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BUG: KASAN: use-after-free in __lock_acquire+0x42c9/0x5e80
Read of size 8 at addr ffff88800e724738 by task syz-executor/11846

CPU: 1 PID: 11846 Comm: syz-executor Not tainted 6.1.0-rc2-next-20221028 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x8b/0xc3
 print_report+0x175/0x478
 kasan_report+0xbb/0x1d0
 __lock_acquire+0x42c9/0x5e80
 lock_acquire+0x1a2/0x540
 _raw_spin_lock_irq+0x32/0x60
 kmemleak_scan+0x1a0/0x1610
 kmemleak_write+0x570/0x690
 full_proxy_write+0x11d/0x1a0
 vfs_write+0x2cb/0xda0
 ksys_write+0x127/0x260
 do_syscall_64+0x3b/0xa0
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f9ccb99e5c3
Code: 16 00 00 00 eb ae 90 b8 6e 00 00 00 eb a6 e8 44 ef 04 00 0f 1f 40 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18
RSP: 002b:00007ffdd0402368 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffdd04029a8 RCX: 00007f9ccb99e5c3
RDX: 0000000000000004 RSI: 00007f9ccba54ed9 RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000332 R09: 00007ffdd0551080
R10: 00007ffdd0551090 R11: 0000000000000246 R12: 00000000fffffff6
R13: 00007ffdd0403ef1 R14: 0000000000000000 R15: 00000000000c7cf7
 </TASK>

Allocated by task 11624:
 kasan_save_stack+0x1e/0x50
 kasan_set_track+0x21/0x40
 __kasan_slab_alloc+0x58/0x80
 kmem_cache_alloc+0x1a9/0x3f0
 __create_object+0x3d/0xc10
 kmem_cache_alloc+0x235/0x3f0
 __kernfs_new_node+0xd4/0x8d0
 kernfs_new_node+0x93/0x130
 __kernfs_create_file+0x51/0x360
 sysfs_add_file_mode_ns+0x218/0x440
 internal_create_group+0x322/0xb30
 internal_create_groups.part.0+0x90/0x150
 sysfs_create_groups+0x25/0x60
 device_add+0x1433/0x1ed0
 netdev_register_kobject+0x17a/0x3c0
 register_netdevice+0xd5c/0x1520
 register_netdev+0x2d/0x60
 loopback_net_init+0x73/0x180
 ops_init+0xbb/0x690
 setup_net+0x40c/0x9e0
 copy_net_ns+0x318/0x770
 create_new_namespaces+0x3f6/0xb40
 copy_namespaces+0x3b3/0x4b0
 copy_process+0x29e4/0x6e70
 kernel_clone+0xe7/0x8a0
 __do_sys_clone3+0x1d5/0x2f0
 do_syscall_64+0x3b/0xa0
 entry_SYSCALL_64_after_hwframe+0x72/0xdc

Freed by task 13:
 kasan_save_stack+0x1e/0x50
 kasan_set_track+0x21/0x40
 kasan_save_free_info+0x2a/0x60
 __kasan_slab_free+0x106/0x1a0
 kmem_cache_free+0xf7/0x620
 rcu_core+0x7e2/0x2090
 __do_softirq+0x1c3/0x8f5

Last potentially related work creation:
 kasan_save_stack+0x1e/0x50
 __kasan_record_aux_stack+0x95/0xc0
 __call_rcu_common.constprop.0+0x6a/0xa50
 kmem_cache_free+0xbd/0x620
 kernfs_put.part.0+0x2c7/0x550
 kernfs_put+0x42/0x60
 kernfs_remove_by_name_ns+0xb8/0x130
 remove_files+0x96/0x1d0
 sysfs_remove_group+0x87/0x180
 sysfs_remove_groups+0x5c/0xb0
 device_remove_attrs+0x192/0x2a0
 device_del+0x4ed/0xfe0
 unregister_netdevice_many+0xc1c/0x1520
 default_device_exit_batch+0x44b/0x5a0
 ops_exit_list+0x12b/0x190
 cleanup_net+0x484/0x9f0
 process_one_work+0xa17/0x16b0
 worker_thread+0x637/0x1270
 kthread+0x2ed/0x3b0
 ret_from_fork+0x2c/0x50

Second to last potentially related work creation:
 kasan_save_stack+0x1e/0x50
 __kasan_record_aux_stack+0x95/0xc0
 __call_rcu_common.constprop.0+0x6a/0xa50
 kmem_cache_free+0xbd/0x620
 rcu_core+0x7e2/0x2090
 __do_softirq+0x1c3/0x8f5

The buggy address belongs to the object at ffff88800e724720
 which belongs to the cache kmemleak_object of size 240
The buggy address is located 24 bytes inside of
 240-byte region [ffff88800e724720, ffff88800e724810)

The buggy address belongs to the physical page:
page:000000002543b563 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe724
anon flags: 0x100000000000200(slab|node=0|zone=1)
raw: 0100000000000200 ffff888007c4f780 ffffea0000787a00 dead000000000005
raw: 0000000000000000 00000000000d000d 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88800e724600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88800e724680: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
>ffff88800e724700: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff88800e724780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88800e724800: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00
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