skbuff: skb_under_panic: text:ffffffff89fd2c17 len:877629076 put:877628980 head:ffff88807b298000 data:ffff888046d9f20c tail:0xa0 end:0x6c0 dev:team0 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:211! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 6846 Comm: kworker/0:16 Not tainted 6.16.0-rc3-syzkaller-00902-gbeead7eea896 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: mld mld_ifc_work RIP: 0010:skb_panic+0x157/0x160 net/core/skbuff.c:211 Code: c7 40 12 92 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 ce 2f 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:ffffc9000bf67418 EFLAGS: 00010286 RAX: 0000000000000094 RBX: dffffc0000000000 RCX: dc3720fa211f6e00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 00000000000006c0 R08: ffffc9000bf67127 R09: 1ffff920017ece24 R10: dffffc0000000000 R11: fffff520017ece25 R12: ffff888027fd0510 R13: ffff88807b298000 R14: ffff888046d9f20c R15: 00000000000000a0 FS: 0000000000000000(0000) GS:ffff888125c48000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3a7b00 CR3: 0000000078ce0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:3410 [inline] neigh_connected_output+0x283/0x460 net/core/neighbour.c:1541 neigh_output include/net/neighbour.h:540 [inline] ip6_finish_output2+0x11fe/0x16a0 net/ipv6/ip6_output.c:141 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output+0x234/0x7d0 net/ipv6/ip6_output.c:226 NF_HOOK+0x9e/0x380 include/linux/netfilter.h:317 mld_sendpack+0x800/0xd80 net/ipv6/mcast.c:1868 mld_send_cr net/ipv6/mcast.c:2169 [inline] mld_ifc_work+0x835/0xde0 net/ipv6/mcast.c:2702 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/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 40 12 92 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 ce 2f 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:ffffc9000bf67418 EFLAGS: 00010286 RAX: 0000000000000094 RBX: dffffc0000000000 RCX: dc3720fa211f6e00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 00000000000006c0 R08: ffffc9000bf67127 R09: 1ffff920017ece24 R10: dffffc0000000000 R11: fffff520017ece25 R12: ffff888027fd0510 R13: ffff88807b298000 R14: ffff888046d9f20c R15: 00000000000000a0 FS: 0000000000000000(0000) GS:ffff888125c48000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3b3d4e7e9c CR3: 000000000df38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400