==================================================================
BUG: KASAN: slab-out-of-bounds in pfkey_msg2xfrm_state net/key/af_key.c:1188 [inline]
BUG: KASAN: slab-out-of-bounds in pfkey_add+0x2537/0x3220 net/key/af_key.c:1506
Read of size 4898 at addr ffff8801abf6cf18 by task syz-executor1/15991

CPU: 0 PID: 15991 Comm: syz-executor1 Not tainted 4.4.135-ge75204c #53
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 231bebb4592e8733 ffff8801baf9f6c0 ffffffff81e0ed0d
 ffffea0006afdb00 ffff8801abf6cf18 0000000000000000 ffff8801abf6d100
 ffff8801abf6cf00 ffff8801baf9f6f8 ffffffff81515946 ffff8801abf6cf18
Call Trace:
 [<ffffffff81e0ed0d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0ed0d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81515946>] print_address_description+0x6c/0x216 mm/kasan/report.c:252
 [<ffffffff81515c65>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff81515c65>] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff814f86df>] check_memory_region_inline mm/kasan/kasan.c:325 [inline]
 [<ffffffff814f86df>] check_memory_region+0x14f/0x1b0 mm/kasan/kasan.c:332
 [<ffffffff814f8c23>] memcpy+0x23/0x50 mm/kasan/kasan.c:367
 [<ffffffff83588787>] pfkey_msg2xfrm_state net/key/af_key.c:1188 [inline]
 [<ffffffff83588787>] pfkey_add+0x2537/0x3220 net/key/af_key.c:1506
 [<ffffffff8358bd41>] pfkey_process+0x671/0x740 net/key/af_key.c:2834
 [<ffffffff8358d576>] pfkey_sendmsg+0x346/0xae0 net/key/af_key.c:3678
 [<ffffffff82f1e15c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e15c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1fc25>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'.
 [<ffffffff82f21cc6>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff8300baea>] C_SYSC_sendmsg net/compat.c:722 [inline]
 [<ffffffff8300baea>] 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
 [<ffffffff838c40aa>] sysenter_flags_fixed+0xd/0x17

Allocated by task 15991:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8803>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8ae7>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8ae7>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f92c4>] kasan_krealloc+0x64/0x80 mm/kasan/kasan.c:654
 [<ffffffff814f24ba>] ksize+0x8a/0xf0 mm/slub.c:3727
 [<ffffffff82f38053>] __alloc_skb+0x133/0x600 net/core/skbuff.c:237
 [<ffffffff8358d32e>] alloc_skb include/linux/skbuff.h:815 [inline]
 [<ffffffff8358d32e>] pfkey_sendmsg+0xfe/0xae0 net/key/af_key.c:3665
 [<ffffffff82f1e15c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1e15c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1fc25>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f21cc6>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff8300baea>] C_SYSC_sendmsg net/compat.c:722 [inline]
 [<ffffffff8300baea>] 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
 [<ffffffff838c40aa>] sysenter_flags_fixed+0xd/0x17

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801abf6cf00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
 512-byte region [ffff8801abf6cf00, ffff8801abf6d100)
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 4.4.135-ge75204c #53
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9a41800 task.stack: ffff8801d9a50000
RIP: 0010:[<ffffffff81e1fdc1>]  [<ffffffff81e1fdc1>] rb_set_parent_color include/linux/rbtree_augmented.h:117 [inline]
RIP: 0010:[<ffffffff81e1fdc1>]  [<ffffffff81e1fdc1>] ____rb_erase_color lib/rbtree.c:345 [inline]
RIP: 0010:[<ffffffff81e1fdc1>]  [<ffffffff81e1fdc1>] rb_erase+0x721/0x1cb0 lib/rbtree.c:429
RSP: 0018:ffff8801db307cf8  EFLAGS: 00010082
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff8801baa17d38
RDX: ffffed003b6632e2 RSI: ffff8801db319710 RDI: 0000000000000000
RBP: ffff8801db307d40 R08: ffffffff8533dfd0 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8801d9a41800 R12: ffff8801baa17d28
R13: ffff8801baa17d29 R14: ffffea0006afdb08 R15: ffffea0006afdb00
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f57a6db0 CR3: 00000001d8403000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff844c6720 ffff8801d9a41800 ffffed003b34841b ffff8801d9a420e0
 ffff8801d437fd28 ffff8801db319710 ffff8801db319718 0000000000000000
 0000000000000000 ffff8801db307d70 ffffffff81e2c928 ffffffff844bdba0
Call Trace:
 <IRQ> 
 [<ffffffff81e2c928>] timerqueue_del+0x78/0x170 lib/timerqueue.c:86
 [<ffffffff8129bc4e>] __remove_hrtimer+0x8e/0x250 kernel/time/hrtimer.c:917
 [<ffffffff8129dc7d>] __run_hrtimer kernel/time/hrtimer.c:1242 [inline]
 [<ffffffff8129dc7d>] __hrtimer_run_queues+0x2dd/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
 [<ffffffff838c538c>] smp_apic_timer_interrupt+0x7c/0xa0 arch/x86/kernel/apic/apic.c:925
 [<ffffffff838c42d0>] 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: 15 00 00 4c 89 f7 49 89 44 24 10 48 c1 ef 03 80 3c 1f 00 0f 85 fd 14 00 00 48 89 c7 4d 89 e5 4d 89 67 08 48 c1 ef 03 49 83 cd 01 <80> 3c 1f 00 0f 85 95 0f 00 00 4c 89 e7 4c 89 28 48 c1 ef 03 80 
RIP  [<ffffffff81e1fdc1>] rb_set_parent_color include/linux/rbtree_augmented.h:117 [inline]
RIP  [<ffffffff81e1fdc1>] ____rb_erase_color lib/rbtree.c:345 [inline]
RIP  [<ffffffff81e1fdc1>] rb_erase+0x721/0x1cb0 lib/rbtree.c:429
 RSP <ffff8801db307cf8>
---[ end trace 2f5e7673547d0af2 ]---