IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready napi 0 already in hash table old xdp 0 nr rx queue 1 queue 0 reg 0 list_add double add: new=ffff88807d2ac160, prev=ffff88807b82e050, next=ffff88807d2ac160. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:29! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 10964 Comm: syz-executor.2 Not tainted 5.15.0-rc4-next-20211008-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 Code: b1 24 c3 fa 4c 89 e1 48 c7 c7 60 56 04 8a e8 f2 8c f1 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 a0 57 04 8a e8 db 8c f1 ff <0f> 0b 48 89 f1 48 c7 c7 20 57 04 8a 4c 89 e6 e8 c7 8c f1 ff 0f 0b RSP: 0018:ffffc90002ddeb40 EFLAGS: 00010282 RAX: 0000000000000058 RBX: 0000000000000040 RCX: 0000000000000000 RDX: ffff888018450000 RSI: ffffffff815e0d78 RDI: fffff520005bbd5a RBP: ffff88807d2ac160 R08: 0000000000000058 R09: 0000000000000000 R10: ffffffff815dab5e R11: 0000000000000000 R12: ffff88807d2ac160 R13: ffff88807d2ac000 R14: ffff88807d2ac160 R15: ffff88807d2ac160 FS: 00007f6aeb1db700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000004 CR3: 0000000068f0d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add_rcu include/linux/rculist.h:79 [inline] list_add_rcu include/linux/rculist.h:106 [inline] netif_napi_add+0x3fd/0x9c0 net/core/dev.c:6889 veth_enable_xdp_range+0x195/0x350 drivers/net/veth.c:1017 veth_enable_xdp+0x2ab/0x630 drivers/net/veth.c:1072 veth_xdp_set drivers/net/veth.c:1492 [inline] veth_xdp+0x4d7/0x790 drivers/net/veth.c:1532 dev_xdp_install+0xd5/0x270 net/core/dev.c:9365 dev_xdp_attach+0x83d/0x1010 net/core/dev.c:9513 dev_change_xdp_fd+0x246/0x300 net/core/dev.c:9753 do_setlink+0x2fb4/0x3970 net/core/rtnetlink.c:2931 rtnl_group_changelink net/core/rtnetlink.c:3242 [inline] __rtnl_newlink+0xc06/0x1750 net/core/rtnetlink.c:3396 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3506 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5572 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2491 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x86d/0xda0 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f6aeba648d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6aeb1db188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f6aebb68f60 RCX: 00007f6aeba648d9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007f6aebabecb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb8cec5ff R14: 00007f6aeb1db300 R15: 0000000000022000 Modules linked in: ---[ end trace 11e4d9f710e460c3 ]--- RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29 Code: b1 24 c3 fa 4c 89 e1 48 c7 c7 60 56 04 8a e8 f2 8c f1 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 a0 57 04 8a e8 db 8c f1 ff <0f> 0b 48 89 f1 48 c7 c7 20 57 04 8a 4c 89 e6 e8 c7 8c f1 ff 0f 0b RSP: 0018:ffffc90002ddeb40 EFLAGS: 00010282 RAX: 0000000000000058 RBX: 0000000000000040 RCX: 0000000000000000 RDX: ffff888018450000 RSI: ffffffff815e0d78 RDI: fffff520005bbd5a RBP: ffff88807d2ac160 R08: 0000000000000058 R09: 0000000000000000 R10: ffffffff815dab5e R11: 0000000000000000 R12: ffff88807d2ac160 R13: ffff88807d2ac000 R14: ffff88807d2ac160 R15: ffff88807d2ac160 FS: 00007f6aeb1db700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000004 CR3: 0000000068f0d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400