skbuff: skb_over_panic: text:000000004ac22d57 len:196 put:20 head:0000000035622794 data:000000000253c41f 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: 0 PID: 3166 Comm: syz-executor0 Not tainted 4.15.0-rc2+ #213
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: 0018:ffff8801db407508 EFLAGS: 00010286
RAX: 0000000000000082 RBX: ffff8801cc57c940 RCX: 0000000000000000
RDX: 0000000000000082 RSI: 1ffff1003b680e61 RDI: ffffed003b680e95
RBP: ffff8801db407570 R08: 1ffff1003b680e23 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff857d24a0
R13: ffffffff84738f82 R14: 0000000000000014 R15: ffff8801c4dbc980
FS:  00000000029fa940(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000434440 CR3: 00000001c6b42000 CR4: 00000000001406f0
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:__split_vma+0x101/0x7b0 mm/mmap.c:2564
RSP: 0018:ffff8801c4c47ce0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff819ccc6b
RDX: 1ffffffff0d16180 RSI: ffff8801c5fc8460 RDI: ffff8801db2169c0
RBP: ffff8801c4c47d80 R08: 0000000000100070 R09: ffff8801d17d5aa8
R10: 1ffff10038988ee0 R11: 1ffff10038bf90a4 R12: ffff8801c5fc8460
R13: 1ffff10038988f9f R14: 00007fe4491bf000 R15: 000000000000000b
 split_vma+0x8f/0xc0 mm/mmap.c:2627
 mprotect_fixup+0x3f5/0x640 mm/mprotect.c:352
 do_mprotect_pkey+0x57d/0x900 mm/mprotect.c:490
 SYSC_mprotect mm/mprotect.c:515 [inline]
 SyS_mprotect+0x2a/0x40 mm/mprotect.c:512
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452b37
RSP: 002b:00007fff0991ca58 EFLAGS: 00000246 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00000000000000f8 RCX: 0000000000452b37
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007fe4491be000
RBP: 0000000000a74090 R08: 00000000006f8d60 R09: 00000000006f8d60
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000a74080
R13: 0000000000000001 R14: 0000000000000001 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: ffff8801db407508
---[ end trace 45a8d053cb7ca102 ]---