==================================================================
BUG: KASAN: global-out-of-bounds in xfrm_alloc_spi+0x570/0xf30
Read of size 4 at addr ffffffff8f5477b4 by task syz.1.8079/5420

CPU: 0 UID: 0 PID: 5420 Comm: syz.1.8079 Not tainted syzkaller #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: 0033:0x7f348238ebe9
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:00007f34832b7038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f34825b5fa0 RCX: 00007f348238ebe9
RDX: 0000000000000000 RSI: 00002000000004c0 RDI: 0000000000000004
RBP: 00007f3482411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f34825b6038 R14: 00007f34825b5fa0 R15: 00007ffd042044b8
 </TASK>

The buggy address belongs to the variable:
 dev_attr_carrier_up_count+0x54/0x60

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf547
flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002000 ffffea00003d51c8 ffffea00003d51c8 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffffffff8f547680: f9 f9 f9 f9 00 00 00 00 00 00 00 f9 f9 f9 f9 f9
 ffffffff8f547700: 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 00 00 00 00
>ffffffff8f547780: 00 00 00 f9 f9 f9 f9 f9 00 00 00 00 00 00 00 f9
                                     ^
 ffffffff8f547800: f9 f9 f9 f9 00 00 00 00 00 00 00 f9 f9 f9 f9 f9
 ffffffff8f547880: 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 00 00 00 00
==================================================================
