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batman-adv-v15: double fragmentation issue (formerly: mow/mol issue) #435
batman-adv v15 does not correctly handle fragmentated packets when forwarding them through links requiring even more fragmentation, i.e. a 1500 byte packet is fragmented to fit within an MTU of 1400 and forwarded over a link with an MTU of 1300. In this case batman-adv v15 does not fragment the already fragmented packets to match the lower MTU but instead tries to send a too large packet through link causing that packet to be dropped.
Script for reproducing this problem: https://gist.github.com/tcatm/1832c8e4fb6198f0adb3