syzbot

Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 16173 Comm: syz-executor6 Not tainted 4.15.0+ #221
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ip6t_do_table+0x132d/0x1a30 net/ipv6/netfilter/ip6_tables.c:355
RSP: 0018:ffff8801d30d6728 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801ac392080 RCX: ffffffff84db22a1
RDX: 00000000000003e5 RSI: 0000000000000000 RDI: ffff8801ac3921de
 should_failslab+0xec/0x120 mm/failslab.c:32
RBP: ffff8801d30d6970 R08: ffff8801d30d6a68 R09: 0000000000000002
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slab.c:3286 [inline]
 kmem_cache_alloc_node_trace+0x5a/0x750 mm/slab.c:3648
R10: 00000000000000d0 R11: 0000000000000000 R12: 0000000000000001
 __do_kmalloc_node mm/slab.c:3668 [inline]
 __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3683
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801ac392150
 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137
FS:  00007fdbb5763700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000
 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000071c000 CR3: 00000001d3d09001 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 alloc_skb include/linux/skbuff.h:983 [inline]
 netlink_dump+0x545/0xcf0 net/netlink/af_netlink.c:2203
 __netlink_dump_start+0x4f0/0x6d0 net/netlink/af_netlink.c:2319
 netlink_dump_start include/linux/netlink.h:214 [inline]
 rtnetlink_rcv_msg+0x7f0/0xb10 net/core/rtnetlink.c:4550
 ip6table_security_hook+0x65/0x80 net/ipv6/netfilter/ip6table_security.c:45
 nf_hook_entry_hookfn include/linux/netfilter.h:120 [inline]
 nf_hook_slow+0xba/0x1a0 net/netfilter/core.c:483
 netlink_rcv_skb+0x14b/0x380 net/netlink/af_netlink.c:2442
 nf_hook include/linux/netfilter.h:243 [inline]
 NF_HOOK include/linux/netfilter.h:286 [inline]
 ip6_input+0x35c/0x560 net/ipv6/ip6_input.c:327
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4605
 ip6_mc_input+0x3a8/0xb10 net/ipv6/ip6_input.c:404
 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline]
 netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334
 dst_input include/net/dst.h:449 [inline]
 ip6_rcv_finish+0x297/0x8c0 net/ipv6/ip6_input.c:71
 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897
 NF_HOOK include/linux/netfilter.h:288 [inline]
 ipv6_rcv+0xf37/0x1fa0 net/ipv6/ip6_input.c:208
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046
 __netif_receive_skb_core+0x1a41/0x3460 net/core/dev.c:4547
 __sys_sendmsg+0xe5/0x210 net/socket.c:2080
 SYSC_sendmsg net/socket.c:2091 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2087
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x453299
RSP: 002b:00007f692ffbac58 EFLAGS: 00000212
 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f692ffbaaa0 RCX: 0000000000453299
RDX: 0000000000000000 RSI: 0000000020004fc8 RDI: 0000000000000013
RBP: 00007f692ffbaa90 R08: 0000000000000000 R09: 0000000000000000
 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4612
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096
R13: 00007f692ffbabc8 R14: 00000000004b8096 R15: 0000000000000000
 netif_receive_skb_internal+0x10b/0x670 net/core/dev.c:4686
 netif_receive_skb+0xae/0x390 net/core/dev.c:4710
 tun_rx_batched.isra.52+0x5ee/0x870 drivers/net/tun.c:1558
 tun_get_user+0x25de/0x3940 drivers/net/tun.c:1958
 tun_chr_write_iter+0xb9/0x160 drivers/net/tun.c:1986
 call_write_iter include/linux/fs.h:1781 [inline]
 do_iter_readv_writev+0x55c/0x830 fs/read_write.c:653
 do_iter_write+0x154/0x540 fs/read_write.c:932
 vfs_writev+0x18a/0x340 fs/read_write.c:977
 do_writev+0xfc/0x2a0 fs/read_write.c:1012
 SYSC_writev fs/read_write.c:1085 [inline]
 SyS_writev+0x27/0x30 fs/read_write.c:1082
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x453171
RSP: 002b:00007fdbb5762b80 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453171
RDX: 0000000000000001 RSI: 00007fdbb5762bd0 RDI: 0000000000000012
RBP: 00000000000005e6 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000004a R11: 0000000000000293 R12: 00000000006f7e30
R13: 00000000ffffffff R14: 00007fdbb57636d4 R15: 0000000000000000
Code: 41 f6 87 83 00 00 00 04 75 37 e8 0f 83 95 fc 8b 85 14 fe ff ff 48 8b b5 50 fe ff ff 4c 8d 2c c6 44 8d 60 01 4c 89 e8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 26 03 00 00 4d 89 7d 00 44 89 a5 14 fe ff 
RIP: ip6t_do_table+0x132d/0x1a30 net/ipv6/netfilter/ip6_tables.c:355 RSP: ffff8801d30d6728
---[ end trace c78919f241c5e206 ]---