skbuff: skb_over_panic: text:ffffffff834ae475 len:56 put:8 head:ffff8800b99b2500 data:ffff8800b99b2590 tail:0xc8 end:0xc0 dev:ip6tnl0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 22040 Comm: syz-executor6 Not tainted 4.4.135-ge75204c #53
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b4218000 task.stack: ffff8801ad458000
RIP: 0010:[<ffffffff83895fcc>]  [<ffffffff83895fcc>] skb_panic+0x166/0x168 net/core/skbuff.c:100
RSP: 0018:ffff8801db307990  EFLAGS: 00010282
RAX: 0000000000000085 RBX: ffff8800b9bcc000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8125d249 RDI: ffff8800b42188dc
RBP: ffff8801db3079f8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8800ac362200
R13: ffff8800b99b2590 R14: 00000000000000c8 R15: 00000000000000c0
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f579cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000008148020 CR3: 0000000099d0d000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800b99b2590 00000000000000c8 00000000000000c0 ffff8800ac362200
 ffff8801cb66a540 ffffffff83ec48a0 ffffffff834ae475 00000008859b7900
 ffff8800b9bcc000 ffffffff834ae475 ffff8800b99b25c0 0000000000000008
Call Trace:
 <IRQ> 
 [<ffffffff83896014>] skb_over_panic net/core/skbuff.c:109 [inline]
 [<ffffffff83896014>] skb_put.cold.72+0x23/0x23 net/core/skbuff.c:1362
 [<ffffffff834ae475>] mld_newpack+0x8b5/0xc80 net/ipv6/mcast.c:1594
 [<ffffffff834aead9>] add_grhead.isra.32+0x299/0x370 net/ipv6/mcast.c:1677
 [<ffffffff834b20a6>] add_grec+0xbc6/0xe00 net/ipv6/mcast.c:1798
 [<ffffffff834b2b00>] mld_send_cr net/ipv6/mcast.c:1924 [inline]
 [<ffffffff834b2b00>] mld_ifc_timer_expire+0x340/0x740 net/ipv6/mcast.c:2430
 [<ffffffff81290a8c>] call_timer_fn+0x18c/0x870 kernel/time/timer.c:1185
 [<ffffffff812917b2>] __run_timers kernel/time/timer.c:1261 [inline]
 [<ffffffff812917b2>] run_timer_softirq+0x642/0xb90 kernel/time/timer.c:1444
 [<ffffffff838c5c2c>] __do_softirq+0x22c/0xa1a kernel/softirq.c:273
 [<ffffffff8113f8ad>] invoke_softirq kernel/softirq.c:350 [inline]
 [<ffffffff8113f8ad>] irq_exit+0x10d/0x140 kernel/softirq.c:391
 [<ffffffff838c5391>] exiting_irq arch/x86/include/asm/apic.h:653 [inline]
 [<ffffffff838c5391>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:926
 [<ffffffff838c42d0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:741
 <EOI> 
 [<ffffffff812e9262>] is_module_text_address+0x12/0x50 kernel/module.c:4103
 [<ffffffff8118bf4b>] __kernel_text_address+0x6b/0xa0 kernel/extable.c:103
 [<ffffffff8101687b>] print_context_stack+0x4b/0xd0 arch/x86/kernel/dumpstack.c:107
 [<ffffffff81015dba>] dump_trace+0x17a/0x360 arch/x86/kernel/dumpstack_64.c:243
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8803>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8ae7>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8ae7>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f90b2>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f4bae>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f4bae>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f4bae>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f4bae>] kmem_cache_alloc+0xbe/0x2a0 mm/slub.c:2628
 [<ffffffff814a0250>] ptlock_alloc+0x20/0x80 mm/memory.c:3918
 [<ffffffff810e3ee2>] ptlock_init include/linux/mm.h:1539 [inline]
 [<ffffffff810e3ee2>] pgtable_page_ctor include/linux/mm.h:1573 [inline]
 [<ffffffff810e3ee2>] pte_alloc_one+0x62/0x100 arch/x86/mm/pgtable.c:32
 [<ffffffff814947ee>] __pte_alloc+0x2e/0x3b0 mm/memory.c:568
 [<ffffffff814996f1>] copy_pte_range mm/memory.c:942 [inline]
 [<ffffffff814996f1>] copy_pmd_range mm/memory.c:1017 [inline]
 [<ffffffff814996f1>] copy_pud_range mm/memory.c:1039 [inline]
 [<ffffffff814996f1>] copy_page_range+0xf01/0x1470 mm/memory.c:1101
 [<ffffffff8112b5ab>] dup_mmap kernel/fork.c:515 [inline]
 [<ffffffff8112b5ab>] dup_mm kernel/fork.c:983 [inline]
 [<ffffffff8112b5ab>] copy_mm kernel/fork.c:1037 [inline]
 [<ffffffff8112b5ab>] copy_process+0x3efb/0x63e0 kernel/fork.c:1503
 [<ffffffff8112dea6>] _do_fork+0x146/0xe10 kernel/fork.c:1784
 [<ffffffff8112ec47>] SYSC_clone kernel/fork.c:1893 [inline]
 [<ffffffff8112ec47>] SyS_clone+0x37/0x50 kernel/fork.c:1887
 [<ffffffff81006d96>] do_syscall_32_irqs_on arch/x86/entry/common.c:392 [inline]
 [<ffffffff81006d96>] do_fast_syscall_32+0x326/0x8b0 arch/x86/entry/common.c:459
 [<ffffffff838c40aa>] sysenter_flags_fixed+0xd/0x17
Code: 7b 37 c6 fd 4c 8b 4d b8 8b 4b 78 41 54 48 c7 c7 e0 43 ec 83 44 8b 45 d4 41 57 48 8b 55 c8 41 56 48 8b 75 c0 41 55 e8 2d f2 b7 fd <0f> 0b e8 dd b4 ab fd 4c 8b 65 08 e8 24 21 c6 fd 48 c7 c1 60 48 
RIP  [<ffffffff83895fcc>] skb_panic+0x166/0x168 net/core/skbuff.c:100
 RSP <ffff8801db307990>
---[ end trace 9cafc04d0c58561b ]---