[   30.814771] ==================================================================
[   30.814950] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70
[   30.816666] Read of size 4 at addr fff00000c9a4d680 by task swapper/1/0
[   30.817430] 
[   30.817482] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G    B            N  6.16.0-rc5-next-20250711 #1 PREEMPT 
[   30.818672] Tainted: [B]=BAD_PAGE, [N]=TEST
[   30.818705] Hardware name: linux,dummy-virt (DT)
[   30.818742] Call trace:
[   30.819006]  show_stack+0x20/0x38 (C)
[   30.819897]  dump_stack_lvl+0x8c/0xd0
[   30.820655]  print_report+0x118/0x5d0
[   30.820759]  kasan_report+0xdc/0x128
[   30.820832]  __asan_report_load4_noabort+0x20/0x30
[   30.821422]  rcu_uaf_reclaim+0x64/0x70
[   30.821551]  rcu_core+0x9f4/0x1e20
[   30.821916]  rcu_core_si+0x18/0x30
[   30.822920]  handle_softirqs+0x374/0xb28
[   30.823121]  __do_softirq+0x1c/0x28
[   30.823247]  ____do_softirq+0x18/0x30
[   30.823292]  call_on_irq_stack+0x24/0x30
[   30.824177]  do_softirq_own_stack+0x24/0x38
[   30.824254]  __irq_exit_rcu+0x1fc/0x318
[   30.824301]  irq_exit_rcu+0x1c/0x80
[   30.825235]  el1_interrupt+0x38/0x58
[   30.825854]  el1h_64_irq_handler+0x18/0x28
[   30.825975]  el1h_64_irq+0x6c/0x70
[   30.826706]  arch_local_irq_enable+0x4/0x8 (P)
[   30.827761]  do_idle+0x384/0x4e8
[   30.828060]  cpu_startup_entry+0x64/0x80
[   30.828636]  secondary_start_kernel+0x28c/0x340
[   30.829203]  __secondary_switched+0xc0/0xc8
[   30.829652] 
[   30.830048] Allocated by task 229:
[   30.830568]  kasan_save_stack+0x3c/0x68
[   30.830891]  kasan_save_track+0x20/0x40
[   30.831217]  kasan_save_alloc_info+0x40/0x58
[   30.831567]  __kasan_kmalloc+0xd4/0xd8
[   30.831887]  __kmalloc_cache_noprof+0x16c/0x3c0
[   30.832241]  rcu_uaf+0xb0/0x2d8
[   30.832388]  kunit_try_run_case+0x170/0x3f0
[   30.832452]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.832495]  kthread+0x328/0x630
[   30.832530]  ret_from_fork+0x10/0x20
[   30.832567] 
[   30.832587] Freed by task 0:
[   30.832613]  kasan_save_stack+0x3c/0x68
[   30.832653]  kasan_save_track+0x20/0x40
[   30.832690]  kasan_save_free_info+0x4c/0x78
[   30.832728]  __kasan_slab_free+0x6c/0x98
[   30.832767]  kfree+0x214/0x3c8
[   30.832804]  rcu_uaf_reclaim+0x28/0x70
[   30.832840]  rcu_core+0x9f4/0x1e20
[   30.832875]  rcu_core_si+0x18/0x30
[   30.832911]  handle_softirqs+0x374/0xb28
[   30.832948]  __do_softirq+0x1c/0x28
[   30.832983] 
[   30.833018] Last potentially related work creation:
[   30.833053]  kasan_save_stack+0x3c/0x68
[   30.833094]  kasan_record_aux_stack+0xb4/0xc8
[   30.833131]  __call_rcu_common.constprop.0+0x74/0x8c8
[   30.833173]  call_rcu+0x18/0x30
[   30.833206]  rcu_uaf+0x14c/0x2d8
[   30.833241]  kunit_try_run_case+0x170/0x3f0
[   30.833281]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.833331]  kthread+0x328/0x630
[   30.833366]  ret_from_fork+0x10/0x20
[   30.833406] 
[   30.833433] The buggy address belongs to the object at fff00000c9a4d680
[   30.833433]  which belongs to the cache kmalloc-32 of size 32
[   30.833494] The buggy address is located 0 bytes inside of
[   30.833494]  freed 32-byte region [fff00000c9a4d680, fff00000c9a4d6a0)
[   30.833555] 
[   30.833577] The buggy address belongs to the physical page:
[   30.833623] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a4d
[   30.833715] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   30.833819] page_type: f5(slab)
[   30.833898] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000
[   30.833997] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   30.834086] page dumped because: kasan: bad access detected
[   30.834130] 
[   30.834148] Memory state around the buggy address:
[   30.834181]  fff00000c9a4d580: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc
[   30.834224]  fff00000c9a4d600: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   30.834273] >fff00000c9a4d680: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
[   30.834311]                    ^
[   30.834472]  fff00000c9a4d700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.834612]  fff00000c9a4d780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.834712] ==================================================================

[   24.323430] ==================================================================
[   24.323868] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60
[   24.324099] Read of size 4 at addr ffff8881057449c0 by task swapper/1/0
[   24.324326] 
[   24.324419] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G    B            N  6.16.0-rc5-next-20250711 #1 PREEMPT(voluntary) 
[   24.324537] Tainted: [B]=BAD_PAGE, [N]=TEST
[   24.324550] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   24.324785] Call Trace:
[   24.324823]  <IRQ>
[   24.324852]  dump_stack_lvl+0x73/0xb0
[   24.324890]  print_report+0xd1/0x610
[   24.324913]  ? __virt_addr_valid+0x1db/0x2d0
[   24.324938]  ? rcu_uaf_reclaim+0x50/0x60
[   24.324959]  ? kasan_complete_mode_report_info+0x64/0x200
[   24.324988]  ? rcu_uaf_reclaim+0x50/0x60
[   24.325009]  kasan_report+0x141/0x180
[   24.325031]  ? rcu_uaf_reclaim+0x50/0x60
[   24.325055]  __asan_report_load4_noabort+0x18/0x20
[   24.325078]  rcu_uaf_reclaim+0x50/0x60
[   24.325098]  rcu_core+0x66f/0x1c40
[   24.325128]  ? __pfx_rcu_core+0x10/0x10
[   24.325150]  ? ktime_get+0x6b/0x150
[   24.325173]  ? handle_softirqs+0x18e/0x730
[   24.325199]  rcu_core_si+0x12/0x20
[   24.325219]  handle_softirqs+0x209/0x730
[   24.325239]  ? hrtimer_interrupt+0x2fe/0x780
[   24.325262]  ? __pfx_handle_softirqs+0x10/0x10
[   24.325287]  __irq_exit_rcu+0xc9/0x110
[   24.325307]  irq_exit_rcu+0x12/0x20
[   24.325327]  sysvec_apic_timer_interrupt+0x81/0x90
[   24.325352]  </IRQ>
[   24.325378]  <TASK>
[   24.325390]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   24.325537] RIP: 0010:pv_native_safe_halt+0xf/0x20
[   24.325761] Code: 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d c3 ff 17 00 fb f4 <e9> 7c 1d 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
[   24.325847] RSP: 0000:ffff88810087fdc8 EFLAGS: 00010216
[   24.325936] RAX: ffff88819d91d000 RBX: ffff88810085b000 RCX: ffffffffbb30ba25
[   24.325982] RDX: ffffed102b626193 RSI: 0000000000000004 RDI: 000000000001ba3c
[   24.326031] RBP: ffff88810087fdd0 R08: 0000000000000001 R09: ffffed102b626192
[   24.326073] R10: ffff88815b130c93 R11: 000000000001bc00 R12: 0000000000000001
[   24.326115] R13: ffffed102010b600 R14: ffffffffbcff4ad0 R15: 0000000000000000
[   24.326172]  ? ct_kernel_exit.constprop.0+0xa5/0xd0
[   24.326225]  ? default_idle+0xd/0x20
[   24.326247]  arch_cpu_idle+0xd/0x20
[   24.326270]  default_idle_call+0x48/0x80
[   24.326289]  do_idle+0x379/0x4f0
[   24.326315]  ? __pfx_do_idle+0x10/0x10
[   24.326338]  ? _raw_spin_unlock_irqrestore+0x49/0x90
[   24.326363]  ? complete+0x15b/0x1d0
[   24.326388]  cpu_startup_entry+0x5c/0x70
[   24.326438]  start_secondary+0x211/0x290
[   24.326461]  ? __pfx_start_secondary+0x10/0x10
[   24.326486]  common_startup_64+0x13e/0x148
[   24.326518]  </TASK>
[   24.326530] 
[   24.343437] Allocated by task 248:
[   24.343816]  kasan_save_stack+0x45/0x70
[   24.344210]  kasan_save_track+0x18/0x40
[   24.344464]  kasan_save_alloc_info+0x3b/0x50
[   24.344605]  __kasan_kmalloc+0xb7/0xc0
[   24.344725]  __kmalloc_cache_noprof+0x189/0x420
[   24.344881]  rcu_uaf+0xb0/0x330
[   24.344990]  kunit_try_run_case+0x1a5/0x480
[   24.345125]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.345289]  kthread+0x337/0x6f0
[   24.345402]  ret_from_fork+0x116/0x1d0
[   24.345585]  ret_from_fork_asm+0x1a/0x30
[   24.345747] 
[   24.345811] Freed by task 0:
[   24.345907]  kasan_save_stack+0x45/0x70
[   24.346073]  kasan_save_track+0x18/0x40
[   24.346260]  kasan_save_free_info+0x3f/0x60
[   24.346452]  __kasan_slab_free+0x56/0x70
[   24.346686]  kfree+0x222/0x3f0
[   24.346859]  rcu_uaf_reclaim+0x1f/0x60
[   24.347008]  rcu_core+0x66f/0x1c40
[   24.347150]  rcu_core_si+0x12/0x20
[   24.347278]  handle_softirqs+0x209/0x730
[   24.347610]  __irq_exit_rcu+0xc9/0x110
[   24.347806]  irq_exit_rcu+0x12/0x20
[   24.348040]  sysvec_apic_timer_interrupt+0x81/0x90
[   24.348314]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   24.348723] 
[   24.348954] Last potentially related work creation:
[   24.349696]  kasan_save_stack+0x45/0x70
[   24.349870]  kasan_record_aux_stack+0xb2/0xc0
[   24.350126]  __call_rcu_common.constprop.0+0x7b/0x9e0
[   24.350366]  call_rcu+0x12/0x20
[   24.350589]  rcu_uaf+0x168/0x330
[   24.351039]  kunit_try_run_case+0x1a5/0x480
[   24.351256]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.351598]  kthread+0x337/0x6f0
[   24.351894]  ret_from_fork+0x116/0x1d0
[   24.352085]  ret_from_fork_asm+0x1a/0x30
[   24.352499] 
[   24.352792] The buggy address belongs to the object at ffff8881057449c0
[   24.352792]  which belongs to the cache kmalloc-32 of size 32
[   24.353438] The buggy address is located 0 bytes inside of
[   24.353438]  freed 32-byte region [ffff8881057449c0, ffff8881057449e0)
[   24.353966] 
[   24.354192] The buggy address belongs to the physical page:
[   24.354636] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105744
[   24.354990] flags: 0x200000000000000(node=0|zone=2)
[   24.355325] page_type: f5(slab)
[   24.355651] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   24.356092] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   24.356534] page dumped because: kasan: bad access detected
[   24.356868] 
[   24.356967] Memory state around the buggy address:
[   24.357272]  ffff888105744880: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   24.357786]  ffff888105744900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   24.358214] >ffff888105744980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   24.358651]                                            ^
[   24.358865]  ffff888105744a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.359304]  ffff888105744a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.359761] ==================================================================