batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
1970/01/01 00:01:51 SYZFATAL: executor 2 failed 11 times: failed to create temp dir: mkdir ./syzkaller-testdir2715098857: no space left on device