==================================================================
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 3520 at addr ffff8800a1f36540 by task syz-executor2/412

CPU: 0 PID: 412 Comm: syz-executor2 Not tainted 4.4.136-gfb7e319 #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 2b8dbe14fcdff64d ffff8800b38a76c0 ffffffff81e0edad
 ffffea000287cd80 ffff8800a1f36540 0000000000000000 ffff8800a1f36700
 ffff8800a1f36500 ffff8800b38a76f8 ffffffff815159b6 ffff8800a1f36540
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
 [<ffffffff8300bb8a>] C_SYSC_sendmsg net/compat.c:722 [inline]
 [<ffffffff8300bb8a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:720
 [<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
 [<ffffffff838c416a>] sysenter_flags_fixed+0xd/0x17

Allocated by task 412:
 [<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
 [<ffffffff8300bb8a>] C_SYSC_sendmsg net/compat.c:722 [inline]
 [<ffffffff8300bb8a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:720
 [<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
 [<ffffffff838c416a>] sysenter_flags_fixed+0xd/0x17

Freed by task 32081:
 [<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
 [<ffffffff82f372f5>] __kfree_skb+0x15/0x20 net/core/skbuff.c:675
 [<ffffffff82f373f7>] kfree_skb+0xf7/0x3e0 net/core/skbuff.c:696
 [<ffffffff83415a85>] unix_release_sock+0x4b5/0xa00 net/unix/af_unix.c:559
 [<ffffffff83416014>] unix_release+0x44/0x90 net/unix/af_unix.c:835
 [<ffffffff82f1a156>] sock_release+0x96/0x1c0 net/socket.c:586
 [<ffffffff82f1a296>] sock_close+0x16/0x20 net/socket.c:1037
 [<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
 [<ffffffff81007090>] prepare_exit_to_usermode arch/x86/entry/common.c:283 [inline]
 [<ffffffff81007090>] syscall_return_slowpath arch/x86/entry/common.c:348 [inline]
 [<ffffffff81007090>] do_syscall_32_irqs_on arch/x86/entry/common.c:398 [inline]
 [<ffffffff81007090>] do_fast_syscall_32+0x620/0x8b0 arch/x86/entry/common.c:459
 [<ffffffff838c416a>] sysenter_flags_fixed+0xd/0x17

The buggy address belongs to the object at ffff8800a1f36500
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes inside of
 512-byte region [ffff8800a1f36500, ffff8800a1f36700)
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-gfb7e319 #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9a41800 task.stack: ffff8801d9a50000
RIP: 0010:[<ffffffff81e708a1>]  [<ffffffff81e708a1>] lookup_object lib/debugobjects.c:120 [inline]
RIP: 0010:[<ffffffff81e708a1>]  [<ffffffff81e708a1>] debug_object_deactivate+0x191/0x340 lib/debugobjects.c:465
RSP: 0018:ffff8801db307cf0  EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 4000000000004080 RCX: 0800000000000813
RDX: 1ffffffff0b4401f RSI: ffffffff844c6720 RDI: 4000000000004098
RBP: ffff8801db307da8 R08: ffffffff8533dfd0 R09: 0000000000000001
R10: 0000000000000001 R11: ffff8801d9a41800 R12: 1ffff1003b660fa0
R13: ffffffff85a200e8 R14: ffff8801b6877d28 R15: 0000000000000003
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000008350008 CR3: 00000001bf00c000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000092 ffffffff844c6720 0000000041b58ab3 ffffffff84209587
 ffffffff81e70710 ffff8801d9a41800 ffffed003b34841b ffff8801d9a420e0
 ffff8801db319658 0000000000000000 ffff8801db307d80 ffffffff81229682
Call Trace:
 <IRQ> 
 [<ffffffff8129dbc2>] debug_hrtimer_deactivate kernel/time/hrtimer.c:415 [inline]
 [<ffffffff8129dbc2>] debug_deactivate kernel/time/hrtimer.c:462 [inline]
 [<ffffffff8129dbc2>] __run_hrtimer kernel/time/hrtimer.c:1230 [inline]
 [<ffffffff8129dbc2>] __hrtimer_run_queues+0x222/0x1000 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: a9 01 00 00 48 8b 1b 41 bf 01 00 00 00 48 85 db 74 42 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 41 83 c7 01 48 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 0c 01 00 00 4c 3b 73 18 74 7d 48 89 d9 48 c1 
RIP  [<ffffffff81e708a1>] lookup_object lib/debugobjects.c:120 [inline]
RIP  [<ffffffff81e708a1>] debug_object_deactivate+0x191/0x340 lib/debugobjects.c:465
 RSP <ffff8801db307cf0>
---[ end trace da6d5a2673bd7b5f ]---