R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb84ffc16d4 R13: 00000000004c81fc R14: 00000000004de220 R15: 0000000000000006 batman_adv: batadv0: Adding interface: veth1_to_team ------------[ cut here ]------------ batman_adv: batadv0: The MTU of interface veth1_to_team 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. WARNING: CPU: 0 PID: 303 at net/batman-adv/bat_iv_ogm.c:555 batadv_iv_send_outstanding_bat_ogm_packet+0x5dc/0x770 net/batman-adv/bat_iv_ogm.c:1785 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 303 Comm: kworker/u4:3 Not tainted 4.14.170-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xf7/0x13b lib/dump_stack.c:58 panic+0x1b0/0x358 kernel/panic.c:183 __warn.cold.8+0x25/0x2c kernel/panic.c:547 report_bug+0x1a4/0x1f3 lib/bug.c:186 batman_adv: batadv0: Interface activated: veth1_to_team fixup_bug arch/x86/kernel/traps.c:177 [inline] do_error_trap+0x1bd/0x310 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963 RIP: 0010:batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:555 [inline] RIP: 0010:batadv_iv_send_outstanding_bat_ogm_packet+0x5dc/0x770 net/batman-adv/bat_iv_ogm.c:1797 RSP: 0018:ffff8880a9677ce8 EFLAGS: 00010286 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 RAX: ffff888096d64d40 RBX: ffff888091873b88 RCX: 1ffff110128e95ad RDX: 0000000000000000 RSI: ffffffff87990fa0 RDI: ffff88809474ad68 RBP: ffff8880a9677d60 R08: ffff8880a969af08 R09: 0000000000002bbd R10: 0000000000000028 R11: ffff8880a969a640 R12: ffff88808bb7d2c0 R13: ffff888091873b40 R14: ffff88809474ad00 R15: ffff888091873c28 process_one_work+0x79e/0x16c0 kernel/workqueue.c:2114 worker_thread+0xcc/0xee0 kernel/workqueue.c:2248 kthread+0x338/0x400 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 CPU: 1 PID: 7264 Comm: syz-executor.2 Not tainted 4.14.170-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xf7/0x13b lib/dump_stack.c:58 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.3+0x105/0x14b lib/fault-inject.c:149 should_failslab+0xba/0xf0 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3297 [inline] kmem_cache_alloc_node+0x287/0x790 mm/slab.c:3640 __alloc_skb+0x92/0x500 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:980 [inline] nlmsg_new include/net/netlink.h:511 [inline] rtmsg_ifinfo_build_skb+0x68/0x120 net/core/rtnetlink.c:2908 rtmsg_ifinfo_event.part.27+0x16/0xb0 net/core/rtnetlink.c:2942 rtmsg_ifinfo_event net/core/rtnetlink.c:4366 [inline] rtnetlink_event+0xc2/0x110 net/core/rtnetlink.c:4359 notifier_call_chain+0xd6/0x150 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x11/0x20 kernel/notifier.c:401 call_netdevice_notifiers_info+0x4b/0x60 net/core/dev.c:1671 __netdev_upper_dev_link+0x18e/0x1f0 net/core/dev.c:6323 netdev_master_upper_dev_link+0x14/0x20 net/core/dev.c:6371 batadv_hardif_enable_interface+0x1af/0x990 net/batman-adv/hard-interface.c:741 batadv_softif_slave_add+0x82/0xe0 net/batman-adv/soft-interface.c:889 do_set_master+0x163/0x1f0 net/core/rtnetlink.c:1961 do_setlink+0x9dd/0x2c50 net/core/rtnetlink.c:2098 rtnl_newlink+0xe0c/0x1390 net/core/rtnetlink.c:2660 rtnetlink_rcv_msg+0x34f/0x9d0 net/core/rtnetlink.c:4315 netlink_rcv_skb+0x133/0x370 net/netlink/af_netlink.c:2432 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:4327 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x40d/0x5f0 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x730/0xbd0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:656 ___sys_sendmsg+0x625/0x920 net/socket.c:2062 __sys_sendmsg+0xc1/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0xd/0x20 net/socket.c:2103 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459ef9 RSP: 002b:00007ff9065b3c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff9065b3c90 RCX: 0000000000459ef9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff9065b46d4 R13: 00000000004c81fc R14: 00000000004de220 R15: 0000000000000006 Kernel Offset: disabled Rebooting in 86400 seconds..