[SSSD] [PATCH] ipa_server_mode: write capaths to krb5 include file

Jakub Hrozek jhrozek at redhat.com
Fri Sep 27 08:49:58 UTC 2013


On Fri, Sep 27, 2013 at 10:32:58AM +0200, Jakub Hrozek wrote:
> On Fri, Sep 27, 2013 at 10:14:23AM +0200, Sumit Bose wrote:
> > On Thu, Sep 26, 2013 at 10:27:07PM +0200, Jakub Hrozek wrote:
> > > On Thu, Sep 26, 2013 at 10:11:21PM +0200, Jakub Hrozek wrote:
> > > > On Thu, Sep 26, 2013 at 09:45:12PM +0200, Sumit Bose wrote:
> > > > > On Thu, Sep 26, 2013 at 07:24:03PM +0200, Jakub Hrozek wrote:
> > > > > > On Thu, Sep 26, 2013 at 11:22:06AM +0200, Sumit Bose wrote:
> > > > > > > Hi,
> > > > > > > 
> > > > > > > the first two attached patches should fix
> > > > > > > https://fedorahosted.org/sssd/ticket/2093 and make
> > > > > > > https://fedorahosted.org/sssd/ticket/2080 invalid. The third fixes wrong
> > > > > > > return code in one of the functions I touched with in the other patches.
> > > > > > > 
> > > > > > > bye,
> > > > > > > Sumit
> > > > > > 
> > > > > > > +    if (!ldb_dn_validate(dn)) {
> > > > > > > +        DEBUG(SSSDBG_OP_FAILURE, ("Original DN [%s] is not a valid DN.\n",
> > > > > > > +                                  orig_dn));
> > > > > > > +        ret = EINVAL;
> > > > > > > +        goto done;
> > > > > > > +    }
> > > > > > > +
> > > > > > > +    if (ldb_dn_get_comp_num(dn) < 5) {
> > > > > > > +        /* we are only interested in the member domain objects */
> > > > > > > +        ret = EOK;
> > > > > > > +        goto done;
> > > > > > > +    }
> > > > > > > +
> > > > > > > +    val = ldb_dn_get_component_val(dn, 3);
> > > > > > > +    if (strncasecmp("trusts", (const char *) val->data, val->length) != 0) {
> > > > > > > +        DEBUG(SSSDBG_TRACE_FUNC,
> > > > > > > +              ("4th component is not 'trust', nothing to do.\n"));
> > > > > > > +        ret = EOK;
> > > > > > > +        goto done;
> > > > > > > +    }
> > > > > > > +
> > > > > > > +    val = ldb_dn_get_component_val(dn, 2);
> > > > > > > +    if (strncasecmp("ad", (const char *) val->data, val->length) != 0) {
> > > > > > > +        DEBUG(SSSDBG_TRACE_FUNC,
> > > > > > > +              ("3rd component is not 'ad', nothing to do.\n"));
> > > > > > > +        ret = EOK;
> > > > > > > +        goto done;
> > > > > > > +    }
> > > > > > > +
> > > > > > > +    val = ldb_dn_get_component_val(dn, 1);
> > > > > > > +    forest = talloc_strndup(mem_ctx, (const char *) val->data, val->length);
> > > > > > > +    if (forest == NULL) {
> > > > > > > +        DEBUG(SSSDBG_OP_FAILURE, ("talloc_strndup failed.\n"));
> > > > > > > +        ret = ENOMEM;
> > > > > > > +        goto done;
> > > > > > > +    }
> > > > > > 
> > > > > > I think there is an off-by-one error here. In my setup, the original DN
> > > > > > is:
> > > > > > 
> > > > > > cn=AD.EXAMPLE.COM,cn=ad,cn=trusts,dc=ipatest,dc=example,dc=com
> > > > > > 
> > > > > > But "val = ldb_dn_get_component_val(dn, 3);" is "ipatest" in my case, so
> > > > > > the strcmp never matches. So I think the indexes should say "2, 1, 0".
> > > > > > 
> > > > > > It would also be nice to print the original DN in a DEBUG message.
> > > > > 
> > > > > ah, sorry, I should have said that Alexander's latest FreeIPA patches
> > > > > are needed here. They will store the member domains below the forest
> > > > > root object, e.g.
> > > > > cn=member.dom,cn=AD.EXAMPLE.COM,cn=ad,cn=trusts,dc=ipatest,dc=example,dc=com
> > > > > For those domains the patch will set the forest name which in this case
> > > > > is AD.EXAMPLE.COM.
> > > > > 
> > > > > bye,
> > > > > Sumit
> > > > 
> > > > Ah, then the code is fine. 
> > > > 
> > > > ACK.
> > > > 
> > > > But is should be noted that I only tested the file is generated and
> > > > contains the [capaths] section, not any actual functionality it brings.
> > > 
> > > Actually it seems that the sysdb tests are not happy:
> > > (gdb) r
> > > Starting program: /dev/shm/sssd/.libs/sysdb-tests 
> > > [Thread debugging using libthread_db enabled]
> > > Using host libthread_db library "/usr/lib64/libthread_db.so.1".
> > > Warning: LDB_MODULES_PATH is not set, will use LDB plugins installed in system paths.
> > > Running suite(s): sysdb
> > > ldb: unable to dlopen /usr/lib64/ldb/modules/ldb/memberof.la : /usr/lib64/ldb/modules/ldb/memberof.la: invalid ELF header
> > > 
> > > Program received signal SIGSEGV, Segmentation fault.
> > > __strcasecmp_l_avx () at ../sysdeps/x86_64/multiarch/strcmp-sse42.S:164
> > > 164             movdqu  (%rdi), %xmm1
> > > (gdb) bt
> > > #0  __strcasecmp_l_avx () at ../sysdeps/x86_64/multiarch/strcmp-sse42.S:164
> > > #1  0x00007ffff7facc16 in sysdb_update_subdomains (domain=0x57ec70) at /home/remote/jhrozek/devel/sssd/src/db/sysdb_subdomains.c:164
> > > #2  0x0000000000417752 in test_sysdb_subdomain_create (_i=0) at /home/remote/jhrozek/devel/sssd/src/tests/sysdb-tests.c:4558
> > > #3  0x00007ffff7bd7d12 in tcase_run_tfun_nofork (sr=sr at entry=0x42b180, tc=tc at entry=0x42ac00, i=i at entry=0, tfun=0x42ad40, tfun=0x42ad40) at check_run.c:332
> > > #4  0x00007ffff7bd7f6e in srunner_iterate_tcase_tfuns (tc=0x42ac00, sr=0x42b180) at check_run.c:192
> > > #5  srunner_run_tcase (tc=0x42ac00, sr=0x42b180) at check_run.c:318
> > > #6  srunner_iterate_suites (print_mode=<optimized out>, tcname=0x0, sname=0x0, sr=0x42b180) at check_run.c:161
> > > #7  srunner_run (sr=0x42b180, sname=0x0, tcname=0x0, print_mode=<optimized out>) at check_run.c:596
> > > #8  0x000000000041a42b in main (argc=1, argv=0x7fffffffdc48) at /home/remote/jhrozek/devel/sssd/src/tests/sysdb-tests.c:5369
> > 
> > sorry I haven't seen this on my 32bit VM, but I reproduce it on 64bits.
> > 
> > If have added a check to prevent this. As you suggested I also added a
> > debug message with the current original DN and a comment explaining the
> > IPA tree layout with respect to member domains in a forest. All changes
> > are in the first patch, the others are unchanged.
> > 
> > bye,
> > Sumit
> 
> capaths are still written OK, code builds and tests pass.
> 
> ACK

Pushed to master and sssd-1-11



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