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BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x696/0xca0
Write of size 8 at addr ffff88801ee0bab0 by task syz.0.2262/12896

CPU: 0 UID: 0 PID: 12896 Comm: syz.0.2262 Not tainted 6.16.0-syzkaller-06574-gd9104cec3e8f-dirty #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:seqcount_lockdep_reader_access+0x129/0x180
Code: c7 b0 ff 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b 41 f7 c5 00 02 00 00 74 01 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 66 43 c7 44 27 09 00 00 43 c6 44 27 0b 00
RSP: 0000:ffffc90007a17420 EFLAGS: 00000206
RAX: 69d3869767f98600 RBX: ffff88805fffbc58 RCX: 69d3869767f98600
RDX: 0000000000000007 RSI: ffffffff8d979100 RDI: ffffffff8be30a00
RBP: ffffc90007a174c8 R08: ffffffff8fa07af7 R09: 1ffffffff1f40f5e
R10: dffffc0000000000 R11: fffffbfff1f40f5f R12: dffffc0000000000
R13: 0000000000000a06 R14: ffffffff82166dcb R15: 1ffff92000f42e84
 bad_range+0x8b/0x2c0
 get_page_from_freelist+0x21c2/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 vma_alloc_folio_noprof+0xe4/0x200
 folio_prealloc+0x30/0x180
 do_wp_page+0x1231/0x5800
 __handle_mm_fault+0x1144/0x5620
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f20a3064bd7
Code: 0f 85 11 0e 00 00 4c 89 44 24 28 31 c0 b9 40 42 0f 00 48 89 de ba 81 00 00 00 bf ca 00 00 00 c7 03 01 00 00 00 e8 f9 9f 12 00 <83> 05 ce 31 35 00 01 4c 8b 44 24 28 80 bc 24 e8 00 00 00 00 0f b6
RSP: 002b:00007ffece4ba5b0 EFLAGS: 00010207
RAX: 0000000000000001 RBX: 00007f20a33b5fa8 RCX: 00007f20a318ebe9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f20a33b5fa8
RBP: 0000000000000000 R08: 00007ffece4ba447 R09: 00000001ce4ba89f
R10: 00007f20a33b5fa0 R11: 0000000000000246 R12: 00007f20a33b5fac
R13: 00007f20a33b5fa0 R14: 0000000000001c4a R15: 0000000000000003
 </TASK>

Allocated by task 10569:
 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 2279:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kmem_cache_free+0x18f/0x400
 xfrm_state_gc_task+0x518/0x6a0
 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 ffff88801ee0ba80
 which belongs to the cache xfrm_state of size 928
The buggy address is located 48 bytes inside of
 freed 928-byte region [ffff88801ee0ba80, ffff88801ee0be20)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88801ee0ba80 pfn:0x1ee08
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888104b0a780 dead000000000122 0000000000000000
raw: ffff88801ee0ba80 00000000800e000a 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888104b0a780 dead000000000122 0000000000000000
head: ffff88801ee0ba80 00000000800e000a 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea00007b8201 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 5987, tgid 5986 (syz.0.37), ts 51485835523, free_ts 51445879107
 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/0x3b0
 ___slab_alloc+0xbfc/0x1480
 kmem_cache_alloc_noprof+0x283/0x3c0
 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
page last free pid 5985 tgid 5984 stack trace:
 __free_frozen_pages+0xc71/0xe70
 stack_depot_save_flags+0x445/0x900
 kasan_save_track+0x4f/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 sock_kmalloc+0xd6/0x160
 alg_setkey+0x55/0x190
 alg_setsockopt+0x3da/0x4a0
 do_sock_setsockopt+0x17c/0x1b0
 __x64_sys_setsockopt+0x13f/0x1b0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88801ee0b980: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801ee0ba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801ee0ba80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88801ee0bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801ee0bb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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