netlink: 'syz.0.2047': attribute type 29 has an invalid length.
netlink: 500 bytes leftover after parsing attributes in process `syz.0.2047'.
==================================================================
BUG: KASAN: slab-out-of-bounds in xfrm_alloc_spi+0x51c/0xf30
Read of size 8 at addr ffff888038307aa8 by task syz.0.2047/13220

CPU: 1 UID: 0 PID: 13220 Comm: syz.0.2047 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+0x51c/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: 0033:0x7f1c1198ebe9
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:00007f1c12775038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1c11bb5fa0 RCX: 00007f1c1198ebe9
RDX: 0000000000000000 RSI: 0000200000000840 RDI: 0000000000000006
RBP: 00007f1c11a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1c11bb6038 R14: 00007f1c11bb5fa0 R15: 00007fff5a3aae48
 </TASK>

Allocated by task 13209:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 security_sk_alloc+0x52/0x390
 sk_prot_alloc+0x101/0x220
 sk_alloc+0x3a/0x370
 __netlink_create+0x65/0x260
 netlink_create+0x3ca/0x590
 __sock_create+0x4b3/0x9f0
 __sys_socket+0xd7/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 15:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 security_sk_free+0xa4/0x1b0
 __sk_destruct+0x49b/0x660
 rcu_core+0xcab/0x1770
 handle_softirqs+0x286/0x870
 run_ksoftirqd+0x9b/0x100
 smpboot_thread_fn+0x542/0xa60
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30

The buggy address belongs to the object at ffff888038307a80
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 8 bytes to the right of
 allocated 32-byte region [ffff888038307a80, ffff888038307aa0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x38307
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801a441780 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP), pid 13200, tgid 13200 (syz.0.2043), ts 155897298056, free_ts 155896165920
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x370
 ___slab_alloc+0xbeb/0x1410
 __kmalloc_cache_noprof+0x296/0x3d0
 kmem_cache_free+0x166/0x400
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x21f7/0x2200
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 13200 tgid 13200 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 tlb_finish_mmu+0x112/0x1d0
 exit_mmap+0x44c/0xb50
 __mmput+0x118/0x420
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x21f7/0x2200
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888038307980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
 ffff888038307a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
>ffff888038307a80: fa fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc
                                  ^
 ffff888038307b00: fa fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc
 ffff888038307b80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
==================================================================
