[Bug 2120680] New: sssd-client-2.7.3-1.fc36.x86_64 causes duplicati backups to fail - _nss_sss_getpwuid_r is involved

https://bugzilla.redhat.com/show_bug.cgi?id=2120680

            Bug ID: 2120680
           Summary: sssd-client-2.7.3-1.fc36.x86_64 causes duplicati
                    backups to fail - _nss_sss_getpwuid_r is involved
           Product: Fedora
           Version: 36
            Status: NEW
         Component: sssd
          Severity: high
          Assignee: sssd-maintainers(a)lists.fedoraproject.org
          Reporter: louis(a)qdcec.co.za
        QA Contact: extras-qa(a)fedoraproject.org
                CC: abokovoy(a)redhat.com, atikhono(a)redhat.com,
                    jhrozek(a)redhat.com, lslebodn(a)redhat.com,
                    luk.claes(a)gmail.com, mzidek(a)redhat.com,
                    pbrezina(a)redhat.com, sbose(a)redhat.com,
                    ssorce(a)redhat.com,
                    sssd-maintainers(a)lists.fedoraproject.org
  Target Milestone: ---
    Classification: Fedora



Created attachment 1907139
  --> https://bugzilla.redhat.com/attachment.cgi?id=1907139&action=edit
/var/log/messages at the time of failure

Description of problem:

I had been running Duplicati (backup system) successfully for the July 2022. 
Suddenly, at the start of August, the jobs would crash after a random time
period, at any random file.  I upgraded from Fedora 35 to Fedora 36, which
didn't help.  Eventually I found that downgrading sssd-client from 2.7.3-1
(which installed 2.7.0-1) fixed the problem and I got the first successful
backups in three weeks.  

Duplicati uses mono to run.


Version-Release number of selected component (if applicable):
Duplicati was working perfectly when using
   sssd-client-2.7.1-2.fc35.x86_64
However, after upgrading the sssd group of packages the jobs began to fail.
   sssd-client-2.7.3-1.fc35.x86_64
As mentioned, I upgraded to Fedora 36, and it still failed when I was running
   sssd-client-2.7.3-1.fc36.x86_64
But it worked again after running "dnf downgrade sssd-client" which installed 
   sssd-client-2.7.0-1.fc36.x86_64


How reproducible:
Once sssd 2.7.3-1 is running, backing up local files (e.g. /home) backed up via
Duplicati to an SFTP destination fails at a random time of 10 seconds to 5
hours, and never on the same file.  I will paste the /var/log/messages crash
dump under "actual results".


Steps to Reproduce:
1. Install Duplicati and run successfully along with sssd-client-2.7.1-2 or
earlier.
2. Upgrade to sssd-client-2.7.3-1
3. Become frustrated as backup jobs crash before completion.


Actual results:

The attached file shows what is recorded in /var/log/messages as the crash
happens.

Noteworthy entries from another crash are:
Aug  9 20:59:31 fedora duplicati-server[265988]: #9  0x00007f93c6e37576 in
__assert_fail () from /lib64/libc.so.6
Aug  9 20:59:31 fedora duplicati-server[265988]: #10 0x00007f93c6e902b0 in
pthread_mutex_lock@(a)GLIBC_2.2.5 () from /lib64/libc.so.6
Aug  9 20:59:31 fedora duplicati-server[265988]: #11 0x00007f93c71c6736 in
sss_nss_mc_get_ctx () from /lib64/libnss_sss.so.2
Aug  9 20:59:31 fedora duplicati-server[265988]: #12 0x00007f93c71c71fe in
sss_nss_mc_getpwuid () from /lib64/libnss_sss.so.2
Aug  9 20:59:31 fedora duplicati-server[265988]: #13 0x00007f93c71c9036 in
_nss_sss_getpwuid_r () from /lib64/libnss_sss.so.2
Aug  9 20:59:31 fedora duplicati-server[265988]: #14 0x00007f93c6edc631 in
getpwuid_r@(a)GLIBC_2.2.5 () from /lib64/libc.so.6


Expected results:

It should work as it did before updating the sssd suite.


Additional info:
See the discussion at
https://forum.duplicati.com/t/suddenly-started-crashing-mono-sgen-pthread...


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https://bugzilla.redhat.com/show_bug.cgi?id=2120680

[Bug 2120680] sssd-client-2.7.3-1.fc36.x86_64 causes duplicati backups to fail - _nss_sss_getpwuid_r is involved

https://bugzilla.redhat.com/show_bug.cgi?id=2120680

Alexey Tikhonov <atikhono(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |CLOSED
           Doc Type|---                         |If docs needed, set a value
         Resolution|---                         |DUPLICATE
        Last Closed|                            |2022-08-23 14:26:26



--- Comment #1 from Alexey Tikhonov <atikhono(a)redhat.com&gt; ---
Hi,

I think this is a dulicate of bz 2111582. Fixed upstream, should be fixed in
Fedora soon.

*** This bug has been marked as a duplicate of bug 2111582 ***


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https://bugzilla.redhat.com/show_bug.cgi?id=2120680