==================================================================
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 8188 at addr ffff8800a2b57918 by task syz-executor2/24086

CPU: 0 PID: 24086 Comm: syz-executor2 Not tainted 4.4.133-g3f51ea2 #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 dfe5dac1228e9dde ffff8801d71876c0 ffffffff81e0e4cd
 ffffea00028ad580 ffff8800a2b57918 0000000000000000 ffff8800a2b57b00
 ffff8800a2b57900 ffff8801d71876f8 ffffffff815154cc ffff8800a2b57918
Call Trace:
 [<ffffffff81e0e4cd>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0e4cd>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff815154cc>] print_address_description+0x6c/0x216 mm/kasan/report.c:252
 [<ffffffff815157eb>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff815157eb>] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff814f826f>] check_memory_region_inline mm/kasan/kasan.c:325 [inline]
 [<ffffffff814f826f>] check_memory_region+0x14f/0x1b0 mm/kasan/kasan.c:332
 [<ffffffff814f87b3>] memcpy+0x23/0x50 mm/kasan/kasan.c:367
 [<ffffffff83586fb7>] pfkey_msg2xfrm_state net/key/af_key.c:1188 [inline]
 [<ffffffff83586fb7>] pfkey_add+0x2537/0x3220 net/key/af_key.c:1506
 [<ffffffff8358a571>] pfkey_process+0x671/0x740 net/key/af_key.c:2834
 [<ffffffff8358bda6>] pfkey_sendmsg+0x346/0xae0 net/key/af_key.c:3678
 [<ffffffff82f1d14c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1d14c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1ec15>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f20cb6>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff8300aa0a>] C_SYSC_sendmsg net/compat.c:722 [inline]
 [<ffffffff8300aa0a>] 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
 [<ffffffff838c28aa>] sysenter_flags_fixed+0xd/0x17

Allocated by task 24086:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8393>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8677>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8677>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f8e54>] kasan_krealloc+0x64/0x80 mm/kasan/kasan.c:654
 [<ffffffff814f204a>] ksize+0x8a/0xf0 mm/slub.c:3727
 [<ffffffff82f37043>] __alloc_skb+0x133/0x600 net/core/skbuff.c:237
 [<ffffffff8358bb5e>] alloc_skb include/linux/skbuff.h:815 [inline]
 [<ffffffff8358bb5e>] pfkey_sendmsg+0xfe/0xae0 net/key/af_key.c:3665
 [<ffffffff82f1d14c>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1d14c>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1ec15>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f20cb6>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff8300aa0a>] C_SYSC_sendmsg net/compat.c:722 [inline]
 [<ffffffff8300aa0a>] 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
 [<ffffffff838c28aa>] sysenter_flags_fixed+0xd/0x17

Freed by task 2024:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8393>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8cc2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8cc2>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f61c4>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f61c4>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f61c4>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f61c4>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff82f36124>] skb_free_head net/core/skbuff.c:571 [inline]
 [<ffffffff82f36124>] skb_release_data+0x304/0x3b0 net/core/skbuff.c:602
 [<ffffffff82f3621a>] skb_release_all+0x4a/0x60 net/core/skbuff.c:661
 [<ffffffff82f36823>] __kfree_skb net/core/skbuff.c:675 [inline]
 [<ffffffff82f36823>] consume_skb+0xf3/0x3d0 net/core/skbuff.c:748
 [<ffffffff830b0e72>] netlink_broadcast_filtered+0x2b2/0x9c0 net/netlink/af_netlink.c:1479
 [<ffffffff81e178f8>] kobject_uevent_env+0x6d8/0xb80 lib/kobject_uevent.c:316
 [<ffffffff81e17dbf>] kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:374
 [<ffffffff824af66a>] uevent_store+0x8a/0xe0 drivers/base/core.c:420
 [<ffffffff824ab1de>] dev_attr_store+0x5e/0x90 drivers/base/core.c:137
 [<ffffffff816a7724>] sysfs_kf_write+0x114/0x180 fs/sysfs/file.c:141
 [<ffffffff816a4ec3>] kernfs_fop_write+0x2b3/0x400 fs/kernfs/file.c:312
 [<ffffffff8151c6cc>] __vfs_write+0x11c/0x3f0 fs/read_write.c:489
 [<ffffffff8151e4a1>] vfs_write+0x191/0x4e0 fs/read_write.c:538
 [<ffffffff81520aa9>] SYSC_write fs/read_write.c:585 [inline]
 [<ffffffff81520aa9>] SyS_write+0xd9/0x1c0 fs/read_write.c:577
 [<ffffffff838c0f65>] entry_SYSCALL_64_fastpath+0x22/0x9e

The buggy address belongs to the object at ffff8800a2b57900
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
 512-byte region [ffff8800a2b57900, ffff8800a2b57b00)
The buggy address belongs to the page:
kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
BUG: unable to handle kernel paging request at ffff8801d4b7eaa0
IP: [<ffff8801d4b7eaa0>] 0xffff8801d4b7eaa0
PGD 632d067 PUD 80000001c00001e3 
Oops: 0011 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 24098 Comm: syz-executor3 Not tainted 4.4.133-g3f51ea2 #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801b0370000 task.stack: ffff8801baee8000
RIP: 0010:[<ffff8801d4b7eaa0>]  [<ffff8801d4b7eaa0>] 0xffff8801d4b7eaa0
RSP: 0018:ffff8801db307f08  EFLAGS: 00010046
RAX: ffff8801d4b7eaa0 RBX: ffff8801baeef538 RCX: 1ffffffff0942929
RDX: 1ffff1003a96fd4c RSI: ffff8801baeef538 RDI: ffff8801d4b7ea00
RBP: ffff8801db307f70 R08: ffff8801b0370900 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d4b7ea00
R13: ffff8801baeef5d0 R14: ffff8801baee8000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffff8801d4b7eaa0 CR3: 00000000a28de000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff81015b06 0000000000000082 ffff8801db307f58 ffffffff81e6e05b
 0000000000000000 ffffffff83a08cc0 00000000000000a1 0000000000000000
 ffff8801baeef538 00000000000000a1 ffff8801d4b7ea00 00000000000000a1
Call Trace:
 <IRQ> 
 [<ffffffff838c39d9>] do_IRQ+0x89/0x1c0 arch/x86/kernel/irq.c:239
 [<ffffffff838c1ae0>] common_interrupt+0xa0/0xa0 arch/x86/entry/entry_64.S:596
 <EOI> 
Code: 00 00 00 80 d5 8a 02 00 ea ff ff 00 00 00 00 00 00 00 00 e0 9b aa 83 ff ff ff ff 00 79 b5 a2 00 88 ff ff 00 7b b5 a2 00 88 ff ff <e0> ea b7 d4 01 88 ff ff 07 cc 48 81 ff ff ff ff ff ff ff ff ff 
RIP  [<ffff8801d4b7eaa0>] 0xffff8801d4b7eaa0
 RSP <ffff8801db307f08>
CR2: ffff8801d4b7eaa0
---[ end trace b6aeb3d8618c950f ]---