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BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x696/0xca0
Write of size 8 at addr ffff888109ba4030 by task syz.1.1036/8240

CPU: 1 UID: 0 PID: 8240 Comm: syz.1.1036 Not tainted 6.16.0-syzkaller-12063-g37816488247d #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 5b 18 16 f6 e8 96 72 4d 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: 0018:ffffc90002bfee00 EFLAGS: 00000286
RAX: 6fcbc5595920fe00 RBX: 0000000000000000 RCX: 6fcbc5595920fe00
RDX: 0000000000000007 RSI: ffffffff8d9b4943 RDI: 0000000000000001
RBP: ffffc90002bfeea0 R08: ffffffff8fa34737 R09: 1ffffffff1f468e6
R10: dffffc0000000000 R11: fffffbfff1f468e7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200057fdc0
 irqentry_exit+0x6f/0x90
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:kasan_check_range+0x6f/0x2c0
Code: 1e fa 4c 39 cf 0f 82 58 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 49 c1 e9 03 <48> bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83
RSP: 0018:ffffc90002bfef68 EFLAGS: 00000a03
RAX: ffffffff81faf901 RBX: 0100000000000000 RCX: ffffffff81faf9af
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00045b72f4
RBP: ffffc90002bff090 R08: ffffea00045b72f7 R09: 1ffffd40008b6e5e
R10: dffffc0000000000 R11: fffff940008b6e5e R12: 0000000000000001
R13: ffffea00045b72c0 R14: 0000000000000013 R15: 1ffffd40008b6e5e
 folios_put_refs+0x22f/0x640
 free_pages_and_swap_cache+0x277/0x520
 tlb_flush_mmu+0x3a0/0x680
 unmap_page_range+0x3b31/0x4370
 unmap_vmas+0x399/0x580
 exit_mmap+0x248/0xb50
 __mmput+0x118/0x430
 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: 0033:0x7fda8f78ebe9
Code: Unable to access opcode bytes at 0x7fda8f78ebbf.
RSP: 002b:00007fda906010e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fda8f9b5fa8 RCX: 00007fda8f78ebe9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fda8f9b5fac
RBP: 00007fda8f9b5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 000000000000001c R11: 0000000000000246 R12: 0000000000000000
R13: 00007fda8f9b6038 R14: 00007ffc76023130 R15: 00007ffc76023218
 </TASK>

Allocated by task 5981:
 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 96:
 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 ffff888109ba4000
 which belongs to the cache xfrm_state of size 928
The buggy address is located 48 bytes inside of
 freed 928-byte region [ffff888109ba4000, ffff888109ba43a0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888109ba4900 pfn:0x109ba4
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 ffff888104a7e3c0 dead000000000122 0000000000000000
raw: ffff888109ba4900 00000000800e000d 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff888104a7e3c0 dead000000000122 0000000000000000
head: ffff888109ba4900 00000000800e000d 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea000426e901 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 5981, tgid 5979 (syz.2.35), ts 66821901919, free_ts 66804916948
 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
 __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 5981 tgid 5979 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
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 rtmsg_fib+0xea/0x4c0
 fib_table_delete+0xca9/0xf80
 fib_magic+0x2e4/0x390
 fib_del_ifaddr+0x1082/0x1480
 fib_inetaddr_event+0xbb/0x190
 notifier_call_chain+0x1b6/0x3e0
 blocking_notifier_call_chain+0x6a/0x90
 __inet_del_ifa+0x87d/0x1040
 devinet_ioctl+0xb27/0x1b50

Memory state around the buggy address:
 ffff888109ba3f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888109ba3f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888109ba4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888109ba4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888109ba4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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