IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready skbuff: skb_over_panic: text:0000000001304ed8 len:56 put:8 head:000000009542f147 data:00000000919aa4f9 tail:0xc8 end:0xc0 dev:ip6tnl0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:104! invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI Modules linked in: CPU: 1 PID: 18794 Comm: syz-executor.3 Not tainted 4.14.156-syzkaller #0 task: 00000000b86ed599 task.stack: 0000000041fa48bb RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: 0018:ffff8881dbb079d8 EFLAGS: 00010286 RAX: 0000000000000085 RBX: ffff8881b0fce000 RCX: 0000000000000000 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 RDX: 0000000000000000 RSI: ffffffffad06a420 RDI: ffffed103b760f2d RBP: ffffffffad28a0a0 R08: 0000000000000085 R09: ffffed103b764ce9 R10: ffffed103b764ce8 R11: ffff8881dbb26747 R12: ffffffffac98600e R13: 0000000000000008 R14: ffff8881bb35a200 R15: 00000000000000c0 FS: 00007fc93ee1a700(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004eb720 CR3: 0000000033626003 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 add_grhead.isra.0+0x29c/0x370 net/ipv6/mcast.c:1691 add_grec+0x6a3/0xf10 net/ipv6/mcast.c:1822 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 __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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 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:ffff88818bb77668 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 RAX: 0000000000000007 RBX: ffff88818de95e00 RCX: 1ffff11031bd2ccf RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000246 RBP: ffffffffad6d52a0 R08: 0000000000000000 R09: 0000000000000001 R10: ffff88818de96658 R11: c6c5d5fa062a855e R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:629 [inline] lock_page_memcg+0x36/0x290 mm/memcontrol.c:1669 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18790 comm=syz-executor.0 page_remove_file_rmap mm/rmap.c:1211 [inline] page_remove_rmap+0x160/0x4c0 mm/rmap.c:1296 zap_pte_range mm/memory.c:1342 [inline] zap_pmd_range mm/memory.c:1444 [inline] zap_pud_range mm/memory.c:1473 [inline] zap_p4d_range mm/memory.c:1494 [inline] unmap_page_range+0xa26/0x1320 mm/memory.c:1515 unmap_single_vma+0x118/0x170 mm/memory.c:1560 unmap_vmas+0x43/0xa0 mm/memory.c:1590 exit_mmap+0x213/0x440 mm/mmap.c:3077 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 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:00007fc93ee19cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000075bf28 RCX: 000000000045a679 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c R13: 00007fff65f2401f R14: 00007fc93ee1a9c0 R15: 000000000075bf2c 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 ad 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: ffff8881dbb079d8 ---[ end trace b1fc8c617d89869e ]---