IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready skbuff: skb_over_panic: text:ffffffff864f820d len:232 put:72 head:ffff8880a1587a00 data:ffff8880a1587a00 tail:0xe8 end:0xc0 dev: batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:104! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 invalid opcode: 0000 [#1] PREEMPT SMP KASAN batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! Modules linked in: CPU: 1 PID: 9343 Comm: syz-executor.5 Not tainted 4.14.284-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808f6f4480 task.stack: ffff88808f5a8000 RIP: 0010:skb_panic+0x172/0x174 net/core/skbuff.c:104 RSP: 0018:ffff88808f5af1c8 EFLAGS: 00010282 IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_0 RAX: 0000000000000086 RBX: ffff8880a1586b40 RCX: 0000000000000000 IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready RDX: 0000000000000000 RSI: ffffffff878bc800 RDI: ffffed1011eb5e2f device veth0_macvtap entered promiscuous mode RBP: ffffffff8855bb20 R08: 0000000000000086 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff864f820d R13: 0000000000000048 R14: ffffffff8855b380 R15: 00000000000000c0 FS: 00007f676b2fd700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005600fd55cd28 CR3: 00000000a1ae5000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready Call Trace: skb_over_panic net/core/skbuff.c:109 [inline] skb_put.cold+0x24/0x24 net/core/skbuff.c:1708 dump_esp_combs net/key/af_key.c:3014 [inline] pfkey_send_acquire+0x161d/0x2360 net/key/af_key.c:3235 device veth1_macvtap entered promiscuous mode km_query+0xa9/0x1b0 net/xfrm/xfrm_state.c:1984 IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready xfrm_state_find+0x1847/0x27c0 net/xfrm/xfrm_state.c:1026 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1385 [inline] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:1429 [inline] xfrm_resolve_and_create_bundle+0x29b/0x2630 net/xfrm/xfrm_policy.c:1721 IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! xfrm_lookup+0x1ee/0x1790 net/xfrm/xfrm_policy.c:2031 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_0 xfrm_lookup_route+0x33/0x1b0 net/xfrm/xfrm_policy.c:2150 ip_route_output_flow+0xf9/0x130 net/ipv4/route.c:2630 udp_sendmsg+0x13b3/0x1c80 net/ipv4/udp.c:1025 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762 batman_adv: batadv0: Interface activated: batadv_slave_1 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x326/0x800 net/socket.c:2062 __sys_sendmmsg+0x129/0x330 net/socket.c:2152 SYSC_sendmmsg net/socket.c:2183 [inline] SyS_sendmmsg+0x2f/0x50 net/socket.c:2178 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f676bba9109 RSP: 002b:00007f676b2fd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f676bcbc030 RCX: 00007f676bba9109 RDX: 0400000000000354 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007f676bc0305d R08: 0000000000000000 R09: 0000000000000000 R10: 000002873dedf99c R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff619a559f R14: 00007f676b2fd300 R15: 0000000000022000 Code: 8b 4c 24 10 8b 8b 80 00 00 00 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 c0 b3 55 88 ff 74 24 10 ff 74 24 20 e8 04 6b e4 ff <0f> 0b e8 78 ac 36 fa 4c 8b 64 24 18 e8 2e 4e 60 fa 48 c7 c1 e0 RIP: skb_panic+0x172/0x174 net/core/skbuff.c:104 RSP: ffff88808f5af1c8 IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready ---[ end trace 2f30e3833982fba4 ]--- IPv6: ADDRCONF(NETDEV_UP): veth1_virt_wifi: link is not ready