skbuff: skb_under_panic: text:ffffffff8709ce76 len:115 put:19 head:ffff88808b49e000 data:ffff88808b49dffd tail:0x70 end:0x6c0 dev:bond0 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:109! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6809 Comm: syz-executor844 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_panic+0x14d/0x150 net/core/skbuff.c:105 Code: 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 49 89 e9 b8 00 00 00 00 53 41 55 41 54 41 57 e8 34 d3 ee fa 48 83 c4 20 <0f> 0b 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 68 4c 89 cb 4d 89 RSP: 0018:ffffc900000079e8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffff8880919ac000 RCX: db1ff04c0c74d300 RDX: 0000000000000301 RSI: 0000000000000301 RDI: 0000000000000000 RBP: ffff88808b49e000 R08: ffffffff815e2109 R09: ffffed1015d062c0 R10: ffffed1015d062c0 R11: 0000000000000000 R12: 0000000000000070 R13: 00000000000006c0 R14: dffffc0000000000 R15: ffff88808b49dffd FS: 00000000014bb880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020003010 CR3: 00000000a2499000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_under_panic+0x25/0x30 net/core/skbuff.c:119 skb_push+0xc5/0xd0 net/core/skbuff.c:1884 ipgre_header+0x66/0x470 net/ipv4/ip_gre.c:840 dev_hard_header include/linux/netdevice.h:3049 [inline] neigh_connected_output+0x23a/0x3a0 net/core/neighbour.c:1513 neigh_output include/net/neighbour.h:509 [inline] ip6_finish_output2+0x107a/0x1400 net/ipv6/ip6_output.c:117 dst_output include/net/dst.h:443 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] mld_sendpack+0x6a0/0xa50 net/ipv6/mcast.c:1679 mld_send_cr net/ipv6/mcast.c:1975 [inline] mld_ifc_timer_expire+0x864/0xc50 net/ipv6/mcast.c:2474 call_timer_fn+0x91/0x160 kernel/time/timer.c:1413 expire_timers kernel/time/timer.c:1458 [inline] __run_timers+0x65e/0x830 kernel/time/timer.c:1755 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1768 __do_softirq+0x236/0x66c kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x91/0xe0 arch/x86/kernel/irq_64.c:77 do_softirq+0xf9/0x190 kernel/softirq.c:343 __local_bh_enable_ip+0x13f/0x180 kernel/softirq.c:195 get_next_corpse net/netfilter/nf_conntrack_core.c:2226 [inline] nf_ct_iterate_cleanup+0x307/0x390 net/netfilter/nf_conntrack_core.c:2249 nf_ct_iterate_cleanup_net+0xfc/0x150 net/netfilter/nf_conntrack_core.c:2334 masq_device_event+0x9b/0xd0 net/netfilter/nf_nat_masquerade.c:88 notifier_call_chain kernel/notifier.c:83 [inline] __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:2033 [inline] call_netdevice_notifiers_extack net/core/dev.c:2045 [inline] call_netdevice_notifiers net/core/dev.c:2059 [inline] dev_close_many+0x31a/0x4d0 net/core/dev.c:1634 dev_close+0x12c/0x1f0 net/core/dev.c:1656 bond_enslave+0x39fc/0x5210 drivers/net/bonding/bond_main.c:2016 do_set_master net/core/rtnetlink.c:2517 [inline] __rtnl_newlink net/core/rtnetlink.c:3469 [inline] rtnl_newlink+0x19ef/0x1c10 net/core/rtnetlink.c:3500 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5563 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0xa57/0xd70 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2353 ___sys_sendmsg net/socket.c:2407 [inline] __sys_sendmsg+0x2b1/0x360 net/socket.c:2440 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x443829 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 0f fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffd1a64fba8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443829 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000004 RBP: 00007ffd1a64fbb0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb R10: 0000000001bbbbbb R11: 0000000000000246 R12: 00007ffd1a64fbc0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 4ec1bfab8adcaf85 ]--- RIP: 0010:skb_panic+0x14d/0x150 net/core/skbuff.c:105 Code: 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 49 89 e9 b8 00 00 00 00 53 41 55 41 54 41 57 e8 34 d3 ee fa 48 83 c4 20 <0f> 0b 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 68 4c 89 cb 4d 89 RSP: 0018:ffffc900000079e8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffff8880919ac000 RCX: db1ff04c0c74d300 RDX: 0000000000000301 RSI: 0000000000000301 RDI: 0000000000000000 RBP: ffff88808b49e000 R08: ffffffff815e2109 R09: ffffed1015d062c0 R10: ffffed1015d062c0 R11: 0000000000000000 R12: 0000000000000070 R13: 00000000000006c0 R14: dffffc0000000000 R15: ffff88808b49dffd FS: 00000000014bb880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020003010 CR3: 00000000a2499000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400