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BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x696/0xca0
Write of size 8 at addr ffff888112b316b0 by task syz-executor/14193

CPU: 1 UID: 0 PID: 14193 Comm: syz-executor Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895-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:arch_stack_walk+0x125/0x150
Code: 00 48 85 c0 74 24 48 89 df 48 89 c6 4d 89 f3 2e e8 f0 d7 11 0a 84 c0 74 11 4c 89 ff e8 d4 27 09 00 83 bd 78 ff ff ff 00 75 cf <65> 48 8b 05 f3 26 36 11 48 3b 45 d8 75 12 48 83 c4 68 5b 41 5c 41
RSP: 0018:ffffc9000655e2e8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000655e3a0 RCX: 10c1d9e31c09a800
RDX: 0000000000000000 RSI: ffffffff8dba33cb RDI: ffff88811c643980
RBP: ffffc9000655e370 R08: 0000000000000000 R09: ffffffff81cea1f6
R10: ffffc9000655e338 R11: ffffffff81ac3890 R12: ffff88811c643980
R13: ffff88801a441500 R14: ffffffff81ac3890 R15: ffffc9000655e2e8
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_node_track_caller_noprof+0x271/0x4e0
 kstrdup+0x42/0x100
 __kernfs_new_node+0x9c/0x7e0
 kernfs_new_node+0x102/0x210
 kernfs_create_dir_ns+0x44/0x130
 sysfs_create_dir_ns+0x123/0x280
 kobject_add_internal+0x59f/0xb40
 kobject_init_and_add+0x125/0x190
 netdev_queue_update_kobjects+0x249/0x6c0
 netdev_register_kobject+0x258/0x310
 register_netdevice+0x126c/0x1ae0
 veth_newlink+0x5cc/0xa50
 rtnl_newlink_create+0x310/0xb00
 rtnl_newlink+0x16d6/0x1c70
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 __sys_sendto+0x3bd/0x520
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8cceb90a7c
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007ffd33694e80 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f8ccf8e4620 RCX: 00007f8cceb90a7c
RDX: 000000000000006c RSI: 00007f8ccf8e4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd33694ed4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f8ccf8e4670 R15: 0000000000000000
 </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 5945:
 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 ffff888112b31680
 which belongs to the cache xfrm_state of size 928
The buggy address is located 48 bytes inside of
 freed 928-byte region [ffff888112b31680, ffff888112b31a20)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888112b31f80 pfn:0x112b30
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 ffff8881054d4b40 dead000000000122 0000000000000000
raw: ffff888112b31f80 00000000800e0009 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff8881054d4b40 dead000000000122 0000000000000000
head: ffff888112b31f80 00000000800e0009 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea00044acc01 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 6216, tgid 6215 (syz.1.116), ts 68120061145, free_ts 68115496504
 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 6215 tgid 6215 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __slab_free+0x303/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 ptlock_alloc+0x20/0x70
 pte_alloc_one+0x7d/0x170
 __handle_mm_fault+0x2795/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30

Memory state around the buggy address:
 ffff888112b31580: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888112b31600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888112b31680: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888112b31700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888112b31780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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