8021q: adding VLAN 0 to HW filter on device bond3 bond3: (slave gre2): The slave device specified does not support setting the MAC address bond3: (slave gre2): Setting fail_over_mac to active for active-backup mode bond3: (slave gre2): making interface the new active one gre2: entered promiscuous mode ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:2306! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 23664 Comm: syz.1.4929 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:pskb_expand_head+0x12da/0x1320 net/core/skbuff.c:2306 Code: f8 e9 81 f3 ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c e0 f3 ff ff 4c 89 ff e8 11 e7 c4 f8 e9 d3 f3 ff ff e8 87 c0 5b f8 90 <0f> 0b e8 7f c0 5b f8 90 0f 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f RSP: 0018:ffffc900109d6350 EFLAGS: 00010287 RAX: ffffffff89687a49 RBX: ffff888034660640 RCX: 0000000000080000 RDX: ffffc9001f74e000 RSI: 000000000003f8f8 RDI: 000000000003f8f9 RBP: 0000000000000000 R08: ffff888036110c28 R09: 0000000000000018 R10: dffffc0000000000 R11: ffffffff8a263b70 R12: dffffc0000000000 R13: 0000000000000820 R14: 0000000093c5b9d0 R15: 0000000000000180 FS: 00007fcfa73f66c0(0000) GS:ffff8881254b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa7495456b8 CR3: 000000007c7d0000 CR4: 00000000003526f0 Call Trace: ipgre_header+0xd5/0x350 net/ipv4/ip_gre.c:900 dev_hard_header include/linux/netdevice.h:3439 [inline] arp_create+0x41c/0xa00 net/ipv4/arp.c:578 arp_send_dst net/ipv4/arp.c:314 [inline] arp_send+0xa5/0x190 net/ipv4/arp.c:328 inetdev_send_gratuitous_arp net/ipv4/devinet.c:1571 [inline] inetdev_event+0x11bd/0x1610 net/ipv4/devinet.c:1638 notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2280 [inline] call_netdevice_notifiers+0x90/0xd0 net/core/dev.c:2294 bond_peer_notify_may_events+0x370/0x5b0 drivers/net/bonding/bond_main.c:1237 bond_change_active_slave+0x2589/0x35f0 drivers/net/bonding/bond_main.c:1330 bond_select_active_slave+0x909/0xd40 drivers/net/bonding/bond_main.c:1372 bond_enslave+0x22a5/0x3c40 drivers/net/bonding/bond_main.c:2237 do_set_master+0x533/0x6d0 net/core/rtnetlink.c:2963 rtnl_newlink_create+0x6af/0xb70 net/core/rtnetlink.c:3854 __rtnl_newlink net/core/rtnetlink.c:3957 [inline] rtnl_newlink+0x1666/0x1be0 net/core/rtnetlink.c:4072 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6958 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xa68/0xad0 net/socket.c:2592 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2681 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcfa919bf79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcfa73f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fcfa9416180 RCX: 00007fcfa919bf79 RDX: 00000000000440b0 RSI: 0000200000000280 RDI: 0000000000000004 RBP: 00007fcfa92327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcfa9416218 R14: 00007fcfa9416180 R15: 00007fffb8225988 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pskb_expand_head+0x12da/0x1320 net/core/skbuff.c:2306 Code: f8 e9 81 f3 ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c e0 f3 ff ff 4c 89 ff e8 11 e7 c4 f8 e9 d3 f3 ff ff e8 87 c0 5b f8 90 <0f> 0b e8 7f c0 5b f8 90 0f 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f RSP: 0018:ffffc900109d6350 EFLAGS: 00010287 RAX: ffffffff89687a49 RBX: ffff888034660640 RCX: 0000000000080000 RDX: ffffc9001f74e000 RSI: 000000000003f8f8 RDI: 000000000003f8f9 RBP: 0000000000000000 R08: ffff888036110c28 R09: 0000000000000018 R10: dffffc0000000000 R11: ffffffff8a263b70 R12: dffffc0000000000 R13: 0000000000000820 R14: 0000000093c5b9d0 R15: 0000000000000180 FS: 00007fcfa73f66c0(0000) GS:ffff8881255b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa7489e7198 CR3: 000000007c7d0000 CR4: 00000000003526f0