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[Troels Thomsen <troels@xxxxxxxxxx>]

Public bug reported:

I believe 2.11.1-0ubuntu7.14 (Ubuntu 10.04) introduces a regression in
`getaddrinfo`.

I'm using the test case from [Debian Bug
#304022](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=304022)
(attached as "main.c"). Valgrind detects a leak (output below) that
isn't detected if I'm downgrading to 2.11.1-0ubuntu7.13. Upgrading to
2.11.1-0ubuntu7.16 doesn't resolve this. However, I'm unable to
reproduce on 2.19-0ubuntu6.3 (Ubuntu 14.04).

(The host in the test case yields a NXDOMAIN, but this isn't significant; it seems 1 kB will be leaked per block in any case.)
    
    ==7== Memcheck, a memory error detector
    ==7== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
    ==7== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info
    ==7== Command: ./a.out
    ==7==
    ==7==
    ==7== HEAP SUMMARY:
    ==7==     in use at exit: 1,024 bytes in 1 blocks
    ==7==   total heap usage: 58 allocs, 57 frees, 9,893 bytes allocated
    ==7==
    ==7== 1,024 bytes in 1 blocks are definitely lost in loss record 1 of 1
    ==7==    at 0x4C274A8: malloc (vg_replace_malloc.c:236)
    ==7==    by 0x4EE7EC6: gaih_inet (getaddrinfo.c:858)
    ==7==    by 0x4EEA8F1: getaddrinfo (getaddrinfo.c:2425)
    ==7==    by 0x400606: main (in /tmp/a.out)
    ==7==
    ==7== LEAK SUMMARY:
    ==7==    definitely lost: 1,024 bytes in 1 blocks
    ==7==    indirectly lost: 0 bytes in 0 blocks
    ==7==      possibly lost: 0 bytes in 0 blocks
    ==7==    still reachable: 0 bytes in 0 blocks
    ==7==         suppressed: 0 bytes in 0 blocks
    ==7==
    ==7== For counts of detected and suppressed errors, rerun with: -v
    ==7== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 4 from 4)

** Affects: eglibc (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "Test case to reproduce"
   https://bugs.launchpad.net/bugs/1364584/+attachment/4193570/+files/main.c

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https://bugs.launchpad.net/bugs/1364584

Title:
  `getaddrinfo` leaks memory

Status in “eglibc” package in Ubuntu:
  New

Bug description:
  I believe 2.11.1-0ubuntu7.14 (Ubuntu 10.04) introduces a regression in
  `getaddrinfo`.

  I'm using the test case from [Debian Bug
  #304022](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=304022)
  (attached as "main.c"). Valgrind detects a leak (output below) that
  isn't detected if I'm downgrading to 2.11.1-0ubuntu7.13. Upgrading to
  2.11.1-0ubuntu7.16 doesn't resolve this. However, I'm unable to
  reproduce on 2.19-0ubuntu6.3 (Ubuntu 14.04).

  (The host in the test case yields a NXDOMAIN, but this isn't significant; it seems 1 kB will be leaked per block in any case.)
      
      ==7== Memcheck, a memory error detector
      ==7== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
      ==7== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info
      ==7== Command: ./a.out
      ==7==
      ==7==
      ==7== HEAP SUMMARY:
      ==7==     in use at exit: 1,024 bytes in 1 blocks
      ==7==   total heap usage: 58 allocs, 57 frees, 9,893 bytes allocated
      ==7==
      ==7== 1,024 bytes in 1 blocks are definitely lost in loss record 1 of 1
      ==7==    at 0x4C274A8: malloc (vg_replace_malloc.c:236)
      ==7==    by 0x4EE7EC6: gaih_inet (getaddrinfo.c:858)
      ==7==    by 0x4EEA8F1: getaddrinfo (getaddrinfo.c:2425)
      ==7==    by 0x400606: main (in /tmp/a.out)
      ==7==
      ==7== LEAK SUMMARY:
      ==7==    definitely lost: 1,024 bytes in 1 blocks
      ==7==    indirectly lost: 0 bytes in 0 blocks
      ==7==      possibly lost: 0 bytes in 0 blocks
      ==7==    still reachable: 0 bytes in 0 blocks
      ==7==         suppressed: 0 bytes in 0 blocks
      ==7==
      ==7== For counts of detected and suppressed errors, rerun with: -v
      ==7== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 4 from 4)

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