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BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x696/0xca0
Write of size 8 at addr ffff88811037ed30 by task syz.9.2750/12516

CPU: 1 UID: 0 PID: 12516 Comm: syz.9.2750 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:
 <IRQ>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 __xfrm_state_delete+0x696/0xca0
 xfrm_timer_handler+0x18f/0xa00
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 ab 38 14 f6 e8 d6 94 4b f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0000:ffffc9000275fc00 EFLAGS: 00000286
RAX: eb05068ee94c6d00 RBX: 0000000000000000 RCX: eb05068ee94c6d00
RDX: 0000000000000000 RSI: ffffffff8d9b9aad RDI: 0000000000000001
RBP: ffffc9000275fcb0 R08: ffffffff8fa39037 R09: 1ffffffff1f47206
R10: dffffc0000000000 R11: fffffbfff1f47207 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920004ebf80
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sw_hweight64+0x1/0x70
Code: d0 25 0f 0f 0f 0f 69 c0 01 01 01 01 c1 e8 18 5a c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 57 <52> 48 89 fa 48 b8 55 55 55 55 55 55 55 55 48 d1 ea 48 21 d0 48 ba
RSP: 0000:ffffc9000275fd70 EFLAGS: 00000246
RAX: 1ffff11020d5429a RBX: ffff888106aa14d0 RCX: dffffc0000000000
RDX: 0000000000000003 RSI: ffffffff8dba8ffd RDI: 0000000000000003
RBP: ffffc9000275fe50 R08: 0000000000000000 R09: ffffffff8191c8ef
R10: dffffc0000000000 R11: fffffbfff1f47207 R12: 0000000000000002
R13: ffff888106aa0b88 R14: ffff88802f51ebd4 R15: ffffe8ffffc23db0
 task_mm_cid_work+0x5c4/0x760
 task_work_run+0x1d4/0x260
 resume_user_mode_work+0x5e/0x80
 irqentry_exit_to_user_mode+0x90/0x120
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0033:0x7f9a4fc54397
Code: 83 c4 08 c3 0f 1f 80 00 00 00 00 48 83 ec 08 48 89 f2 48 63 ff 4c 89 d6 41 51 31 c0 4d 89 c1 49 89 c8 4c 89 d9 e8 f9 a7 13 00 <5a> 59 48 83 c4 08 c3 66 90 41 57 41 56 41 55 49 89 f5 41 54 49 29
RSP: 002b:00007f9a50b52040 EFLAGS: 00000203
RAX: 0000000000000005 RBX: 00007f9a4ffd5fa0 RCX: 00007f9a4fd8eba9
RDX: affffff7ffffffff RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007f9a4fe11e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9a4ffd6038 R14: 00007f9a4ffd5fa0 R15: 00007ffcae0894c8
 </TASK>

Allocated by task 11072:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 xfrm_state_alloc+0x24/0x2f0
 __find_acq_core+0x8a7/0x1c00
 xfrm_find_acq+0x78/0xa0
 xfrm_alloc_userspi+0x6b3/0xc90
 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

Freed by task 47:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free+0x18f/0x400
 xfrm_state_gc_task+0x52d/0x6b0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30

The buggy address belongs to the object at ffff88811037ed00
 which belongs to the cache xfrm_state of size 928
The buggy address is located 48 bytes inside of
 freed 928-byte region [ffff88811037ed00, ffff88811037f0a0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88811037df80 pfn:0x11037c
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff88801af67640 dead000000000122 0000000000000000
raw: ffff88811037df80 00000000800e000c 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff88801af67640 dead000000000122 0000000000000000
head: ffff88811037df80 00000000800e000c 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea000440df01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 6400, tgid 6399 (syz.5.151), ts 107424319460, free_ts 107421246591
 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/0x1420
 kmem_cache_alloc_noprof+0x283/0x3c0
 xfrm_state_alloc+0x24/0x2f0
 pfkey_add+0x6e4/0x2e00
 pfkey_sendmsg+0xbfe/0x1090
 __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
page last free pid 6267 tgid 6267 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __slab_free+0x303/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_noprof+0x224/0x4f0
 tomoyo_realpath_from_path+0xe3/0x5d0
 tomoyo_path_perm+0x213/0x4b0
 security_inode_getattr+0x12f/0x330
 vfs_fstatat+0xb1/0x170
 __x64_sys_newfstatat+0x116/0x190
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88811037ec00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811037ec80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811037ed00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88811037ed80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811037ee00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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