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userauth: fill in missing error path when agent goes away.

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If the agent client code doesn't even manage to read a full response
message at all (for example, because the agent it's talking to is
Pageant running in debug mode and you just ^Ced it or it crashed,
which is what's been happening to me all afternoon), then previously,
the userauth code would loop back round to the top of the main loop
without having actually sent any request, so the client code would
deadlock waiting for a response to nothing.

(cherry picked from commit 563cb062b8)
This commit is contained in:
Simon Tatham 2020-02-02 18:53:24 +00:00
parent 6864bcddbb
commit 35cc7b1cb6
1 changed files with 7 additions and 0 deletions
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7
ssh2userauth.c
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@ -784,6 +784,13 @@ static void ssh2_userauth_process_queue(PacketProtocolLayer *ppl)
s->suppress_wait_for_response_packet = true;
ssh_free_pktout(s->pktout);
}
} else {
ppl_logevent("Pageant failed to respond to "
"signing request");
ppl_printf("Pageant failed to "
"respond to signing request\r\n");
s->suppress_wait_for_response_packet = true;
ssh_free_pktout(s->pktout);
}
}