[libssh2] #220: agent_list_identities pointer to out of scope variable

#220: agent_list_identities pointer to out of scope variable
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  Reporter: madwizard.myopenid.com | Owner:
      Type: defect | Status: new
  Priority: normal | Milestone: 1.2.9
 Component: API | Version: 1.2.8
  Keywords: | Blocks:
Blocked By: |
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 In the windows version compiled with visual studio (I used 64-bit but
 32-bit probably has the same problem) libssh2_agent_list_identitites may
 fail with LIBSSH2_ERROR_BAD_USE / "illegal agent request" even when used
 properly. I have tracked down the problem to agent_list_identities in
 agent.c where transctx->request is set as a pointer to a local uchar
 variable 'c' containing SSH2_AGENTC_REQUEST_IDENTITIES. The scope of this
 variable is the if-statement but the pointer will be used after the if
 statement and may be overwritten with other data placed on the stack. The
 problem was fixed by placing the local variable at the top of the function
 rather than in the if statement.

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Ticket URL: <http://trac.libssh2.org/ticket/220>
libssh2 <http://trac.libssh2.org/>
C library for writing portable SSH2 clients
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