netlink: 48 bytes leftover after parsing attributes in process `syz.0.3986'.
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BUG: KASAN: use-after-free in xfrm_alloc_spi+0x570/0xf30
Read of size 4 at addr ffff8881000b0e44 by task syz.0.3986/21420

CPU: 1 UID: 0 PID: 21420 Comm: syz.0.3986 Not tainted 6.17.0-rc1-syzkaller-00207-g815957293639 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 xfrm_alloc_spi+0x570/0xf30
 xfrm_alloc_userspi+0x70b/0xc90
 xfrm_user_rcv_msg+0x7a3/0xab0
 netlink_rcv_skb+0x208/0x470
 xfrm_netlink_rcv+0x79/0x90
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff9e9f8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff9eae31038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff9ea1b5fa0 RCX: 00007ff9e9f8ebe9
RDX: 0000000000000000 RSI: 0000200000000340 RDI: 0000000000000006
RBP: 00007ff9ea011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff9ea1b6038 R14: 00007ff9ea1b5fa0 R15: 00007fff2ec332c8
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8881000b1200 pfn:0x1000b0
flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff)
raw: 057ff00000000000 ffffea0004a1b708 ffffea0004aa1508 0000000000000000
raw: ffff8881000b1200 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x40dc0(GFP_KERNEL|__GFP_ZERO|__GFP_COMP), pid 20926, tgid 20925 (syz.1.3858), ts 632762091067, free_ts 642746107555
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 ___kmalloc_large_node+0x5f/0x1b0
 __kmalloc_large_noprof+0x1a/0x90
 geneve_sock_add+0x2b4/0x910
 geneve_open+0xd2/0x140
 __dev_open+0x470/0x880
 netif_open+0xaa/0x170
 dev_open+0x125/0x260
 bond_enslave+0x111b/0x3a20
 do_set_master+0x533/0x6d0
 rtnl_newlink_create+0x677/0xb00
 rtnl_newlink+0x16d6/0x1c70
 rtnetlink_rcv_msg+0x7cf/0xb70
page last free pid 28 tgid 28 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 free_large_kmalloc+0x13a/0x1f0
 build_detached_freelist+0x22a/0x270
 kmem_cache_free_bulk+0xbe/0x520
 kvfree_rcu_bulk+0xe5/0x1f0
 kfree_rcu_work+0xed/0x170
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30

Memory state around the buggy address:
 ffff8881000b0d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881000b0d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881000b0e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                           ^
 ffff8881000b0e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881000b0f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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