==================================================================
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 5172 at addr ffff8800b69ee040 by task syz-executor5/9855

CPU: 1 PID: 9855 Comm: syz-executor5 Not tainted 4.4.135-g6cdd987d #56
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 06645b011bb4becc ffff8800a13ef740 ffffffff81e0ed0d
 ffffea0002da7b80 ffff8800b69ee040 0000000000000000 ffff8800b69ee200
 ffff8800b69ee000 ffff8800a13ef778 ffffffff81515946 ffff8800b69ee040
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
 [<ffffffff835876ad>] pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline]
 [<ffffffff835876ad>] pfkey_add+0x145d/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
 [<ffffffff82f21cc6>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff82f21dad>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82f21dad>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff838c2765>] entry_SYSCALL_64_fastpath+0x22/0x9e

Allocated by task 9855:
 [<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
 [<ffffffff82f21dad>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82f21dad>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff838c2765>] entry_SYSCALL_64_fastpath+0x22/0x9e

Freed by task 2025:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8803>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f9132>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f9132>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f6634>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f6634>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f6634>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f6634>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff82f37134>] skb_free_head net/core/skbuff.c:571 [inline]
 [<ffffffff82f37134>] skb_release_data+0x304/0x3b0 net/core/skbuff.c:602
 [<ffffffff82f3722a>] skb_release_all+0x4a/0x60 net/core/skbuff.c:661
 [<ffffffff82f37833>] __kfree_skb net/core/skbuff.c:675 [inline]
 [<ffffffff82f37833>] consume_skb+0xf3/0x3d0 net/core/skbuff.c:748
 [<ffffffff830b1f52>] netlink_broadcast_filtered+0x2b2/0x9c0 net/netlink/af_netlink.c:1479
 [<ffffffff81e18138>] kobject_uevent_env+0x6d8/0xb80 lib/kobject_uevent.c:316
 [<ffffffff81e185ff>] kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:374
 [<ffffffff824b000a>] uevent_store+0x8a/0xe0 drivers/base/core.c:420
 [<ffffffff824abb7e>] dev_attr_store+0x5e/0x90 drivers/base/core.c:137
 [<ffffffff816a8084>] sysfs_kf_write+0x114/0x180 fs/sysfs/file.c:141
 [<ffffffff816a5823>] kernfs_fop_write+0x2b3/0x400 fs/kernfs/file.c:312
 [<ffffffff8151cb4c>] __vfs_write+0x11c/0x3f0 fs/read_write.c:489
 [<ffffffff8151e921>] vfs_write+0x191/0x4e0 fs/read_write.c:538
 [<ffffffff81520f29>] SYSC_write fs/read_write.c:585 [inline]
 [<ffffffff81520f29>] SyS_write+0xd9/0x1c0 fs/read_write.c:577
 [<ffffffff838c2765>] entry_SYSCALL_64_fastpath+0x22/0x9e

The buggy address belongs to the object at ffff8800b69ee000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes inside of
 512-byte region [ffff8800b69ee000, ffff8800b69ee200)
The buggy address belongs to the page:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9824 at lib/list_debug.c:62 __list_del_entry+0x162/0x1c0 lib/list_debug.c:60()
list_del corruption. next->prev should be ffff8801d71c4140, but was ffffffff83aa9ee0