So I have verified that firefox is doing the bind call with a 110 byte
long addrlen
[pid 1020] bind(18, {sa_family=AF_LOCAL, sun_path=@"google-nacl-
o1d1020-1"}, 110) = -1 EACCES (Permission denied)
so the trailing 0s being reported by the apparmor audit message are
correct
So this breaks down to 3 userspace bugs
wrong handling of \x00 by the compiler
wrong handling of the * and ** globs for abstract socket names
limited nesting depth for alternations (though this is minor and not really
needed for this bug if globbing is fixed)
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https://bugs.launchpad.net/bugs/1413410
Title:
Unable to match embedded NULLs in unix bind rule for abstract sockets
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