skbuff: skb_over_panic: text:000000006c0bde56 len:196 put:20 head:0000000057614fc2 data:00000000f9579c5d tail:0xd4 end:0xc0 dev:lo
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:104!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 3162 Comm: syz-executor0 Not tainted 4.15.0-rc2+ #122
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:skb_panic+0x15c/0x1f0 net/core/skbuff.c:100
RSP: 0000:ffff8801db507508 EFLAGS: 00010286
RAX: 0000000000000082 RBX: ffff8801c506e480 RCX: 0000000000000000
RDX: 0000000000000082 RSI: 1ffff1003b6a0e61 RDI: ffffed003b6a0e95
RBP: ffff8801db507570 R08: 1ffff1003b6a0e23 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff857d24a0
R13: ffffffff84738f82 R14: 0000000000000014 R15: ffff8801c52a0d40
FS:  0000000000000000(0000) GS:ffff8801db500000(0063) knlGS:0000000009536900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000008063d60 CR3: 00000001c5f39000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 skb_over_panic net/core/skbuff.c:109 [inline]
 skb_put+0x181/0x1c0 net/core/skbuff.c:1694
 add_grhead.isra.24+0x42/0x3b0 net/ipv6/mcast.c:1695
 add_grec+0xa55/0x1060 net/ipv6/mcast.c:1817
 mld_send_cr net/ipv6/mcast.c:1903 [inline]
 mld_ifc_timer_expire+0x4d2/0x770 net/ipv6/mcast.c:2448
 call_timer_fn+0x23b/0x840 kernel/time/timer.c:1320
 expire_timers kernel/time/timer.c:1357 [inline]
 __run_timers+0x7e1/0xb60 kernel/time/timer.c:1660
 run_timer_softirq+0x4c/0xb0 kernel/time/timer.c:1686
 __do_softirq+0x29d/0xbb2 kernel/softirq.c:285
 invoke_softirq kernel/softirq.c:365 [inline]
 irq_exit+0x1d3/0x210 kernel/softirq.c:405
 exiting_irq arch/x86/include/asm/apic.h:540 [inline]
 smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052
 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:795
 </IRQ>
RIP: 0010:rcu_read_lock_held+0x8f/0xc0 kernel/rcu/update.c:334
RSP: 0000:ffff8801c5dd7530 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff11
RAX: 0000000000000001 RBX: ffffea00071f6400 RCX: 1ffff10038bbae99
RDX: dffffc0000000000 RSI: 0000000008066000 RDI: ffff8801db51afac
RBP: ffff8801c5dd7530 R08: 0000000000000003 R09: 1ffff10038bbae03
R10: ffff8801c5c9e400 R11: 0000000000000003 R12: ffffed0038bbaf33
R13: ffffed0038bbaf0b R14: dffffc0000000000 R15: ffff8801c5dd79f8
 radix_tree_deref_slot include/linux/radix-tree.h:237 [inline]
 filemap_map_pages+0x690/0x15d0 mm/filemap.c:2633
 do_fault_around mm/memory.c:3567 [inline]
 do_read_fault mm/memory.c:3601 [inline]
 do_fault mm/memory.c:3706 [inline]
 handle_pte_fault mm/memory.c:3936 [inline]
 __handle_mm_fault+0x2338/0x3e20 mm/memory.c:4060
 handle_mm_fault+0x334/0x8d0 mm/memory.c:4097
 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429
 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504
 page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1094
RIP: 0023:0x8063d60
RSP: 002b:00000000fff986ac EFLAGS: 00010206
RAX: 0000000000000011 RBX: 000000000000000f RCX: 00000000f7f6c000
RDX: 0000000000000003 RSI: 00000000f7f8cb40 RDI: 0000000000021000
RBP: 00000000fff98758 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: 03 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 78 41 57 48 c7 c7 20 1d 7d 85 52 56 4c 89 ea 41 50 4c 89 e6 45 89 f0 e8 ac 37 3f fd <0f> 0b 4c 89 4d b8 4c 89 45 c0 48 89 75 c8 48 89 55 d0 e8 3d f4 
RIP: skb_panic+0x15c/0x1f0 net/core/skbuff.c:100 RSP: ffff8801db507508
---[ end trace 84d1dbfead833f73 ]---