talloc is LGPL v2
The ccan version http://ccan.ozlabs.org/info/talloc.html says it is based upon svn://svnanon.samba.org/samba/branches/SAMBA_4_0/source/lib/talloc revision 23158 , and is LGPLv2.
I believe http://talloc.samba.org/talloc/doc/html/talloc_8h_source.htm... is the latest version, 2.0.5 from 10-Jan-2011. That version does appear to be LGPLv3.
(Note that both appear to have the "or (at your option) any later version" clause, but that's largely irrelevant in this case.)