a/source3/winbindd/winbindd_irpc.c b/source3/winbindd/winbindd_irpc.c
>index 5981eb2d2445..7f36d7795fa0 100644
>--- a/source3/winbindd/winbindd_irpc.c
>+++ b/source3/winbindd/winbindd_irpc.c
>@@ -252,6 +252,30 @@ static NTSTATUS wb_irpc_SamLogon(struct irpc_message *msg,
> 		return NT_STATUS_OK;
> 	}
> 
>+	if (IS_DC && domain->primary && !domain->rodc) {
>+		/*
>+		 * target_domain_name might
>+		 * be a subdomain of domain->alt_name,
>+		 * that's why the 'sam' backend passed it along
>+		 * to 'winbind' auth backend, but we need to bounce
>+		 * it back to the 'sam_ignoredomain' backend.
>+		 */
>+		DBG_NOTICE("target_domain[%s] routed to primary domain[%s][%s]\n",
>+			   target_domain_name, domain->name, domain->alt_name);
>+		req->out.result = NT_STATUS_NO_SUCH_DOMAIN;
>+		req->out.authoritative = 0;
>+		return NT_STATUS_OK;
>+	}
>+
>+	if (IS_DC && domain->internal && !domain->rodc) {
>+		/*
>+		 * Something strange happened
>+		 */
>+		DBG_ERR("target_domain[%s] routed to internal domain[%s\n",
>+			target_domain_name, domain->name);
>+		return NT_STATUS_REQUEST_NOT_ACCEPTED;
>+	}
>+
> 	DEBUG(5, ("wb_irpc_SamLogon called\n"));
> 
> 	return wb_irpc_forward_rpc_call(msg, msg,
>-- 
>2.43.0
>

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Attachments on bug 15973: 18953 | 18954