PAM Kerberos authentication fails with a clock skew error
resolves: rhbz#2076504
This commit is contained in:
Pavel Filipenský
parent
a7e18a932f
commit
f2a9933a49
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@ -0,0 +1,347 @@
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From 01205e1ff2a16ecdeb99fd4153f40f917decacee Mon Sep 17 00:00:00 2001
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From: Samuel Cabrero <scabrero@samba.org>
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Date: Wed, 13 Apr 2022 11:01:00 +0200
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Subject: [PATCH 1/4] s3:winbind: Do not use domain's private data to store the
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SAMR pipes
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The domain's private_data pointer is also used to store a ADS_STRUCT,
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which is not allocated using talloc and there are many places casting
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this pointer directly.
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The recently added samba.tests.pam_winbind_setcred was randomly failing
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and after debugging it the problem was that kerberos authentication was
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failing because the time_offset passed to kerberos_return_pac() was
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wrong. This time_offset was retrieved from ads->auth.time_offset, where
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the ads pointer was directly casted from domain->private_data but
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private_data was pointing to a winbind_internal_pipes struct.
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=15046
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Signed-off-by: Samuel Cabrero <scabrero@samba.org>
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Reviewed-by: Stefan Metzmacher <metze@samba.org>
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Reviewed-by: Andreas Schneider <asn@samba.org>
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(cherry picked from commit e1f29b0970f4cac52a9cd517be6862cf69a1433a)
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---
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source3/winbindd/winbindd.h | 6 ++++++
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source3/winbindd/winbindd_ndr.c | 3 +++
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source3/winbindd/winbindd_samr.c | 18 ++++++------------
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3 files changed, 15 insertions(+), 12 deletions(-)
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diff --git a/source3/winbindd/winbindd.h b/source3/winbindd/winbindd.h
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index dac4a1fa927..762844502e5 100644
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--- a/source3/winbindd/winbindd.h
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+++ b/source3/winbindd/winbindd.h
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@@ -43,6 +43,8 @@
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#define WB_REPLACE_CHAR '_'
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+struct winbind_internal_pipes;
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+
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struct winbindd_cli_state {
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struct winbindd_cli_state *prev, *next; /* Linked list pointers */
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int sock; /* Open socket from client */
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@@ -157,6 +159,10 @@ struct winbindd_domain {
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void *private_data;
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+ struct {
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+ struct winbind_internal_pipes *samr_pipes;
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+ } backend_data;
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+
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/* A working DC */
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char *dcname;
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const char *ping_dcname;
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diff --git a/source3/winbindd/winbindd_ndr.c b/source3/winbindd/winbindd_ndr.c
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index 157ce1bff27..36901776b98 100644
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--- a/source3/winbindd/winbindd_ndr.c
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+++ b/source3/winbindd/winbindd_ndr.c
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@@ -144,6 +144,9 @@ void ndr_print_winbindd_domain(struct ndr_print *ndr,
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ndr_print_bool(ndr, "startup", r->startup);
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ndr_print_winbindd_methods(ndr, "backend", r->backend);
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ndr_print_ptr(ndr, "private_data", r->private_data);
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+ ndr_print_ptr(ndr,
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+ "backend_data.samr_pipes",
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+ r->backend_data.samr_pipes);
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ndr_print_string(ndr, "dcname", r->dcname);
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ndr_print_sockaddr_storage(ndr, "dcaddr", &r->dcaddr);
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ndr_print_time_t(ndr, "last_seq_check", r->last_seq_check);
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diff --git a/source3/winbindd/winbindd_samr.c b/source3/winbindd/winbindd_samr.c
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index 5e23ff8217b..ce66adcc0c7 100644
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--- a/source3/winbindd/winbindd_samr.c
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+++ b/source3/winbindd/winbindd_samr.c
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@@ -130,7 +130,7 @@ static NTSTATUS open_cached_internal_pipe_conn(
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{
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struct winbind_internal_pipes *internal_pipes = NULL;
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- if (domain->private_data == NULL) {
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+ if (domain->backend_data.samr_pipes == NULL) {
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TALLOC_CTX *frame = talloc_stackframe();
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NTSTATUS status;
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@@ -156,14 +156,14 @@ static NTSTATUS open_cached_internal_pipe_conn(
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return status;
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}
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- domain->private_data = talloc_move(domain, &internal_pipes);
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+ domain->backend_data.samr_pipes =
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+ talloc_move(domain, &internal_pipes);
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TALLOC_FREE(frame);
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}
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- internal_pipes = talloc_get_type_abort(
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- domain->private_data, struct winbind_internal_pipes);
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+ internal_pipes = domain->backend_data.samr_pipes;
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if (samr_domain_hnd) {
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*samr_domain_hnd = internal_pipes->samr_domain_hnd;
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@@ -188,23 +188,17 @@ static bool reset_connection_on_error(struct winbindd_domain *domain,
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struct rpc_pipe_client *p,
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NTSTATUS status)
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{
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- struct winbind_internal_pipes *internal_pipes = NULL;
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struct dcerpc_binding_handle *b = p->binding_handle;
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- internal_pipes = talloc_get_type_abort(
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- domain->private_data, struct winbind_internal_pipes);
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-
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if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT) ||
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NT_STATUS_EQUAL(status, NT_STATUS_IO_DEVICE_ERROR))
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{
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- TALLOC_FREE(internal_pipes);
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- domain->private_data = NULL;
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+ TALLOC_FREE(domain->backend_data.samr_pipes);
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return true;
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}
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if (!dcerpc_binding_handle_is_connected(b)) {
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- TALLOC_FREE(internal_pipes);
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- domain->private_data = NULL;
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+ TALLOC_FREE(domain->backend_data.samr_pipes);
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return true;
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}
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--
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2.35.1
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From 79ab2a5669a1e21e96f29cecc651dccacd7ace71 Mon Sep 17 00:00:00 2001
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From: Samuel Cabrero <scabrero@samba.org>
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Date: Wed, 13 Apr 2022 11:15:35 +0200
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Subject: [PATCH 2/4] s3:winbind: Simplify open_cached_internal_pipe_conn()
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=15046
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Signed-off-by: Samuel Cabrero <scabrero@samba.org>
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Reviewed-by: Stefan Metzmacher <metze@samba.org>
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Reviewed-by: Andreas Schneider <asn@samba.org>
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(cherry picked from commit 91395e660a2b1b69bf74ca0b77aee416e2ac1db3)
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---
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source3/winbindd/winbindd_samr.c | 10 ++++------
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1 file changed, 4 insertions(+), 6 deletions(-)
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diff --git a/source3/winbindd/winbindd_samr.c b/source3/winbindd/winbindd_samr.c
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index ce66adcc0c7..20b5d758d1a 100644
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--- a/source3/winbindd/winbindd_samr.c
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+++ b/source3/winbindd/winbindd_samr.c
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@@ -128,9 +128,10 @@ static NTSTATUS open_cached_internal_pipe_conn(
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struct rpc_pipe_client **lsa_pipe,
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struct policy_handle *lsa_hnd)
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{
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- struct winbind_internal_pipes *internal_pipes = NULL;
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+ struct winbind_internal_pipes *internal_pipes =
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+ domain->backend_data.samr_pipes;
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- if (domain->backend_data.samr_pipes == NULL) {
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+ if (internal_pipes == NULL) {
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TALLOC_CTX *frame = talloc_stackframe();
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NTSTATUS status;
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@@ -157,14 +158,11 @@ static NTSTATUS open_cached_internal_pipe_conn(
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}
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domain->backend_data.samr_pipes =
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- talloc_move(domain, &internal_pipes);
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+ talloc_steal(domain, internal_pipes);
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TALLOC_FREE(frame);
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-
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}
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- internal_pipes = domain->backend_data.samr_pipes;
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-
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if (samr_domain_hnd) {
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*samr_domain_hnd = internal_pipes->samr_domain_hnd;
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}
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--
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2.35.1
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From d57f54deef45c638093717378adc1a0743699ae8 Mon Sep 17 00:00:00 2001
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From: Samuel Cabrero <scabrero@samba.org>
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Date: Wed, 13 Apr 2022 11:31:45 +0200
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Subject: [PATCH 3/4] s3:winbind: Do not use domain's private data to store the
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ADS_STRUCT
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The ADS_STRUCT is not allocated using talloc and there are many places
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casting this pointer directly so use a typed pointer.
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=15046
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Signed-off-by: Samuel Cabrero <scabrero@samba.org>
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Reviewed-by: Stefan Metzmacher <metze@samba.org>
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Reviewed-by: Andreas Schneider <asn@samba.org>
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(cherry picked from commit 3cb256439e9ceece26c2de82293c43486543e0cb)
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---
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source3/winbindd/winbindd.h | 2 ++
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source3/winbindd/winbindd_ads.c | 10 +++++-----
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source3/winbindd/winbindd_ndr.c | 3 +++
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source3/winbindd/winbindd_pam.c | 6 ++----
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4 files changed, 12 insertions(+), 9 deletions(-)
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diff --git a/source3/winbindd/winbindd.h b/source3/winbindd/winbindd.h
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index 762844502e5..3cc88367b90 100644
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--- a/source3/winbindd/winbindd.h
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+++ b/source3/winbindd/winbindd.h
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@@ -44,6 +44,7 @@
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#define WB_REPLACE_CHAR '_'
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struct winbind_internal_pipes;
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+struct ads_struct;
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struct winbindd_cli_state {
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struct winbindd_cli_state *prev, *next; /* Linked list pointers */
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@@ -161,6 +162,7 @@ struct winbindd_domain {
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struct {
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struct winbind_internal_pipes *samr_pipes;
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+ struct ads_struct *ads_conn;
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} backend_data;
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/* A working DC */
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diff --git a/source3/winbindd/winbindd_ads.c b/source3/winbindd/winbindd_ads.c
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index 6f01ef6e334..d350f160223 100644
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--- a/source3/winbindd/winbindd_ads.c
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+++ b/source3/winbindd/winbindd_ads.c
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@@ -269,10 +269,10 @@ static ADS_STRUCT *ads_cached_connection(struct winbindd_domain *domain)
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}
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DEBUG(10,("ads_cached_connection\n"));
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- ads_cached_connection_reuse((ADS_STRUCT **)&domain->private_data);
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+ ads_cached_connection_reuse(&domain->backend_data.ads_conn);
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- if (domain->private_data) {
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- return (ADS_STRUCT *)domain->private_data;
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+ if (domain->backend_data.ads_conn != NULL) {
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+ return domain->backend_data.ads_conn;
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}
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/* the machine acct password might have change - fetch it every time */
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@@ -303,7 +303,7 @@ static ADS_STRUCT *ads_cached_connection(struct winbindd_domain *domain)
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}
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status = ads_cached_connection_connect(
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- (ADS_STRUCT **)&domain->private_data,
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+ &domain->backend_data.ads_conn,
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domain->alt_name,
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domain->name, NULL,
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password, realm,
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@@ -322,7 +322,7 @@ static ADS_STRUCT *ads_cached_connection(struct winbindd_domain *domain)
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return NULL;
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}
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- return (ADS_STRUCT *)domain->private_data;
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+ return domain->backend_data.ads_conn;
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}
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/* Query display info for a realm. This is the basic user list fn */
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diff --git a/source3/winbindd/winbindd_ndr.c b/source3/winbindd/winbindd_ndr.c
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index 36901776b98..94ce9d73747 100644
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--- a/source3/winbindd/winbindd_ndr.c
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+++ b/source3/winbindd/winbindd_ndr.c
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@@ -147,6 +147,9 @@ void ndr_print_winbindd_domain(struct ndr_print *ndr,
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ndr_print_ptr(ndr,
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"backend_data.samr_pipes",
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r->backend_data.samr_pipes);
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+ ndr_print_ptr(ndr,
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+ "backend_data.ads_conn",
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+ r->backend_data.ads_conn);
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ndr_print_string(ndr, "dcname", r->dcname);
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ndr_print_sockaddr_storage(ndr, "dcaddr", &r->dcaddr);
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ndr_print_time_t(ndr, "last_seq_check", r->last_seq_check);
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diff --git a/source3/winbindd/winbindd_pam.c b/source3/winbindd/winbindd_pam.c
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index 1a2628b50ba..5505220335f 100644
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--- a/source3/winbindd/winbindd_pam.c
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+++ b/source3/winbindd/winbindd_pam.c
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@@ -677,7 +677,6 @@ static NTSTATUS winbindd_raw_kerberos_login(TALLOC_CTX *mem_ctx,
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fstring name_namespace, name_domain, name_user;
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time_t ticket_lifetime = 0;
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time_t renewal_until = 0;
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- ADS_STRUCT *ads;
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time_t time_offset = 0;
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const char *user_ccache_file;
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struct PAC_LOGON_INFO *logon_info = NULL;
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@@ -716,9 +715,8 @@ static NTSTATUS winbindd_raw_kerberos_login(TALLOC_CTX *mem_ctx,
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/* 2nd step:
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* get kerberos properties */
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- if (domain->private_data) {
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- ads = (ADS_STRUCT *)domain->private_data;
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- time_offset = ads->auth.time_offset;
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+ if (domain->backend_data.ads_conn != NULL) {
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+ time_offset = domain->backend_data.ads_conn->auth.time_offset;
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}
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--
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2.35.1
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From e32528fd5abbace15b3aad2c7cec8d9c6ade7bf7 Mon Sep 17 00:00:00 2001
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From: Samuel Cabrero <scabrero@samba.org>
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Date: Wed, 13 Apr 2022 11:34:18 +0200
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Subject: [PATCH 4/4] s3:winbind: Remove no longer used domain's private_data
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pointer
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=15046
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Signed-off-by: Samuel Cabrero <scabrero@samba.org>
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Reviewed-by: Stefan Metzmacher <metze@samba.org>
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Reviewed-by: Andreas Schneider <asn@samba.org>
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(cherry picked from commit a6d6ae3cfcd64a85f82ec5b12253ca0e237d95bb)
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---
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source3/winbindd/winbindd.h | 4 ----
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source3/winbindd/winbindd_ndr.c | 1 -
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2 files changed, 5 deletions(-)
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diff --git a/source3/winbindd/winbindd.h b/source3/winbindd/winbindd.h
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index 3cc88367b90..fe286a9a686 100644
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--- a/source3/winbindd/winbindd.h
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+++ b/source3/winbindd/winbindd.h
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@@ -156,10 +156,6 @@ struct winbindd_domain {
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*/
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struct winbindd_methods *backend;
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- /* Private data for the backends (used for connection cache) */
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-
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- void *private_data;
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-
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struct {
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struct winbind_internal_pipes *samr_pipes;
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struct ads_struct *ads_conn;
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diff --git a/source3/winbindd/winbindd_ndr.c b/source3/winbindd/winbindd_ndr.c
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index 94ce9d73747..b393586a692 100644
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--- a/source3/winbindd/winbindd_ndr.c
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+++ b/source3/winbindd/winbindd_ndr.c
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@@ -143,7 +143,6 @@ void ndr_print_winbindd_domain(struct ndr_print *ndr,
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ndr_print_time_t(ndr, "startup_time", r->startup_time);
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ndr_print_bool(ndr, "startup", r->startup);
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ndr_print_winbindd_methods(ndr, "backend", r->backend);
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- ndr_print_ptr(ndr, "private_data", r->private_data);
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ndr_print_ptr(ndr,
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"backend_data.samr_pipes",
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r->backend_data.samr_pipes);
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--
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2.35.1
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@ -132,7 +132,7 @@
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%define samba_requires_eq() %(LC_ALL="C" echo '%*' | xargs -r rpm -q --qf 'Requires: %%{name} = %%{epoch}:%%{version}\\n' | sed -e 's/ (none):/ /' -e 's/ 0:/ /' | grep -v "is not")
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%global baserelease 106
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%global baserelease 107
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%global samba_version 4.15.5
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%global talloc_version 2.3.3
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@ -213,6 +213,7 @@ Patch8: samba-4-15-fix-autorid.patch
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Patch9: samba-4-15-fix-winbind-refresh-tickets.patch
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Patch10: samba-4-15-fix-create-local-krb5-conf.patch
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Patch11: samba-4-15-username-map.patch
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Patch12: samba-4-15-kerberos-clock-skew.patch
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Requires(pre): /usr/sbin/groupadd
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Requires(post): systemd
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@ -4113,6 +4114,7 @@ fi
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%changelog
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* Wed Apr 20 2022 Pavel Filipenský <pfilipen@redhat.com> - 4.15.5-106
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- resolves: rhbz#2065376 - Fix 'create krb5 conf = yes` when a KDC has a single IP address.
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- resolves: rhbz#2076504 - PAM Kerberos authentication fails with a clock skew error
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* Wed Apr 13 2022 Pavel Filipenský <pfilipen@redhat.com> - 4.15.5-105
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- resolves: rhbz#2074891 - Fix username map for unix groups
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