[erlang-bugs] ssh2_msg_channel_failure

Ingela Anderton Andin <>
Tue Apr 24 14:52:24 CEST 2012


Hi!

Attila Rajmund Nohl wrote:
> Hello!
>
> Am I correct that this patch is not in R15B01?
>
>   

No this patch is not in R15B01, it will be in R15B02 I merged it today 
actually.


Regards Ingela Erlang/OTP team - Ericsson AB

> 2012/4/24 Ingela Anderton Andin <>:
>   
>> Hi!
>>
>> This might be a symptom of the "close race-condition"-bug  reported by
>> Daniel. The patch for that bug is
>>
>> diff --git a/lib/ssh/src/ssh_channel.erl b/lib/ssh/src/ssh_channel.erl
>> index 7b600ed..1938858 100644
>> --- a/lib/ssh/src/ssh_channel.erl
>> +++ b/lib/ssh/src/ssh_channel.erl
>> @@ -1,7 +1,7 @@
>> %%
>> %% %CopyrightBegin%
>> %%
>> -%% Copyright Ericsson AB 2008-2011. All Rights Reserved.
>> +%% Copyright Ericsson AB 2008-2012. All Rights Reserved.
>> %%
>> %% The contents of this file are subject to the Erlang Public License,
>> %% Version 1.1, (the "License"); you may not use this file except in
>> @@ -215,7 +215,7 @@ handle_info({ssh_cm, ConnectionManager, {closed,
>> ChannelId}},
>>                  close_sent = false} = State) ->
>>    %% To be on the safe side, i.e. the manager has already been terminated.
>>    (catch ssh_connection:close(ConnectionManager, ChannelId)),
>> -    {stop, normal, State};
>> +    {stop, normal, State#state{close_sent = true}};
>>
>> handle_info({ssh_cm, _, _} = Msg, #state{cm = ConnectionManager,
>>                       channel_cb = Module,
>> diff --git a/lib/ssh/src/ssh_connection_manager.erl
>> b/lib/ssh/src/ssh_connection_manager.erl
>> index e993f59..8c1f88e 100644
>> --- a/lib/ssh/src/ssh_connection_manager.erl
>> +++ b/lib/ssh/src/ssh_connection_manager.erl
>> @@ -384,9 +384,10 @@ handle_call({close, ChannelId}, _,
>>           #state{connection = Pid, connection_state =
>>                  #connection{channel_cache = Cache}} = State) ->
>>    case ssh_channel:cache_lookup(Cache, ChannelId) of
>> -       #channel{remote_id = Id} ->
>> +       #channel{remote_id = Id} = Channel ->
>>           send_msg({connection_reply, Pid,
>>                     ssh_connection:channel_close_msg(Id)}),
>> +           ssh_channel:cache_update(Cache, Channel#channel{sent_close =
>> true}),
>>           {reply, ok, State};
>>       undefined ->
>>           {reply, ok, State}
>>
>>
>> Regards Ingela Erlang/OTP  team - Ericsson AB
>>
>> Daniel Goertzen wrote:
>>     
>>> Under Putty Session->Logging can you turn on "SSH Packets" and post the
>>> log showing the error?
>>>
>>> Dan.
>>>
>>> On Sun, Apr 22, 2012 at 3:58 AM, Fyodor Ustinov <
>>> <mailto:>> wrote:
>>>
>>>    Hi!
>>>
>>>    Windows ssh client PuTTY show message  "Disconnected: Received
>>>    SSH2_MSG_CHANNEL_FAILURE for nonexistent channel 0" while working
>>>    with erlang ssh daemon.
>>>
>>>    Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:8:8]
>>>    [async-threads:0] [kernel-poll:false]
>>>
>>>    WBR,
>>>       Fyodor.
>>>
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