==================================================================
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 1536 at addr ffff8801c8863b98 by task syz-executor2/4087

CPU: 0 PID: 4087 Comm: syz-executor2 Not tainted 4.4.132-g9ff3cfc #46
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 76c75cc9d210dda4 ffff8801c712f6c0 ffffffff81e0df8d
 ffffea0007221880 ffff8801c8863b98 0000000000000000 ffff8801c8863d80
 ffff8801c8863b80 ffff8801c712f6f8 ffffffff8151526c ffff8801c8863b98
Call Trace:
 [<ffffffff81e0df8d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0df8d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff8151526c>] print_address_description+0x6c/0x216 mm/kasan/report.c:252
 [<ffffffff8151558b>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff8151558b>] kasan_report.cold.7+0x175/0x2f7 mm/kasan/report.c:408
 [<ffffffff814f800f>] check_memory_region_inline mm/kasan/kasan.c:325 [inline]
 [<ffffffff814f800f>] check_memory_region+0x14f/0x1b0 mm/kasan/kasan.c:332
 [<ffffffff814f8553>] memcpy+0x23/0x50 mm/kasan/kasan.c:367
 [<ffffffff835851cd>] pfkey_msg2xfrm_state net/key/af_key.c:1227 [inline]
 [<ffffffff835851cd>] pfkey_add+0x145d/0x3220 net/key/af_key.c:1506
 [<ffffffff83589861>] pfkey_process+0x671/0x740 net/key/af_key.c:2834
 [<ffffffff8358b096>] pfkey_sendmsg+0x346/0xae0 net/key/af_key.c:3678
 [<ffffffff82f1cdac>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1cdac>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1e875>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f20916>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff8300a54a>] C_SYSC_sendmsg net/compat.c:720 [inline]
 [<ffffffff8300a54a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:718
 [<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
 [<ffffffff838c1b6a>] sysenter_flags_fixed+0xd/0x17

Allocated by task 4087:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8133>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8417>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8417>] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814f8bf4>] kasan_krealloc+0x64/0x80 mm/kasan/kasan.c:654
 [<ffffffff814f1dea>] ksize+0x8a/0xf0 mm/slub.c:3727
 [<ffffffff82f36ca3>] __alloc_skb+0x133/0x600 net/core/skbuff.c:237
 [<ffffffff8358ae4e>] alloc_skb include/linux/skbuff.h:815 [inline]
 [<ffffffff8358ae4e>] pfkey_sendmsg+0xfe/0xae0 net/key/af_key.c:3665
 [<ffffffff82f1cdac>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82f1cdac>] sock_sendmsg+0xcc/0x110 net/socket.c:635
 [<ffffffff82f1e875>] ___sys_sendmsg+0x745/0x880 net/socket.c:1962
 [<ffffffff82f20916>] __sys_sendmsg+0xd6/0x190 net/socket.c:1996
 [<ffffffff8300a54a>] C_SYSC_sendmsg net/compat.c:720 [inline]
 [<ffffffff8300a54a>] compat_SyS_sendmsg+0x2a/0x40 net/compat.c:718
 [<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
 [<ffffffff838c1b6a>] sysenter_flags_fixed+0xd/0x17

Freed by task 2025:
 [<ffffffff810341d6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814f8133>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814f8a62>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814f8a62>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f5f64>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f5f64>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f5f64>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f5f64>] kfree+0xf4/0x310 mm/slub.c:3749
 [<ffffffff82f35d84>] skb_free_head net/core/skbuff.c:571 [inline]
 [<ffffffff82f35d84>] skb_release_data+0x304/0x3b0 net/core/skbuff.c:602
 [<ffffffff82f35e7a>] skb_release_all+0x4a/0x60 net/core/skbuff.c:661
 [<ffffffff82f36483>] __kfree_skb net/core/skbuff.c:675 [inline]
 [<ffffffff82f36483>] consume_skb+0xf3/0x3d0 net/core/skbuff.c:748
 [<ffffffff830b09b2>] netlink_broadcast_filtered+0x2b2/0x9c0 net/netlink/af_netlink.c:1479
 [<ffffffff81e173b8>] kobject_uevent_env+0x6d8/0xb80 lib/kobject_uevent.c:316
 [<ffffffff81e1787f>] kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:374
 [<ffffffff824af11a>] uevent_store+0x8a/0xe0 drivers/base/core.c:420
 [<ffffffff824aac8e>] dev_attr_store+0x5e/0x90 drivers/base/core.c:137
 [<ffffffff816a73e4>] sysfs_kf_write+0x114/0x180 fs/sysfs/file.c:141
 [<ffffffff816a4b83>] kernfs_fop_write+0x2b3/0x400 fs/kernfs/file.c:312
 [<ffffffff8151c46c>] __vfs_write+0x11c/0x3f0 fs/read_write.c:489
 [<ffffffff8151e241>] vfs_write+0x191/0x4e0 fs/read_write.c:538
 [<ffffffff81520849>] SYSC_write fs/read_write.c:585 [inline]
 [<ffffffff81520849>] SyS_write+0xd9/0x1c0 fs/read_write.c:577
 [<ffffffff838c0225>] entry_SYSCALL_64_fastpath+0x22/0x9e

The buggy address belongs to the object at ffff8801c8863b80
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
 512-byte region [ffff8801c8863b80, ffff8801c8863d80)
The buggy address belongs to the page:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4076 at kernel/locking/lockdep.c:973 lock_accessed kernel/locking/lockdep.c:973 [inline]()
WARNING: CPU: 1 PID: 4076 at kernel/locking/lockdep.c:973 __bfs+0x2aa/0x5f0 kernel/locking/lockdep.c:1040()