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BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x696/0xca0
Write of size 8 at addr ffff88802f318930 by task modprobe/10607

CPU: 0 UID: 0 PID: 10607 Comm: modprobe Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #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:page_table_check_set+0x2f6/0x730
Code: be 04 00 00 00 e8 3a ca f4 ff 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 55 01 00 00 44 8b 3b <31> ff 44 89 fe e8 40 61 91 ff 45 85 ff 0f 85 5e 02 00 00 48 8d 7b
RSP: 0000:ffffc90007307958 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888102a03e58 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888102a03e58
RBP: ffff888102a03e10 R08: ffff888102a03e5b R09: 1ffff110205407cb
R10: dffffc0000000000 R11: ffffed10205407cc R12: 0000000000000001
R13: 0000000000000000 R14: 000000000013672d R15: 0000000000000000
 set_pte_range+0x6a5/0x700
 filemap_map_pages+0xf32/0x1740
 __handle_mm_fault+0x34ac/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7fd47a6fc4d3
Code: Unable to access opcode bytes at 0x7fd47a6fc4a9.
RSP: 002b:00007ffd24f83128 EFLAGS: 00010202
RAX: 0000000000000015 RBX: 00007fd47a818400 RCX: 0000000000000000
RDX: 000000000000000d RSI: 00007fd47a812261 RDI: 00007fd47a6783c0
RBP: 00007ffd24f83230 R08: 00007ffd24f830a8 R09: 00007fd47a8ce500
R10: 00007fd47a80d778 R11: 0000000000000007 R12: 00007fd47a8ce000
R13: 00007fd47a6fc4d3 R14: 00007fd47a8cc6b0 R15: 00007fd47a8cfb70
 </TASK>

Allocated by task 7116:
 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 792:
 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 ffff88802f318900
 which belongs to the cache xfrm_state of size 928
The buggy address is located 48 bytes inside of
 freed 928-byte region [ffff88802f318900, ffff88802f318ca0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802f318900 pfn:0x2f318
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 ffff8881049f6a00 dead000000000122 0000000000000000
raw: ffff88802f318900 00000000800e0005 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff8881049f6a00 dead000000000122 0000000000000000
head: ffff88802f318900 00000000800e0005 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000bcc601 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 6120, tgid 6119 (syz.1.57), ts 54201176226, free_ts 54122187791
 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 5591 tgid 5591 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 free_large_kmalloc+0x13a/0x1f0
 skb_release_data+0x62d/0x7c0
 consume_skb+0x9e/0xf0
 __unix_dgram_recvmsg+0x9f9/0xd60
 sock_recvmsg+0x22c/0x270
 sock_read_iter+0x231/0x2f0
 do_iter_readv_writev+0x56e/0x7f0
 vfs_readv+0x253/0x850
 do_readv+0x14d/0x2d0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88802f318800: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802f318880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802f318900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88802f318980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802f318a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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