IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready ip6_tunnel: ð xmit: Local address not yet configured! ip6_tunnel: ï xmit: Local address not yet configured! skbuff: skb_over_panic: text:00000000592c83b3 len:56 put:8 head:00000000b1b22bbb data:00000000c1ac85da tail:0xc8 end:0xc0 dev:ip6tnl0 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:104! invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI Modules linked in: CPU: 0 PID: 15224 Comm: syz-executor.5 Not tainted 4.14.156-syzkaller #0 task: 00000000e8c0f3fc task.stack: 000000006120a6a9 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: 0018:ffff8881dba079d8 EFLAGS: 00010286 RAX: 0000000000000085 RBX: ffff8881d1b238c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8706a420 RDI: ffffed103b740f2d RBP: ffffffff8728a0a0 R08: 0000000000000085 R09: ffffed103b744ce9 R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: ffffffff8698600e R13: 0000000000000008 R14: ffff8881a4b02200 R15: 00000000000000c0 FS: 00007f834b173700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000001a704e004 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: skb_over_panic net/core/skbuff.c:109 [inline] skb_put.cold+0x24/0x24 net/core/skbuff.c:1699 mld_newpack+0x4ce/0x7a0 net/ipv6/mcast.c:1608 add_grhead.isra.0+0x29c/0x370 net/ipv6/mcast.c:1691 add_grec+0x6a3/0xf10 net/ipv6/mcast.c:1822 mld_send_cr net/ipv6/mcast.c:1948 [inline] mld_ifc_timer_expire+0x340/0x7e0 net/ipv6/mcast.c:2455 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279 expire_timers+0x227/0x4c0 kernel/time/timer.c:1318 __run_timers kernel/time/timer.c:1636 [inline] run_timer_softirq+0x1eb/0x5d0 kernel/time/timer.c:1649 __do_softirq+0x234/0x9ec kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x114/0x150 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x2b/0x50 kernel/locking/spinlock.c:200 RSP: 0018:ffff88819feb7730 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881c4d2082c RBP: ffff8881dba29240 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881dba29240 R13: ffff8881a0894680 R14: 0000000000000000 R15: ffff8881c4d20000 finish_lock_switch kernel/sched/sched.h:1487 [inline] finish_task_switch+0x204/0x660 kernel/sched/core.c:2734 context_switch kernel/sched/core.c:2870 [inline] __schedule+0x894/0x1f80 kernel/sched/core.c:3455 preempt_schedule_irq+0x5e/0xa0 kernel/sched/core.c:3682 retint_kernel+0x1b/0x2d RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_release+0x3de/0x740 kernel/locking/lockdep.c:4016 RSP: 0018:ffff88819feb7940 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: 1ffff11033fd6f2b RCX: 1ffff110389a4104 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000246 RBP: ffff8881c4d20000 R08: 0000000000000001 R09: 0000000000000000 R10: fffffbfff0f46145 R11: ffffffff87a30a2b R12: 0000000000000000 R13: ffff8881c4d20000 R14: 0000000000000001 R15: ffff8881c4d20828 __might_fault mm/memory.c:4584 [inline] __might_fault+0x177/0x1b0 mm/memory.c:4569 exit_robust_list+0xa2/0x240 kernel/futex.c:3591 mm_release+0x2f4/0x400 kernel/fork.c:1150 exit_mm kernel/exit.c:500 [inline] do_exit+0x54b/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2426 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a679 RSP: 002b:00007f834b172c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: 0000000000168000 RBX: 0000000000000003 RCX: 000000000045a679 RDX: 00000000fffffe38 RSI: 0000000020000080 RDI: 0000000000000008 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f834b1736d4 R13: 00000000004cb1c6 R14: 00000000004e3f68 R15: 00000000ffffffff Code: 20 ff 4c 8b 4c 24 10 8b 4b 78 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 c0 9a 28 87 ff 74 24 10 ff 74 24 20 e8 49 a3 ee fe <0f> 0b e8 e7 7d fd fe 4c 8b 64 24 18 e8 bd 43 20 ff 48 c7 c1 60 RIP: skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: ffff8881dba079d8 ---[ end trace 6bb607402e331971 ]---