skbuff: skb_under_panic: text:ffffffff89e00aa7 len:-1824504664 put:-1824504740 head:ffff8880558bb000 data:ffff887fc24b6c64 tail:0x10c end:0x6c0 dev:bond3 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:212! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 6300 Comm: kworker/u8:12 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: bond3 bond_resend_igmp_join_requests_delayed RIP: 0010:skb_panic+0x157/0x160 net/core/skbuff.c:212 Code: c7 20 1e 6e 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 9e 4e 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:ffffc9000e6472d8 EFLAGS: 00010286 RAX: 0000000000000099 RBX: dffffc0000000000 RCX: 9ea140660ba1d500 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 00000000000006c0 R08: ffffc9000e646fe7 R09: 1ffff92001cc8dfc R10: dffffc0000000000 R11: fffff52001cc8dfd R12: ffff888078bd2c90 R13: ffff8880558bb000 R14: ffff887fc24b6c64 R15: 000000000000010c FS: 0000000000000000(0000) GS:ffff888125d06000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f07453e7dac CR3: 0000000073696000 CR4: 00000000003526f0 Call Trace: skb_under_panic net/core/skbuff.c:222 [inline] skb_push+0xc3/0xe0 net/core/skbuff.c:2614 ipgre_header+0x67/0x290 net/ipv4/ip_gre.c:895 dev_hard_header include/linux/netdevice.h:3419 [inline] neigh_connected_output+0x286/0x460 net/core/neighbour.c:1619 neigh_output include/net/neighbour.h:547 [inline] ip6_finish_output2+0xfb3/0x1480 net/ipv6/ip6_output.c:136 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247 NF_HOOK+0x9e/0x380 include/linux/netfilter.h:318 mld_sendpack+0x8d4/0xe60 net/ipv6/mcast.c:1855 ipv6_mc_rejoin_groups net/ipv6/mcast.c:2868 [inline] ipv6_mc_netdev_event+0x1b7/0x5a0 net/ipv6/mcast.c:2883 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers+0x88/0xc0 net/core/dev.c:2281 bond_resend_igmp_join_requests_delayed+0x61/0x170 drivers/net/bonding/bond_main.c:893 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 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:212 Code: c7 20 1e 6e 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 9e 4e 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:ffffc9000e6472d8 EFLAGS: 00010286 RAX: 0000000000000099 RBX: dffffc0000000000 RCX: 9ea140660ba1d500 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 00000000000006c0 R08: ffffc9000e646fe7 R09: 1ffff92001cc8dfc R10: dffffc0000000000 R11: fffff52001cc8dfd R12: ffff888078bd2c90 R13: ffff8880558bb000 R14: ffff887fc24b6c64 R15: 000000000000010c FS: 0000000000000000(0000) GS:ffff888125d06000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f05ba9a0e9c CR3: 00000000787b2000 CR4: 00000000003526f0