IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready 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! ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:104! 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! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8093 Comm: syz-executor.2 Not tainted 4.19.99-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_panic+0x17c/0x17e net/core/skbuff.c:104 Code: 4c 8b 4d b8 8b 8b 80 00 00 00 41 57 45 89 f0 4c 89 ea ff 75 d0 4c 89 e6 48 c7 c7 00 cc 49 88 ff 75 c8 ff 75 c0 e8 cb 0d 94 fb <0f> 0b e8 60 aa a9 fb 4c 8b 6d 08 e8 f7 30 e1 fb 48 c7 c1 c0 d5 49 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 RSP: 0018:ffff88807704ed40 EFLAGS: 00010282 RAX: 0000000000000087 RBX: ffff88808c034940 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81557a66 RDI: ffffed100ee09d9a RBP: ffff88807704eda8 R08: 0000000000000087 R09: ffffed1015d25079 R10: ffffed1015d25078 R11: ffff8880ae9283c7 R12: ffffffff8849d600 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! R13: ffffffff8677a878 R14: 0000000000000048 R15: ffffffff8849cbc0 FS: 00007f110cd3f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4ac8dae000 CR3: 00000000814bd000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic net/core/skbuff.c:109 [inline] skb_put.cold+0x23/0x23 net/core/skbuff.c:1702 skb_put_zero include/linux/skbuff.h:2101 [inline] dump_ah_combs net/key/af_key.c:2961 [inline] pfkey_send_acquire+0x1288/0x2600 net/key/af_key.c:3224 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! km_query+0xcb/0x210 net/xfrm/xfrm_state.c:1990 IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready xfrm_state_find+0x1edd/0x2fc0 net/xfrm/xfrm_state.c:1040 batman_adv: batadv0: Interface activated: batadv_slave_1 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1413 [inline] xfrm_tmpl_resolve+0x333/0xcf0 net/xfrm/xfrm_policy.c:1458 xfrm_resolve_and_create_bundle+0x137/0x22f0 net/xfrm/xfrm_policy.c:1756 xfrm_lookup_with_ifid+0x27a/0x1d60 net/xfrm/xfrm_policy.c:2079 xfrm_lookup net/xfrm/xfrm_policy.c:2203 [inline] xfrm_lookup_route+0x3b/0x1f0 net/xfrm/xfrm_policy.c:2214 ip6_dst_lookup_flow+0x189/0x220 net/ipv6/ip6_output.c:1086 rawv6_sendmsg+0xc15/0x3620 net/ipv6/raw.c:931 inet_sendmsg+0x141/0x5d0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ___sys_sendmsg+0x3e2/0x920 net/socket.c:2115 __sys_sendmmsg+0x1bf/0x4e0 net/socket.c:2210 __do_sys_sendmmsg net/socket.c:2239 [inline] __se_sys_sendmmsg net/socket.c:2236 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2236 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b349 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f110cd3ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f110cd3f6d4 RCX: 000000000045b349 RDX: 0400000000000058 RSI: 0000000020007e00 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008ca R14: 00000000004ca1f6 R15: 000000000075bf2c Modules linked in: IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready ---[ end trace c3e51167cf33c13b ]--- RIP: 0010:skb_panic+0x17c/0x17e net/core/skbuff.c:104 Code: 4c 8b 4d b8 8b 8b 80 00 00 00 41 57 45 89 f0 4c 89 ea ff 75 d0 4c 89 e6 48 c7 c7 00 cc 49 88 ff 75 c8 ff 75 c0 e8 cb 0d 94 fb <0f> 0b e8 60 aa a9 fb 4c 8b 6d 08 e8 f7 30 e1 fb 48 c7 c1 c0 d5 49 RSP: 0018:ffff88807704ed40 EFLAGS: 00010282 RAX: 0000000000000087 RBX: ffff88808c034940 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81557a66 RDI: ffffed100ee09d9a RBP: ffff88807704eda8 R08: 0000000000000087 R09: ffffed1015d25079 R10: ffffed1015d25078 R11: ffff8880ae9283c7 R12: ffffffff8849d600 R13: ffffffff8677a878 R14: 0000000000000048 R15: ffffffff8849cbc0 FS: 00007f110cd3f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd7bff8fd8 CR3: 00000000814bd000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400