==================================================================
BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline]
BUG: KASAN: slab-out-of-bounds in pfkey_add+0x145d/0x3220 net/key/af_key.c:1506
Read of size 512 at addr ffff88009afbf1c0 by task syz-executor3/13573

CPU: 0 PID: 13573 Comm: syz-executor3 Not tainted 4.4.136-ge4798d7 #60
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 6c64b79ddc69c31f ffff8801cdda7740 ffffffff81e0edad
 ffffea00026bef80 ffff88009afbf1c0 0000000000000000 ffff88009afbf380
 ffff88009afbf180 ffff8801cdda7778 ffffffff815159b6 ffff88009afbf1c0
Call Trace:
 [<ffffffff81e0edad>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0edad>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff815159b6>] print_address_description+0x6c/0x216 mm/kasan/report.c:252
 [<ffffffff81515cd5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff81515cd5>] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff814f874f>] check_memory_region_inline mm/kasan/kasan.c:325 [inline]
 [<ffffffff814f874f>] check_memory_region+0x14f/0x1b0 mm/kasan/kasan.c:332
 [<ffffffff814f8c93>] memcpy+0x23/0x50 mm/kasan/kasan.c:367
 [<ffffffff8358775d>] pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline]
 [<ffffffff8358775d>] pfkey_add+0x145d/0x3220 net/key/af_key.c:1506
 [<ffffffff8358bdf1>] pfkey_process+0x671/0x740 net/key/af_key.c:2834
 [<ffffffff8358d626>] pfkey_sendmsg+0x346/0xae0 net/key/af_key.c:3678
 [<ffffffff82f1e1fc>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e1fc>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1fcc5>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f21d66>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff82f21e4d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82f21e4d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff838c2825>] entry_SYSCALL_64_fastpath+0x22/0x9e

Allocated by task 13573:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8873>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8b57>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8b57>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f9334>] kasan_krealloc+0x64/0x80 mm/kasan/kasan.c:654
 [<ffffffff814f252a>] ksize+0x8a/0xf0 mm/slub.c:3727
 [<ffffffff82f380f3>] __alloc_skb+0x133/0x600 net/core/skbuff.c:237
 [<ffffffff8358d3de>] alloc_skb include/linux/skbuff.h:815 [inline]
 [<ffffffff8358d3de>] pfkey_sendmsg+0xfe/0xae0 net/key/af_key.c:3665
 [<ffffffff82f1e1fc>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e1fc>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1fcc5>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f21d66>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff82f21e4d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82f21e4d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff838c2825>] entry_SYSCALL_64_fastpath+0x22/0x9e

Freed by task 12405:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8873>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f91a2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f91a2>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f66a4>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f66a4>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f66a4>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f66a4>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff82f371d4>] skb_free_head net/core/skbuff.c:571 [inline]
 [<ffffffff82f371d4>] skb_release_data+0x304/0x3b0 net/core/skbuff.c:602
 [<ffffffff82f372ca>] skb_release_all+0x4a/0x60 net/core/skbuff.c:661
 [<ffffffff82f378d3>] __kfree_skb net/core/skbuff.c:675 [inline]
 [<ffffffff82f378d3>] consume_skb+0xf3/0x3d0 net/core/skbuff.c:748
 [<ffffffff830b1ff2>] netlink_broadcast_filtered+0x2b2/0x9c0 net/netlink/af_netlink.c:1479
 [<ffffffff81e181d8>] kobject_uevent_env+0x6d8/0xb80 lib/kobject_uevent.c:316
 [<ffffffff81e1869f>] kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:374
 [<ffffffff81e152c4>] kobject_cleanup lib/kobject.c:630 [inline]
 [<ffffffff81e152c4>] kobject_release+0x144/0x1b0 lib/kobject.c:672
 [<ffffffff81e14ee2>] kref_sub include/linux/kref.h:73 [inline]
 [<ffffffff81e14ee2>] kref_put include/linux/kref.h:98 [inline]
 [<ffffffff81e14ee2>] kobject_put+0x72/0xd0 lib/kobject.c:689
 [<ffffffff82fd840d>] netdev_queue_update_kobjects+0x18d/0x290 net/core/net-sysfs.c:1327
 [<ffffffff82f71267>] netif_set_real_num_tx_queues+0x187/0x620 net/core/dev.c:2198
 [<ffffffff8274de40>] tun_set_real_num_queues drivers/net/tun.c:482 [inline]
 [<ffffffff8274de40>] __tun_detach+0x6b0/0xa10 drivers/net/tun.c:536
 [<ffffffff8274e1e4>] tun_detach drivers/net/tun.c:557 [inline]
 [<ffffffff8274e1e4>] tun_chr_close+0x44/0x60 drivers/net/tun.c:2261
 [<ffffffff81522da5>] __fput+0x235/0x6f0 fs/file_table.c:208
 [<ffffffff815232e5>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8118bd7f>] task_work_run+0x10f/0x190 kernel/task_work.c:115
 [<ffffffff81135285>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff81135285>] do_exit+0x9e5/0x26b0 kernel/exit.c:759
 [<ffffffff8113b1d1>] do_group_exit+0x111/0x330 kernel/exit.c:889
 [<ffffffff8115e5cc>] get_signal+0x4ec/0x14b0 kernel/signal.c:2321
 [<ffffffff8100e02b>] do_signal+0x8b/0x1d30 arch/x86/kernel/signal.c:712
 [<ffffffff8100360a>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:248
 [<ffffffff81006535>] prepare_exit_to_usermode arch/x86/entry/common.c:283 [inline]
 [<ffffffff81006535>] syscall_return_slowpath+0x1b5/0x1f0 arch/x86/entry/common.c:348
 [<ffffffff838c29b5>] int_ret_from_sys_call+0x25/0xa3

The buggy address belongs to the object at ffff88009afbf180
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes inside of
 512-byte region [ffff88009afbf180, ffff88009afbf380)
The buggy address belongs to the page:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.4.136-ge4798d7 #60
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9a41800 task.stack: ffff8801d9a50000
RIP: 0010:[<ffffffff81e1eb40>]  [<ffffffff81e1eb40>] __rb_insert lib/rbtree.c:120 [inline]
RIP: 0010:[<ffffffff81e1eb40>]  [<ffffffff81e1eb40>] rb_insert_color+0xa0/0xca0 lib/rbtree.c:420
RSP: 0018:ffff8801db307ce0  EFLAGS: 00010003
RAX: 0a0508a8e82a0be9 RBX: ffffffff83aa9ee0 RCX: ffffffff83aa9ee0
RDX: 1ffffffff07553dd RSI: ffff8801db319710 RDI: ffff8801db319c40
RBP: ffff8801db307d20 R08: 0000000000000096 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8801d9a41800 R12: ffff8801c8ef7b08
R13: ffff8801db319c40 R14: 5028454741505f4e R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fca5c62d000 CR3: 00000000b619b000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff844bdba0 0000000000000000 ffff8801db307d30 ffff8801db319c40
 dffffc0000000000 0000000000000000 ffff8801db319710 ffff8801c8ef7b10
 ffff8801db307d70 ffffffff81e2c7b7 ffff8801db319c58 ffff8801db319710
Call Trace:
 <IRQ> 
 [<ffffffff81e2c7b7>] timerqueue_add+0x157/0x2b0 lib/timerqueue.c:57
 [<ffffffff8129b35f>] enqueue_hrtimer+0x15f/0x440 kernel/time/hrtimer.c:893
 [<ffffffff8129e052>] __run_hrtimer kernel/time/hrtimer.c:1276 [inline]
 [<ffffffff8129e052>] __hrtimer_run_queues+0x6b2/0x1000 kernel/time/hrtimer.c:1325
 [<ffffffff8129f4c1>] hrtimer_interrupt+0x1b1/0x430 kernel/time/hrtimer.c:1359
 [<ffffffff810ad614>] local_apic_timer_interrupt+0x74/0xa0 arch/x86/kernel/apic/apic.c:901
 [<ffffffff838c544c>] smp_apic_timer_interrupt+0x7c/0xa0 arch/x86/kernel/apic/apic.c:925
 [<ffffffff838c4390>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:741
 <EOI> 
 [<ffffffff81025da5>] arch_safe_halt arch/x86/include/asm/paravirt.h:117 [inline]
 [<ffffffff81025da5>] default_idle+0x55/0x3c0 arch/x86/kernel/process.c:290
 [<ffffffff810272f0>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:281
 [<ffffffff8121bc07>] default_idle_call+0x57/0x70 kernel/sched/idle.c:93
 [<ffffffff8121c3af>] cpuidle_idle_call kernel/sched/idle.c:157 [inline]
 [<ffffffff8121c3af>] cpu_idle_loop kernel/sched/idle.c:253 [inline]
 [<ffffffff8121c3af>] cpu_startup_entry+0x6af/0x780 kernel/sched/idle.c:301
 [<ffffffff810aa1e4>] start_secondary+0x324/0x400 arch/x86/kernel/smpboot.c:242
Code: 48 89 c2 48 c1 ea 03 42 80 3c 3a 00 0f 85 c5 06 00 00 4c 8b 73 08 4d 39 e6 0f 84 85 01 00 00 4d 85 f6 74 1c 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 0f 85 56 07 00 00 41 f6 06 01 0f 84 0a 05 00 00 
RIP  [<ffffffff81e1eb40>] __rb_insert lib/rbtree.c:120 [inline]
RIP  [<ffffffff81e1eb40>] rb_insert_color+0xa0/0xca0 lib/rbtree.c:420
 RSP <ffff8801db307ce0>
---[ end trace 2b1fae10725f2929 ]---