[Bug libc/9954] New: getaddrinfo assertion triggered without reason

[Bug libc/9954] New: getaddrinfo assertion triggered without reason

[aurelien at aurel32 dot net]

With the following /etc/hosts:
127.0.0.1       www.my-domain.es
127.0.1.1       www.my-domain.es
192.168.0.1     www.my-domain.es

Using getaddrinfo() on www.my-domain.es, trigger the following assertion:
../sysdeps/posix/getaddrinfo.c:1473: rfc3484_sort: Assertion 
`src->results[i].native == -1 || src->results[i].native == a1_native' failed.

This is due to two different bugs:
- In rfc3484_sort() rule 7, src->results[i].native is assigned even if 
src->results[i].index is -1, meaning that no interface is associated.
- In getaddrinfo() the source IP address used with the lo interface needs a 
special case, as it can be any IP within 127.X.Y.Z.

Patch fixing both problems will follow shortly.

-- 
           Summary: getaddrinfo assertion triggered without reason
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: aurelien at aurel32 dot net
                CC: glibc-bugs at sources dot redhat dot com
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=9954

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[Bug libc/9954] getaddrinfo assertion triggered without reason

[aurelien at aurel32 dot net]

------- Additional Comments From aurelien at aurel32 dot net  2009-03-15 15:32 -------
Created an attachment (id=3822)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=3822&action=view)
Patch to fix the problem.


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[Bug libc/9954] getaddrinfo assertion triggered without reason

[drepper at redhat dot com]

------- Additional Comments From drepper at redhat dot com  2009-03-15 18:39 -------
None of the change should be needed.

None of the known interfaces should have the index -1 and hence the test should
be unnecessary.  If this is not the case there is a problem elsewhere and you're
hiding it with the change.

For the deprecated addresses the same, the problem is in the configuration and
you're hiding it.

And no, I cannot reproduce any problem with the information you provide.  You
have to be much more detailed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING


http://sourceware.org/bugzilla/show_bug.cgi?id=9954

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[Bug libc/9954] getaddrinfo assertion triggered without reason

[aurelien at aurel32 dot net]

------- Additional Comments From aurelien at aurel32 dot net  2009-03-15 20:19 -------
> None of the known interfaces should have the index -1 and hence the test
> should be unnecessary.  If this is not the case there is a problem elsewhere
> and you're hiding it with the change.

Entries in /etc/hosts corresponding to IP 127.X.Y.Z, while being different than 
127.0.0.1 are getting index -1, thus triggerring the problem.

-- 


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[Bug libc/9954] getaddrinfo assertion triggered without reason

[aurelien at aurel32 dot net]

------- Additional Comments From aurelien at aurel32 dot net  2009-03-15 20:49 -------
Created an attachment (id=3823)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=3823&action=view)
testcase


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http://sourceware.org/bugzilla/show_bug.cgi?id=9954

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[Bug libc/9954] getaddrinfo assertion triggered without reason

[aurelien at aurel32 dot net]

------- Additional Comments From aurelien at aurel32 dot net  2009-03-15 20:50 -------
Created an attachment (id=3824)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=3824&action=view)
/etc/host.conf for testcase


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[Bug libc/9954] getaddrinfo assertion triggered without reason

[aurelien at aurel32 dot net]

------- Additional Comments From aurelien at aurel32 dot net  2009-03-15 20:51 -------
Created an attachment (id=3825)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=3825&action=view)
/etc/hosts for testcase


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[Bug libc/9954] getaddrinfo assertion triggered without reason

[list at phuk dot ath dot cx]

------- Additional Comments From list at phuk dot ath dot cx  2009-07-17 18:13 -------
I'm also hitting this and it seems to be due to conflicts between /etc/hosts and
DNS. I've removed everything but localhost from /etc/hosts, and now everything
seems fine. However, this "assertion failed" message is very unclear. It's very
hard to find out what's actually causing it because there's not even the
slightest hint of what we are actually talking about. What is src, what's the
meaning of the results field, what is a1_native...?
Providing just a *little* bit of context would greatly ease the debugging of
this. Right now, the only option of getting *some rough* idea of what this
assertion actually means is reading the code, which is obiously very
time-consuming for anyone not familiar glibc internals.

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[Bug libc/9954] getaddrinfo assertion triggered without reason

[pasky at suse dot cz]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
   Last reconfirmed|0000-00-00 00:00:00         |2010-06-01 03:44:20
               date|                            |


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