openssh bugs - Dec 2012 - [Bug 2052] New: Memory leak when SSH login and logout

https://bugzilla.mindrot.org/show_bug.cgi?id=2052

            Bug ID: 2052
           Summary: Memory leak when SSH login and logout
    Classification: Unclassified
           Product: Portable OpenSSH
           Version: 6.1p1
          Hardware: MIPS
                OS: Linux
            Status: NEW
          Severity: major
          Priority: P5
         Component: sshd
          Assignee: unassigned-bugs at mindrot.org
          Reporter: vijay.m at aricent.com

Created attachment 2200
  --> https://bugzilla.mindrot.org/attachment.cgi?id=2200&action=edit
Memory allocation and deallocation information

We are using openSSH version release-5.1.
When we do ssh login and logout we notice memory leak, we noticed this
memory leak in the following functions.

1, match_list (from Line no 287) function allocated memory using
xstrdup call and this was not freeed.

2, In function input_userauth_request(from line no 299) we allocate
memory using xstrdup call and this was not freeed.

3, In Function list_hostkey_types (from line no 825) we allocate memory
using xstrdup call and this was not freeed.

4, In function kex_setup (line no : 246) we allocate memory using
buffer_init call and this was not freeed.

5, In Function channel_new (line no :332) allocate memory using xstrdup
call and this was not freeed.

6, In function channel_new (line no:317) we allocate memory using
buffer_init call and this was not freeed.

If this issue was fixed in the later release, can you please help us
with the patch.
I am attaching the logs for you reference.

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--- Comment #1 from vijay <vijay.m at aricent.com> ---
Created attachment 2201
  --> https://bugzilla.mindrot.org/attachment.cgi?id=2201&action=edit
functions allocating and deallocating memory.

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Darren Tucker <dtucker at zip.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dtucker at zip.com.au
             Blocks|                            |2076

--- Comment #2 from Darren Tucker <dtucker at zip.com.au> ---
We can take a look, however since the sshd process goes away once the
session is complete the OS should return all resources allocated by the
process.

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |2130

--- Comment #3 from Damien Miller <djm at mindrot.org> ---
Retarget to openssh-6.4

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|2076                        |

--- Comment #4 from Damien Miller <djm at mindrot.org> ---
Retarget 6.3 -> 6.4

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |2188

--- Comment #5 from Damien Miller <djm at mindrot.org> ---
Retarget incomplete bugs / feature requests to 6.6 release

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|2130                        |

--- Comment #6 from Damien Miller <djm at mindrot.org> ---
Retarget incomplete bugs / feature requests to 6.6 release

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |2226

--- Comment #7 from Damien Miller <djm at mindrot.org> ---
Retarget to 6.7 release, since 6.6 was mostly bugfixing.

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|2188                        |

--- Comment #8 from Damien Miller <djm at mindrot.org> ---
Remove from 6.6 tracking bug

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |2266

--- Comment #9 from Damien Miller <djm at mindrot.org> ---
Retarget incomplete bugs to 6.8 release.

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|2226                        |

--- Comment #10 from Damien Miller <djm at mindrot.org> ---
These bugs are no longer targeted at the imminent 6.7 release

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|2266                        |

--- Comment #11 from Damien Miller <djm at mindrot.org> ---
OpenSSH 6.8 is approaching release and closed for major work. Retarget
these bugs for the next release.

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |2360

--- Comment #12 from Damien Miller <djm at mindrot.org> ---
Retarget to 6.9

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|2360                        |
                 CC|                            |djm at mindrot.org

--- Comment #13 from Damien Miller <djm at mindrot.org> ---
detarget for 6.9 release, until we do the massive valgrind memleak
cleanup

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #14 from Damien Miller <djm at mindrot.org> ---
closing a very stale bug. We've done a fair bit of work on leaks since
2012. If you have a more recent report then feel free to reopen

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #15 from Damien Miller <djm at mindrot.org> ---
closing bugs resolved before openssh-8.9

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