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BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x696/0xca0
Write of size 8 at addr ffff888122b35b30 by task syz.0.2584/15446

CPU: 1 UID: 0 PID: 15446 Comm: syz.0.2584 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:__sanitizer_cov_trace_const_cmp8+0x0/0x90
Code: 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 60 a0 92 65 8b 15 08 b0
RSP: 0018:ffffc9000b0c72c8 EFLAGS: 00000246
RAX: ffffffff8211c6ac RBX: ffffea0000c15fc0 RCX: ffff888109328000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: ffff888109328000 R09: 0000000000000003
R10: 0000000000000002 R11: 0000000000000000 R12: ffffea0000c15fc0
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
 __folio_rmap_sanity_checks+0x400/0x7d0
 folio_remove_rmap_ptes+0x3b/0xaf0
 unmap_page_range+0x1f7f/0x4370
 unmap_vmas+0x399/0x580
 exit_mmap+0x248/0xb50
 __mmput+0x118/0x420
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff06078ebe9
Code: Unable to access opcode bytes at 0x7ff06078ebbf.
RSP: 002b:00007ff0616b9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 000000000000003c RBX: 00007ff0609b5fa0 RCX: 00007ff06078ebe9
RDX: 0000000004000004 RSI: 0000200000000380 RDI: 0000000000000003
RBP: 00007ff060811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff0609b6038 R14: 00007ff0609b5fa0 R15: 00007ffd9000b4b8
 </TASK>

Allocated by task 12488:
 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 5892:
 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 ffff888122b35b00
 which belongs to the cache xfrm_state of size 928
The buggy address is located 48 bytes inside of
 freed 928-byte region [ffff888122b35b00, ffff888122b35ea0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x122b34
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 ffff88801bff6c80 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800e000e 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff88801bff6c80 dead000000000122 0000000000000000
head: 0000000000000000 00000000800e000e 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea00048acd01 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 5971, tgid 5970 (syz.1.14), ts 46893078333, free_ts 46868024903
 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
 kmem_cache_alloc_noprof+0x283/0x3c0
 xfrm_state_alloc+0x24/0x2f0
 xfrm_add_sa+0x17d1/0x4070
 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
page last free pid 13 tgid 13 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 stack_depot_save_flags+0x436/0x860
 kasan_save_track+0x4f/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 mld_newpack+0x13c/0xc40
 add_grhead+0x5a/0x2a0
 add_grec+0x1452/0x1740
 mld_send_report+0x1ed/0x380
 ipv6_mc_netdev_event+0x1b7/0x5a0
 notifier_call_chain+0x1b6/0x3e0
 call_netdevice_notifiers+0x88/0xc0
 bond_resend_igmp_join_requests_delayed+0x61/0x170
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0

Memory state around the buggy address:
 ffff888122b35a00: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888122b35a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888122b35b00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888122b35b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888122b35c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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