URL: https://github.com/SSSD/sssd/pull/5453
Title: #5453: gssapi: default pam_gssapi_services to NULL in domain section and 
coverity fixes

alexey-tikhonov commented:
"""
Hi,

there is a compilation warning:
```
../src/sss_client/pam_sss_gss.c:339:5: warning: ‘reply’ may be used 
uninitialized in this function [-Wmaybe-uninitialized]
  339 |     free(reply);
      |     ^~~~~~~~~~~
../src/sss_client/pam_sss_gss.c:328:14: note: ‘reply’ was declared here
  328 |     uint8_t *reply;
      |              ^~~~~
../src/sss_client/pam_sss_gss.c:270:11: warning: ‘reply_len’ may be used 
uninitialized in this function [-Wmaybe-uninitialized]
  270 |     upn = malloc(reply_len * sizeof(char));
      |           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/sss_client/pam_sss_gss.c:327:12: note: ‘reply_len’ was declared here
  327 |     size_t reply_len;
      |            ^~~~~~~~~
```

That's false positive but I think still better to suppress.

Otherwise ACK for the 2nd patch ("fix coverity issues").

"""

See the full comment at 
https://github.com/SSSD/sssd/pull/5453#issuecomment-758823747
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