IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready device sit0 left promiscuous mode skbuff: skb_over_panic: text:00000000d86246a3 len:56 put:8 head:00000000a243fae2 data:00000000689e5183 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: 14969 Comm: syz-executor.0 Not tainted 4.14.155-syzkaller #0 task: 0000000041463dd0 task.stack: 000000002b52d6b4 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: 0018:ffff8881dba079d8 EFLAGS: 00010286 RAX: 0000000000000085 RBX: ffff8881d1c4a280 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffffa766a380 RDI: ffffed103b740f2d RBP: ffffffffa7889fe0 R08: 0000000000000085 R09: ffffed103b744ce9 R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: ffffffffa6f85d2e R13: 0000000000000008 R14: ffff8881da073300 R15: 00000000000000c0 FS: 00000000016e3940(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000016ec978 CR3: 00000001a7128004 CR4: 00000000001606b0 DR0: 0000000020000000 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_acquire+0x170/0x360 kernel/locking/lockdep.c:3997 RSP: 0018:ffff8881d1227a48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: ffff8881c21a8000 RCX: 1ffff11038435114 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000246 RBP: ffff8881c5b2ee90 R08: 0000000000004af1 R09: 0000000000000002 R10: ffff8881c21a8880 R11: 8700b69845043a29 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] sync_global_pgds+0x258/0x3b0 arch/x86/mm/init_64.c:162 __vmalloc_node_range+0x375/0x6d0 mm/vmalloc.c:1782 __vmalloc_node mm/vmalloc.c:1825 [inline] __vmalloc_node_flags mm/vmalloc.c:1839 [inline] vzalloc+0x60/0x80 mm/vmalloc.c:1878 alloc_counters.isra.0+0x42/0x80 net/ipv6/netfilter/ip6_tables.c:818 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:822 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1025 [inline] do_ipt_get_ctl+0x430/0x790 net/ipv4/netfilter/ip_tables.c:1702 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x68/0xc0 net/netfilter/nf_sockopt.c:122 ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline] ip_getsockopt+0x118/0x160 net/ipv4/ip_sockglue.c:1551 tcp_getsockopt net/ipv4/tcp.c:3249 [inline] tcp_getsockopt+0x81/0xc0 net/ipv4/tcp.c:3243 SYSC_getsockopt net/socket.c:1896 [inline] SyS_getsockopt+0x11d/0x1f0 net/socket.c:1878 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45d14a RSP: 002b:00007fffde5baad8 EFLAGS: 00000216 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fffde5bab00 RCX: 000000000045d14a RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000717e80 R08: 00007fffde5baafc R09: 0000000000004000 R10: 00007fffde5bac00 R11: 0000000000000216 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000715cc0 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 00 9a 88 a7 ff 74 24 10 ff 74 24 20 e8 e9 a3 ee fe <0f> 0b e8 87 7e fd fe 4c 8b 64 24 18 e8 5d 44 20 ff 48 c7 c1 a0 RIP: skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: ffff8881dba079d8 ---[ end trace 03a0a5c15644d648 ]---