Re: session establishment struck

[Aris Adamantiadis <aris@xxxxxxxxxxxx>]

Hi,

I see this is a thread dump - Do you follow the best practices for
handling threads within libssh [1] ?

Do this happen every time or on a small fraction of the time ? What is
your environment/cpu (I guess some kind of linux on x64)?
Do you do several launches of ssh connections at same time ?

I must say this looks very strange because your stacktrace lies right
into malloc... Do you do some strange threading (using an other
threading lib than libpthread ?)

Kr,

Aris

[1] http://api.libssh.org/master/libssh_tutor_threads.html
Le 25/08/12 01:17, Vasuki Gubbi a écrit :
> Hi,
> 
> I am trying to connect using SSH and I see that my thread is struck for
> ever and does not return. I am attaching the thread dump below. Please
> let me know if there is an issue?
> 
> 
> #0  0x0000003ab2ef619e in __lll_lock_wait_private () from /lib64/libc.so.6
> #1  0x0000003ab2e7c1d8 in _L_lock_9165 () from /lib64/libc.so.6
> #2  0x0000003ab2e79ad2 in malloc () from /lib64/libc.so.6
> #3  0x0000003ab2e6fd9b in __libc_message () from /lib64/libc.so.6
> #4  0x0000003ab2e75716 in malloc_printerr () from /lib64/libc.so.6
> #5  0x0000003ab2e78e58 in _int_malloc () from /lib64/libc.so.6
> #6  0x0000003ab2e79add in malloc () from /lib64/libc.so.6
> #7  0x0000003ab9e5d84e in CRYPTO_malloc () from /usr/lib64/libcrypto.so.6
> #8  0x0000003ab9eb92c7 in EVP_DigestInit_ex () from
> /usr/lib64/libcrypto.so.6
> #9  0x0000003ab9e6a556 in HMAC_Init_ex () from /usr/lib64/libcrypto.so.6
> #10 0x00007fbe66f08ed5 in hmac_init () from
> /NS1500/netsmart8.0/lib/libssh.so.4
> #11 0x00007fbe66ef3a5d in packet_encrypt () from
> /NS1500/netsmart8.0/lib/libssh.so.4
> #12 0x00007fbe66f0380f in packet_send2 () from
> /NS1500/netsmart8.0/lib/libssh.so.4
> #13 0x00007fbe66f038f5 in packet_send () from
> /NS1500/netsmart8.0/lib/libssh.so.4
> #14 0x00007fbe66ef0a0c in ssh_service_request () from
> /NS1500/netsmart8.0/lib/libssh.so.4
> #15 0x00007fbe66ee5113 in ask_userauth () from
> /NS1500/netsmart8.0/lib/libssh.so.4
> #16 0x00007fbe66ee57fa in ssh_userauth_none () from
> /NS1500/netsmart8.0/lib/libssh.so.4
> #17 0x00007fbe66ee6e1c in ssh_userauth_autopubkey () from
> /NS1500/netsmart8.0/lib/libssh.so.4
> 
> Regards,
> Vasuki