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From "Goldstein Lyor (Jira)" <j...@apache.org>
Subject [jira] [Commented] (SSHD-938) SSH sessions being closed with invalid packet length
Date Mon, 26 Aug 2019 13:05:00 GMT

    [ https://issues.apache.org/jira/browse/SSHD-938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16915779#comment-16915779
] 

Goldstein Lyor commented on SSHD-938:
-------------------------------------

Sorry, nothing comes to mind - like I said, since 0.13.0 we did a +lot+ of work and code changes
- a respectable part of it around sessions, channels, packets etc.... The phenomenon described
in this issue does not strike any familiar chord. I recommend perhaps searching older SSHD
issues for something similar (perhaps not for version 0.13 though..)

> SSH sessions being closed with invalid packet length
> ----------------------------------------------------
>
>                 Key: SSHD-938
>                 URL: https://issues.apache.org/jira/browse/SSHD-938
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 0.13.0
>            Reporter: Anudeep
>            Assignee: Goldstein Lyor
>            Priority: Blocker
>         Attachments: server.7z
>
>
> SSH connections are being closed with invalid packet length and TCP connection goes into
CLOSE_WAIT state and once CLOSE_WAIT state count crosses 4 no more SSH connection is being
allowed.
> with SSHD-core-0.13.0
>  
> Below is the error
> 2019-08-22 09:53:29,106 INFO  [org.apache.sshd.server.session.ServerSession] (sshd-SshServer[6162dce4]-nio2-thread-2)
Error decoding packet (invalid length) a5 5f 74 5f a6 6f ea 41 02 c0 0a 54 83 22 e4 77 53
7d 0d b9 25 de 36 1d 07 cb cd 43 66 95 51 b2 72 54 d5 4e 2d 0a d5 17 f4 5e 81 4d 6a b8 ab
f7 00 bf 4d 40 f5 56 b7 61 9b 8a be fe 54 d4 89 a2 c5 07 3c de 25 95 44 18 4f 90 dc aa 5b
de 40 85 71 12 cc f6 c0 34 8d 0e 75 95 a5 5b 8d f6 b9 f6 94 04 d8 b5 25 5c d5 58 06 d1 82
68 13 2f 4c a0 ee 78 6b 20 97 52 2d 93 4c 88 bc 17 53 ca eb 34 23 c1 c6 1e 5a f9 31 e7 52
f9 ef 88 03 de e8 af ba 11 5e 97 50 1e c2 26 ba 80 34 55 3f 38 49 0c a9 80 8c a3 fe 6f b6
b6 5d 45 41 e9 e0 e6 d5 15 d6 44 f8 c42019-08-22 09:53:29,106 INFO  [org.apache.sshd.server.session.ServerSession]
(sshd-SshServer[6162dce4]-nio2-thread-2) Error decoding packet (invalid length) a5 5f 74 5f
a6 6f ea 41 02 c0 0a 54 83 22 e4 77 53 7d 0d b9 25 de 36 1d 07 cb cd 43 66 95 51 b2 72 54
d5 4e 2d 0a d5 17 f4 5e 81 4d 6a b8 ab f7 00 bf 4d 40 f5 56 b7 61 9b 8a be fe 54 d4 89 a2
c5 07 3c de 25 95 44 18 4f 90 dc aa 5b de 40 85 71 12 cc f6 c0 34 8d 0e 75 95 a5 5b 8d f6
b9 f6 94 04 d8 b5 25 5c d5 58 06 d1 82 68 13 2f 4c a0 ee 78 6b 20 97 52 2d 93 4c 88 bc 17
53 ca eb 34 23 c1 c6 1e 5a f9 31 e7 52 f9 ef 88 03 de e8 af ba 11 5e 97 50 1e c2 26 ba 80
34 55 3f 38 49 0c a9 80 8c a3 fe 6f b6 b6 5d 45 41 e9 e0 e6 d5 15 d6 44 f8 c42019-08-22 09:53:29,106
DEBUG [org.apache.sshd.common.io.nio2.Nio2Session] (sshd-SshServer[6162dce4]-nio2-thread-2)
Caught exception, now calling handler2019-08-22 09:53:29,106 WARN  [org.apache.sshd.server.session.ServerSession]
(sshd-SshServer[6162dce4]-nio2-thread-2) Exception caught: org.apache.sshd.common.SshException:
Invalid packet length: -16976455 at org.apache.sshd.common.session.AbstractSession.decode(AbstractSession.java:677)
[sshd-core-0.13.0.jar:0.13.0] at org.apache.sshd.common.session.AbstractSession.messageReceived(AbstractSession.java:283)
[sshd-core-0.13.0.jar:0.13.0] at org.apache.sshd.common.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:54)
[sshd-core-0.13.0.jar:0.13.0] at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:184)
[sshd-core-0.13.0.jar:0.13.0] at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:170)
[sshd-core-0.13.0.jar:0.13.0] at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$1.run(Nio2CompletionHandler.java:32)
[sshd-core-0.13.0.jar:0.13.0] at java.security.AccessController.doPrivileged(Native Method)
[rt.jar:1.8.0_172] at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:30)
[sshd-core-0.13.0.jar:0.13.0] at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126) [rt.jar:1.8.0_172]
at sun.nio.ch.Invoker$2.run(Invoker.java:218) [rt.jar:1.8.0_172] at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
[rt.jar:1.8.0_172] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[rt.jar:1.8.0_172]



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