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BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x696/0xca0
Write of size 8 at addr ffff888120bc0030 by task syz.1.894/7936

CPU: 1 UID: 0 PID: 7936 Comm: syz.1.894 Not tainted 6.17.0-rc1-syzkaller-00022-g07866544e410-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:jhash+0x104/0x750
Code: 8d 3c 2e 48 83 c7 0b 48 89 f8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 2a 01 00 00 43 03 5c 2e 08 41 29 dc 89 d8 c1 c0 04 44 31 e0 <01> eb 89 c1 c1 c1 06 29 c5 31 e9 01 d8 29 cb 89 ca c1 c2 08 31 da
RSP: 0018:ffffc900066e7ab8 EFLAGS: 00000286
RAX: 00000000d09730f6 RBX: 000000009dea7e58 RCX: 0000000000080000
RDX: dffffc0000000000 RSI: 000000000007ffff RDI: ffff888125a51173
RBP: 000000007976dd4e R08: 0000000000000000 R09: ffffffff81cff6cd
R10: 000000000000001e R11: ffffffff81e04a70 R12: 000000000e30d57f
R13: 0000000000051168 R14: ffff888125a00000 R15: 00000000000aee93
 htab_map_update_elem+0x117/0x830
 bpf_map_update_value+0x501/0x590
 generic_map_update_batch+0x5b5/0x7f0
 bpf_map_do_batch+0x36c/0x5f0
 __sys_bpf+0x6af/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa87eb8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa87fa0a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fa87edb5fa0 RCX: 00007fa87eb8ebe9
RDX: 0000000000000038 RSI: 0000200000000200 RDI: 000000000000001a
RBP: 00007fa87ec11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa87edb6038 R14: 00007fa87edb5fa0 R15: 00007ffe608e0748
 </TASK>

Allocated by task 6981:
 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 5854:
 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 ffff888120bc0000
 which belongs to the cache xfrm_state of size 928
The buggy address is located 48 bytes inside of
 freed 928-byte region [ffff888120bc0000, ffff888120bc03a0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888120bc0900 pfn:0x120bc0
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 ffff888104fad280 dead000000000122 0000000000000000
raw: ffff888120bc0900 00000000800e000d 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff888104fad280 dead000000000122 0000000000000000
head: ffff888120bc0900 00000000800e000d 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea000482f001 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 6981, tgid 6980 (syz.1.466), ts 107314506042, free_ts 107264561816
 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 31 tgid 31 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 stack_depot_save_flags+0x436/0x860
 ref_tracker_free+0xfe/0x7d0
 dst_destroy+0x10f/0x350
 rcu_core+0xcab/0x1770
 handle_softirqs+0x286/0x870
 do_softirq+0xec/0x180
 __local_bh_enable_ip+0x17d/0x1c0
 rcu_tasks_invoke_cbs+0x430/0x720
 rcu_tasks_one_gp+0xd19/0xdf0
 rcu_tasks_kthread+0x195/0x1c0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30

Memory state around the buggy address:
 ffff888120bbff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888120bbff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888120bc0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888120bc0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888120bc0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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