Public bug reported:
I've been researching the appearance of an error message in
sssd_nss.log.
[sssd[nss]] [nss_cmd_getpwuid_search] (0x0040): No matching domain
found for [-1], fail!
Although I don't know yet where this "-1" is coming from, I have
discovered something else which indicates a (possibly unrelated) bug.
Cranking up the debug_level we see the following when doing "su -c pwd
foo"
(Sun Oct 14 17:47:33 2012) [sssd[nss]] [nss_cmd_getpwuid_search] (0x0100):
Requesting info for [-1@SAMBA]
(Sun Oct 14 17:47:33 2012) [sssd[nss]] [sss_dp_issue_request] (0x0400): Issuing
request for [0x42bcd0:1:-1@SAMBA]
(Sun Oct 14 17:47:33 2012) [sssd[nss]] [sss_dp_get_account_msg] (0x0400):
Creating request for [SAMBA][4097][1][idnumber=4294967295]
(Sun Oct 14 17:47:33 2012) [sssd[nss]] [sss_dp_internal_get_send] (0x0400):
Entering request [0x42bcd0:1:-1@SAMBA]
(Sun Oct 14 17:47:33 2012) [sssd[nss]] [nss_cmd_getpwuid_search] (0x0100):
Requesting info for [-1@SAMBA]
(Sun Oct 14 17:47:33 2012) [sssd[nss]] [nss_cmd_getpwuid_search] (0x0040): No
matching domain found for [-1], fail!
(Sun Oct 14 17:47:33 2012) [sssd[nss]] [sss_dp_req_destructor] (0x0400):
Deleting request: [0x42bcd0:1:-1@SAMBA]
(Sun Oct 14 17:47:33 2012) [sssd[nss]] [sss_parse_name_for_domains] (0x0200):
name 'foo' matched without domain, user is foo
[...]
Adding
max_id = 999999
to the [domain/SAMBA] section of sssd.conf changes this to:
(Sun Oct 14 17:49:32 2012) [sssd[nss]] [nss_cmd_getpwuid_search] (0x0100): Uid
[4294967295] does not exist in domain [SAMBA]! (id out of range)
(Sun Oct 14 17:49:32 2012) [sssd[nss]] [nss_cmd_getpwuid_search] (0x0040): No
matching domain found for [-1], fail!
(Sun Oct 14 17:49:32 2012) [sssd[nss]] [sss_parse_name_for_domains] (0x0200):
name 'foo' matched without domain, user is foo
It seems that although the uid is printed out as a signed integer, it is
compared with the max_id value as an unsigned integer.
** Affects: sssd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1066538
Title:
Problem with signed vs unsigned treatment of uid
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