[pkg-gnupg-maint] Bug#841143: Bug#841143: Suspected race in gpg1 to gpg2 conversion or agent startup

[Ian Jackson]

I have been digging in the code.  I found it very difficult to get any
useful debug logging out.  Some patches to maybe help with that will
follow, but I am still stumped as to get debugging output from
gpg-agent.  I tried making a stunt shell script to pass --debug-all
--no-detach and redirect stderr somewhere, but it is ineffective for
some reason.

Nevertheless, I have discovered a possible explanation for the bug.

The variable `active_connectionis' in gpg-agent.c seems to be updated
by multiple threads without any locking.  If it were to get corrupted,
I think gpg-agent might get stuck trying to exit, with clients which
had successfully connected at the syscall level.

Ian.

-- 
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