skbuff: skb_under_panic: text:ffffffff8a056a27 len:-1824001736 put:-1824001812 head:ffff8880344c1000 data:ffff887fa1041fd4 tail:0x10c end:0x6c0 dev:bond1 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:211! Oops: invalid opcode: 0000 [#2] SMP KASAN PTI CPU: 0 UID: 0 PID: 59 Comm: kworker/u8:4 Tainted: G D 6.16.0-syzkaller-g22c5696e3fe0 #0 PREEMPT(full) Tainted: [D]=DIE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: bond1 bond_resend_igmp_join_requests_delayed RIP: 0010:skb_panic+0x157/0x160 net/core/skbuff.c:211 Code: c7 a0 fd 90 8c 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 55 41 57 41 56 e8 6e 18 f5 ff 48 83 c4 20 90 <0f> 0b cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000210f358 EFLAGS: 00010282 RAX: 0000000000000099 RBX: dffffc0000000000 RCX: 41cb314d4a547e00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 00000000000006c0 R08: ffffc9000210f067 R09: 1ffff92000421e0c R10: dffffc0000000000 R11: fffff52000421e0d R12: ffff8880759c8510 R13: ffff8880344c1000 R14: ffff887fa1041fd4 R15: 000000000000010c FS: 0000000000000000(0000) GS:ffff888125c87000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000769ea000 CR4: 00000000003526f0 Call Trace: skb_under_panic net/core/skbuff.c:221 [inline] skb_push+0xc3/0xe0 net/core/skbuff.c:2602 ipgre_header+0x67/0x290 net/ipv4/ip_gre.c:895 dev_hard_header include/linux/netdevice.h:3407 [inline] neigh_connected_output+0x283/0x460 net/core/neighbour.c:1536 neigh_output include/net/neighbour.h:539 [inline] ip6_finish_output2+0x11fe/0x16a0 net/ipv6/ip6_output.c:141 NF_HOOK+0x9e/0x380 include/linux/netfilter.h:317 mld_sendpack+0x800/0xd80 net/ipv6/mcast.c:1868 ipv6_mc_rejoin_groups net/ipv6/mcast.c:2878 [inline] ipv6_mc_netdev_event+0x1e4/0x600 net/ipv6/mcast.c:2893 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2268 [inline] call_netdevice_notifiers+0x88/0xc0 net/core/dev.c:2282 bond_resend_igmp_join_requests_delayed+0x61/0x170 drivers/net/bonding/bond_main.c:963 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x157/0x160 net/core/skbuff.c:211 Code: c7 a0 fd 90 8c 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 55 41 57 41 56 e8 6e 18 f5 ff 48 83 c4 20 90 <0f> 0b cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90004cef5c0 EFLAGS: 00010286 RAX: 0000000000000099 RBX: dffffc0000000000 RCX: 7cb02004b5da2700 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000000180 R08: ffffc90004cef2c7 R09: 1ffff9200099de58 R10: dffffc0000000000 R11: fffff5200099de59 R12: ffff8880762b9650 R13: ffff8880778ec9c0 R14: ffff887fe446d994 R15: 00000000000000c0 FS: 0000000000000000(0000) GS:ffff888125d87000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa82cc5fd58 CR3: 0000000032348000 CR4: 00000000003526f0