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BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x696/0xca0
Write of size 8 at addr ffff888047001230 by task syz-executor/5832

CPU: 0 UID: 0 PID: 5832 Comm: syz-executor Not tainted 6.16.0-syzkaller-06600-g1dbf1d590d10-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:exit_to_user_mode_loop+0x45/0x110
Code: eb 1e e8 8e a7 c5 09 65 48 8b 04 25 08 00 9a 92 4c 8b 30 41 f7 c6 1e 30 02 00 0f 84 c5 00 00 00 e8 b0 02 1d 00 fb 41 f6 c6 18 <74> 05 e8 14 b2 c6 09 41 f7 c6 00 10 00 00 74 08 48 89 df e8 13 16
RSP: 0018:ffffc9000359fed0 EFLAGS: 00000246
RAX: 7eb18dcc31983200 RBX: ffffc9000359ff58 RCX: 7eb18dcc31983200
RDX: 0000000000000000 RSI: ffffffff8d9792eb RDI: ffffffff8be30a00
RBP: ffffc9000359ff48 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: 0000000000000000
R13: 000000000000000f R14: 0000000000000004 R15: ffff88801e879cc0
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3faaa4d9b0
Code: 44 24 20 0f 29 44 24 30 0f 29 44 24 40 48 8b 44 24 08 ff d0 48 83 c4 50 31 c0 5b 5d 41 5c 41 5d 41 5e c3 0f 1f 80 00 00 00 00 <c3> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 c3 66 66 2e 0f 1f
RSP: 002b:00007fff2f532bb8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 00000000000008f8 RCX: 00007f3faabc14a5
RDX: 00007fff2f532bc0 RSI: 00007fff2f532cf0 RDI: 0000000000000011
RBP: 00007fff2f5330dc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000001388
R13: 00000000000927c0 R14: 000000000003255e R15: 00007fff2f533130
 </TASK>

Allocated by task 11918:
 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 5873:
 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 ffff888047001200
 which belongs to the cache xfrm_state of size 928
The buggy address is located 48 bytes inside of
 freed 928-byte region [ffff888047001200, ffff8880470015a0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888047002880 pfn:0x47000
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 ffff888104eec280 dead000000000122 0000000000000000
raw: ffff888047002880 00000000800e0009 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff888104eec280 dead000000000122 0000000000000000
head: ffff888047002880 00000000800e0009 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea00011c0001 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 6516, tgid 6514 (syz.2.200), ts 67953327081, free_ts 67912896361
 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
 xfrm_state_find+0x37d4/0x5400
 xfrm_resolve_and_create_bundle+0x768/0x2f80
 xfrm_lookup_with_ifid+0x2a7/0x1a70
 xfrm_lookup_route+0x3c/0x1c0
 __ip4_datagram_connect+0x9a5/0x1270
 __ip6_datagram_connect+0x9f0/0x1150
 ip6_datagram_connect_v6_only+0x63/0xa0
 __sys_connect+0x316/0x440
page last free pid 5830 tgid 5830 stack trace:
 __free_frozen_pages+0xc71/0xe70
 __put_partials+0x161/0x1c0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2f7/0x400
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 getname_flags+0xb8/0x540
 __x64_sys_symlink+0x5d/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888047001100: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888047001180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888047001200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888047001280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888047001300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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