[ libssh2-Bugs-2825536 ] Double free or corruption of pointer on failed PW auth

Bugs item #2825536, was opened at 2009-07-22 22:23
Message generated for change (Comment added) made by bagder
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Category: misc
Group: None
>Status: Pending
>Resolution: Works For Me
Priority: 5
Private: No
Submitted By: Chris Adams (cmadams)
Assigned to: Daniel Stenberg (bagder)
Summary: Double free or corruption of pointer on failed PW auth

Initial Comment:
I have a perl script that uses libssh2 1.1 (via Net::SSH2) on Linux (RHEL 5 x86_64), and under some conditions, it crashes if it fails to authenticate (bad password) to a host with a glibc error:

*** glibc detected *** conf-sav.pl: fetching newtree/scn/sw1.bhmnoc: double free or corruption (!prev): 0x0000000002394820 ***

If I load it up in gdb with the libssh2 debuginfo installed, I see the crash in session.c at line 843:

        LIBSSH2_FREE(session, session->userauth_list_data);

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Comment By: Daniel Stenberg (bagder)
Date: 2009-07-28 19:31

Message:
Thanks for your help on improving libssh2!

We need more details on this bug entry to be able to sort it out properly,
and until more info is provided this entry will be set to 'pending' status
and will get closed automatically at a later date unless feedback has been
given.

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Comment By: Daniel Stenberg (bagder)
Date: 2009-07-22 22:56

Message:
Please provide a proper example in C that repeats this problem.

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You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=703942&aid=2825536&group_id=125852
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Received on 2009-07-28