skbuff: skb_over_panic: text:000000001576ac98 len:56 put:8 head:000000002aa29d69 data:000000002913d524 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: 14987 Comm: syz-executor.4 Not tainted 4.14.152+ #0
task: 000000001f4ac941 task.stack: 000000004a7b96f8
RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:104
RSP: 0018:ffff8881d76079d8 EFLAGS: 00010286
RAX: 0000000000000085 RBX: ffff88817bdf2a00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffffa766a080 RDI: ffffed103aec0f2d
RBP: ffffffffa7889c20 R08: 0000000000000085 R09: ffffed103aec4ce9
selinux_nlmsg_perm: 54 callbacks suppressed
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=192 sclass=netlink_route_socket pig=14990 comm=syz-executor.0
R10: ffffed103aec4ce8 R11: ffff8881d7626747 R12: ffffffffa6f8480e
R13: 0000000000000008 R14: ffff888197a5e600 R15: 00000000000000c0
FS:  00007f51ac56c700(0000) GS:ffff8881d7600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fa30000 CR3: 00000001e0a26002 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 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
 </IRQ>
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:ffff88817ea97550 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000007 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888194c64eac
RBP: ffff8881d7629240 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881d7629240
R13: ffff8881c976de00 R14: 0000000000000000 R15: ffff888194c64680
 finish_lock_switch kernel/sched/sched.h:1491 [inline]
 finish_task_switch+0x204/0x660 kernel/sched/core.c:2733
 context_switch kernel/sched/core.c:2869 [inline]
 __schedule+0x894/0x1f80 kernel/sched/core.c:3454
 preempt_schedule_common+0x4f/0xd0 kernel/sched/core.c:3578
 ___preempt_schedule+0x16/0x18
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x3b/0x40 kernel/locking/spinlock.c:184
 spin_unlock include/linux/spinlock.h:357 [inline]
 zap_pte_range mm/memory.c:1399 [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+0xb90/0x1320 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:2422
 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: 0033:0x45a219
RSP: 002b:00007f51ac56bcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 000000000075bf28 RCX: 000000000045a219
RDX: 00000000004c9689 RSI: 0000000000000081 RDI: 000000000075bf2c
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 000000000075bf2c
R13: 00007ffdfc23382f R14: 00007f51ac56c9c0 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 40 96 88 a7 ff 74 24 10 ff 74 24 20 e8 39 b7 ee fe <0f> 0b e8 d7 91 fd fe 4c 8b 64 24 18 e8 fd 54 20 ff 48 c7 c1 e0 
RIP: skb_panic+0x16c/0x16e net/core/skbuff.c:104 RSP: ffff8881d76079d8
---[ end trace 9d9386bd966658ed ]---