Bug 204122 - getnameinfo() does not return EAI_AGAIN when name servers are down
getnameinfo() does not return EAI_AGAIN when name servers are down
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: glibc (Show other bugs)
i686 Linux
medium Severity medium
: ---
: ---
Assigned To: Jakub Jelinek
Brian Brock
: Reopened
Depends On:
  Show dependency treegraph
Reported: 2006-08-25 14:30 EDT by Jordan Russell
Modified: 2007-11-16 20:14 EST (History)
0 users

See Also:
Fixed In Version: RHBA-2007-0210
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-05-01 19:06:34 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Test program (540 bytes, text/plain)
2006-08-25 14:30 EDT, Jordan Russell
no flags Details

  None (edit)
Description Jordan Russell 2006-08-25 14:30:12 EDT
Created attachment 134947 [details]
Test program
Comment 1 Jordan Russell 2006-08-25 14:30:12 EDT
Description of problem:
getnameinfo() does not return EAI_AGAIN when the name servers specified in
/etc/resolv.conf are down. Instead it returns EAI_NONAME, which implies that the
lookup was successful but the record didn't exist.

This causes Postfix to bounce mail when it shouldn't. See:

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Set /etc/resolv.conf to point to an IP address that isn't running a name
server (e.g. "nameserver")
2. Run the attached program.
Actual results:
getnameinfo() failed with code -2   (EAI_NONAME)

Expected results:
getnameinfo() failed with code -3   (EAI_AGAIN)

Additional info:
getaddrinfo() once had a similar bug; see #15100
Comment 2 Jakub Jelinek 2006-08-29 02:42:58 EDT
Should be fixed in glibc-2.4.90-26.
Comment 3 RHEL Product and Program Management 2006-08-29 02:45:54 EDT
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
Comment 9 Red Hat Bugzilla 2007-05-01 19:06:34 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


Note You need to log in before you can comment on or make changes to this bug.