[SSSD] [PATCH] Two minor patches for tokenGroups nested group processing

Lukas Slebodnik lslebodn at redhat.com
Mon Aug 11 13:16:12 UTC 2014


On (11/08/14 10:29), Lukas Slebodnik wrote:
>On (11/08/14 10:24), Jakub Hrozek wrote:
>>On Mon, Aug 11, 2014 at 10:05:56AM +0200, Lukas Slebodnik wrote:
>>> On (22/07/14 18:43), Jakub Hrozek wrote:
>>> >On Thu, Mar 13, 2014 at 12:00:47PM +0100, Sumit Bose wrote:
>>> >> On Wed, Mar 12, 2014 at 11:20:42PM +0100, Jakub Hrozek wrote:
>>> >> > Hi,
>>> >> > 
>>> >> > the attached two patches are not strictly related to tokenGroups
>>> >> > processing, but it's very easy to reproduce the problem that way. The
>>> >> > issue is only confusing DEBUG messages, but it has already cost me
>>> >> > several hours in processing logs from an SSSD user, so I think a fix is
>>> >> > due, at least for master.
>>> >> > 
>>> >> > See the patches and the commit messages for more details.
>>> >> 
>>> >> as a first note, the second patch makes nestedgroups-tests fail because
>>> >> sdap_idmap_domain_has_algorithmic_mapping() must be made available to
>>> >> the test and sdap_idmap_ctx must be initialized.
>>> >> 
>>> >> But since this 'only' influences the tests I will run some tests with
>>> >> the current version of the patches.
>>> >> 
>>> >> bye,
>>> >> Sumit
>>> >
>>> >I completely forgot about these patches until I was doing cleanup of my
>>> >git branches. Attached is a new revision..
>>> 
>>> >From 3c4ce4a2b9f58e0b50f9ad48d07110b30bc74cd9 Mon Sep 17 00:00:00 2001
>>> >From: Jakub Hrozek <jhrozek at redhat.com>
>>> >Date: Tue, 11 Mar 2014 17:39:31 +0100
>>> >Subject: [PATCH 2/2] Only check GID if ID-mapping
>>> >
>>> >---
>>> > Makefile.am                                   | 11 ++++++++---
>>> > src/providers/ldap/sdap_async_nested_groups.c |  9 ++++++++-
>>> > src/tests/cmocka/test_nested_groups.c         | 20 ++++++++++++++++++++
>>> > 3 files changed, 36 insertions(+), 4 deletions(-)
>>> >
>>> >diff --git a/Makefile.am b/Makefile.am
>>> >index e3592868ce29b569a71f6ad74bc24cc617301b34..783a8922ede16ea3cc3eb6df568773126c5661fb 100644
>>> >--- a/Makefile.am
>>> >+++ b/Makefile.am
>>> >@@ -1740,15 +1740,20 @@ fqnames_tests_LDADD = \
>>> > nestedgroups_tests_SOURCES = \
>>> >     $(TEST_MOCK_OBJ) \
>>> >     $(TEST_MOCK_PROVIDER_OBJ) \
>>> >+    src/providers/ldap/sdap_idmap.c \
>>> >     src/tests/cmocka/test_nested_groups.c \
>>> >-    src/providers/ldap/sdap_async_nested_groups.c
>>> >+    src/providers/ldap/sdap_async_nested_groups.c \
>>> >+    $(NULL)
>>> > nestedgroups_tests_CFLAGS = \
>>> >-    $(AM_CFLAGS)
>>> >+    $(AM_CFLAGS) \
>>> >+    $(NULL)
>>> > nestedgroups_tests_LDADD = \
>>> >     $(CMOCKA_LIBS) \
>>> >     $(SSSD_LIBS) \
>>> >     $(SSSD_INTERNAL_LTLIBS) \
>>> >-    libsss_test_common.la
>>> >+    libsss_idmap.la \
>>> >+    libsss_test_common.la \
>>> >+    $(NULL)
>>> > 
>>> > test_sss_idmap_SOURCES = \
>>> >     src/tests/cmocka/test_sss_idmap.c
>>> >diff --git a/src/providers/ldap/sdap_async_nested_groups.c b/src/providers/ldap/sdap_async_nested_groups.c
>>> >index 305afbc9d4f153fe2daa6289cc318b1183be72ca..5398b14bc0e163c122def1c3d729b28d72873b82 100644
>>> >--- a/src/providers/ldap/sdap_async_nested_groups.c
>>> >+++ b/src/providers/ldap/sdap_async_nested_groups.c
>>> >@@ -34,6 +34,7 @@
>>> > #include "providers/ldap/ldap_common.h"
>>> > #include "providers/ldap/sdap_async.h"
>>> > #include "providers/ldap/sdap_async_private.h"
>>> >+#include "providers/ldap/sdap_idmap.h"
>>> > 
>>> > #define sdap_nested_group_sysdb_search_users(domain, filter) \
>>> >     sdap_nested_group_sysdb_search((domain), (filter), true)
>>> >@@ -242,6 +243,7 @@ sdap_nested_group_hash_group(struct sdap_nested_group_ctx *group_ctx,
>>> >     errno_t ret;
>>> >     int32_t ad_group_type;
>>> >     bool posix_group = true;
>>> >+    bool use_id_mapping;
>>> > 
>>> >     if (group_ctx->opts->schema_type == SDAP_SCHEMA_AD) {
>>> >         ret = sysdb_attrs_get_int32_t(group, SYSDB_GROUP_TYPE, &ad_group_type);
>>> >@@ -265,7 +267,12 @@ sdap_nested_group_hash_group(struct sdap_nested_group_ctx *group_ctx,
>>> >         }
>>> >     }
>>> > 
>>> >-    if (posix_group) {
>>> >+    use_id_mapping = sdap_idmap_domain_has_algorithmic_mapping(
>>> >+                                                          group_ctx->opts->idmap_ctx,
>>> >+                                                          group_ctx->domain->name,
>>> >+                                                          group_ctx->domain->domain_id);
>>> >+
>>> >+    if (posix_group && !use_id_mapping) {
>>> >         ret = sysdb_attrs_get_uint32_t(group, map[SDAP_AT_GROUP_GID].sys_name,
>>> >                                        &gid);
>>> >     }
>>> 
>>> 270 use_id_mapping = sdap_idmap_domain_has_algorithmic_mapping(
>>> 271 group_ctx->opts->idmap_ctx,
>>> 272 group_ctx->domain->name,
>>> 273 group_ctx->domain->domain_id);
>>> 274
>>> 275 if (posix_group && !use_id_mapping) {
>>>         // 'posix_group' can be true and 'use_id_mapping' is not equal to 0
>>>         // sysdb_attrs_get_uint32_t will not be called.
>>> 276     ret = sysdb_attrs_get_uint32_t(group, map[SDAP_AT_GROUP_GID].sys_name,
>>> 277                                    &gid);
>>> 278 }
>>> 279 if (!posix_group || ret == ENOENT || (ret == EOK && gid == 0)) {
>>>                         ^^^^^^^^^^^^^
>>>             'ret' needn't be ENOENT because function 'sysdb_attrs_get_int32_t'
>>>              could be called on line 249
>>> 
>>>             'gid' will not be initialised.
>>> 
>>> LS
>>
>>Can you send a patch?
>I didn't send, because I was not sure was is the right solution.
>
>LS
I saw it also in vagrind output.

==1895== Conditional jump or move depends on uninitialised value(s)
==1895==    at 0x13F1A1D7: sdap_nested_group_hash_group (sdap_async_nested_groups.c:279)
==1895==    by 0x13F1DAA1: sdap_nested_group_send (sdap_async_nested_groups.c:718)
==1895==    by 0x13F1998D: sdap_get_groups_process (sdap_async_groups.c:1847)
==1895==    by 0x13F0F9CE: sdap_get_generic_ext_done (sdap_async.c:1467)
==1895==    by 0x13F0EE9F: sdap_process_result (sdap_async.c:357)
==1895==    by 0x54ABFBE: tevent_common_loop_timer_delay (in /usr/lib64/libtevent.so.0.9.20)
==1895==    by 0x54ACFC9: ??? (in /usr/lib64/libtevent.so.0.9.20)
==1895==    by 0x54AB6B6: ??? (in /usr/lib64/libtevent.so.0.9.20)
==1895==    by 0x54A7F2C: _tevent_loop_once (in /usr/lib64/libtevent.so.0.9.20)
==1895==    by 0x54A80CA: tevent_common_loop_wait (in /usr/lib64/libtevent.so.0.9.20)
==1895==    by 0x54AB656: ??? (in /usr/lib64/libtevent.so.0.9.20)
==1895==    by 0x5283872: server_loop (server.c:587)

Do we want to initialise variable 'gid' to 0 or (gid_t)-1?

LS



More information about the sssd-devel mailing list