[   30.959127] ==================================================================
[   30.959245] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70
[   30.959309] Read of size 4 at addr fff00000c6500bc0 by task swapper/0/0
[   30.959355] 
[   30.959392] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G    B            N  6.16.0-rc6-next-20250715 #1 PREEMPT 
[   30.961994] Tainted: [B]=BAD_PAGE, [N]=TEST
[   30.962403] Hardware name: linux,dummy-virt (DT)
[   30.963042] Call trace:
[   30.963585]  show_stack+0x20/0x38 (C)
[   30.964043]  dump_stack_lvl+0x8c/0xd0
[   30.964480]  print_report+0x118/0x5d0
[   30.964536]  kasan_report+0xdc/0x128
[   30.965043]  __asan_report_load4_noabort+0x20/0x30
[   30.965541]  rcu_uaf_reclaim+0x64/0x70
[   30.966063]  rcu_core+0x9f4/0x1e20
[   30.966117]  rcu_core_si+0x18/0x30
[   30.966834]  handle_softirqs+0x374/0xb28
[   30.968148]  __do_softirq+0x1c/0x28
[   30.968212]  ____do_softirq+0x18/0x30
[   30.968260]  call_on_irq_stack+0x24/0x30
[   30.968307]  do_softirq_own_stack+0x24/0x38
[   30.968355]  __irq_exit_rcu+0x1fc/0x318
[   30.968401]  irq_exit_rcu+0x1c/0x80
[   30.968822]  el1_interrupt+0x38/0x58
[   30.968884]  el1h_64_irq_handler+0x18/0x28
[   30.968943]  el1h_64_irq+0x6c/0x70
[   30.969051]  finish_task_switch.isra.0+0x120/0x5e8 (P)
[   30.969108]  __schedule+0xab4/0x2840
[   30.969156]  schedule_idle+0x60/0xa8
[   30.969200]  do_idle+0x2c4/0x4e8
[   30.969248]  cpu_startup_entry+0x64/0x80
[   30.969295]  rest_init+0x160/0x188
[   30.969339]  start_kernel+0x30c/0x3d0
[   30.969391]  __primary_switched+0x8c/0xa0
[   30.969455] 
[   30.970675] Allocated by task 230:
[   30.970715]  kasan_save_stack+0x3c/0x68
[   30.970766]  kasan_save_track+0x20/0x40
[   30.970806]  kasan_save_alloc_info+0x40/0x58
[   30.970845]  __kasan_kmalloc+0xd4/0xd8
[   30.970883]  __kmalloc_cache_noprof+0x16c/0x3c0
[   30.970925]  rcu_uaf+0xb0/0x2d8
[   30.971234]  kunit_try_run_case+0x170/0x3f0
[   30.971285]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.971331]  kthread+0x328/0x630
[   30.971839]  ret_from_fork+0x10/0x20
[   30.971952] 
[   30.971972] Freed by task 0:
[   30.972154]  kasan_save_stack+0x3c/0x68
[   30.972201]  kasan_save_track+0x20/0x40
[   30.972239]  kasan_save_free_info+0x4c/0x78
[   30.972277]  __kasan_slab_free+0x6c/0x98
[   30.972935]  kfree+0x214/0x3c8
[   30.973837]  rcu_uaf_reclaim+0x28/0x70
[   30.973884]  rcu_core+0x9f4/0x1e20
[   30.973920]  rcu_core_si+0x18/0x30
[   30.973955]  handle_softirqs+0x374/0xb28
[   30.973993]  __do_softirq+0x1c/0x28
[   30.974029] 
[   30.974065] Last potentially related work creation:
[   30.974486]  kasan_save_stack+0x3c/0x68
[   30.974536]  kasan_record_aux_stack+0xb4/0xc8
[   30.974576]  __call_rcu_common.constprop.0+0x74/0x8c8
[   30.974620]  call_rcu+0x18/0x30
[   30.974654]  rcu_uaf+0x14c/0x2d8
[   30.974691]  kunit_try_run_case+0x170/0x3f0
[   30.974729]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.974772]  kthread+0x328/0x630
[   30.974805]  ret_from_fork+0x10/0x20
[   30.974848] 
[   30.974875] The buggy address belongs to the object at fff00000c6500bc0
[   30.974875]  which belongs to the cache kmalloc-32 of size 32
[   30.974935] The buggy address is located 0 bytes inside of
[   30.974935]  freed 32-byte region [fff00000c6500bc0, fff00000c6500be0)
[   30.974994] 
[   30.975014] The buggy address belongs to the physical page:
[   30.975047] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106500
[   30.975100] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   30.975160] page_type: f5(slab)
[   30.975206] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000
[   30.975256] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   30.975297] page dumped because: kasan: bad access detected
[   30.975327] 
[   30.975344] Memory state around the buggy address:
[   30.975378]  fff00000c6500a80: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc
[   30.975420]  fff00000c6500b00: fa fb fb fb fc fc fc fc 00 00 05 fc fc fc fc fc
[   30.975491] >fff00000c6500b80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   30.975530]                                            ^
[   30.975564]  fff00000c6500c00: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.975605]  fff00000c6500c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.975644] ==================================================================

[   24.597731] ==================================================================
[   24.599102] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60
[   24.599327] Read of size 4 at addr ffff8881055e0b40 by task swapper/1/0
[   24.599534] 
[   24.599645] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G    B            N  6.16.0-rc6-next-20250715 #1 PREEMPT(voluntary) 
[   24.599693] Tainted: [B]=BAD_PAGE, [N]=TEST
[   24.599705] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   24.599726] Call Trace:
[   24.599755]  <IRQ>
[   24.599772]  dump_stack_lvl+0x73/0xb0
[   24.599802]  print_report+0xd1/0x610
[   24.599824]  ? __virt_addr_valid+0x1db/0x2d0
[   24.599846]  ? rcu_uaf_reclaim+0x50/0x60
[   24.599866]  ? kasan_complete_mode_report_info+0x64/0x200
[   24.599891]  ? rcu_uaf_reclaim+0x50/0x60
[   24.599911]  kasan_report+0x141/0x180
[   24.599932]  ? rcu_uaf_reclaim+0x50/0x60
[   24.599956]  __asan_report_load4_noabort+0x18/0x20
[   24.599980]  rcu_uaf_reclaim+0x50/0x60
[   24.600000]  rcu_core+0x66f/0x1c40
[   24.600029]  ? __pfx_rcu_core+0x10/0x10
[   24.600050]  ? ktime_get+0x6b/0x150
[   24.600072]  ? handle_softirqs+0x18e/0x730
[   24.600096]  rcu_core_si+0x12/0x20
[   24.600116]  handle_softirqs+0x209/0x730
[   24.600135]  ? hrtimer_interrupt+0x2fe/0x780
[   24.600162]  ? __pfx_handle_softirqs+0x10/0x10
[   24.600188]  __irq_exit_rcu+0xc9/0x110
[   24.600208]  irq_exit_rcu+0x12/0x20
[   24.600227]  sysvec_apic_timer_interrupt+0x81/0x90
[   24.600251]  </IRQ>
[   24.600276]  <TASK>
[   24.600287]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   24.600380] RIP: 0010:pv_native_safe_halt+0xf/0x20
[   24.601279] 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 e3 22 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
[   24.601957] RSP: 0000:ffff88810087fdc8 EFLAGS: 00010216
[   24.602473] RAX: ffff88819d115000 RBX: ffff88810085b000 RCX: ffffffffbbb19a25
[   24.602549] RDX: ffffed102b626193 RSI: 0000000000000004 RDI: 000000000001c67c
[   24.602690] RBP: ffff88810087fdd0 R08: 0000000000000001 R09: ffffed102b626192
[   24.602737] R10: ffff88815b130c93 R11: ffff88815b1363c8 R12: 0000000000000001
[   24.602781] R13: ffffed102010b600 R14: ffffffffbd7f91d0 R15: 0000000000000000
[   24.602843]  ? ct_kernel_exit.constprop.0+0xa5/0xd0
[   24.602902]  ? default_idle+0xd/0x20
[   24.602926]  arch_cpu_idle+0xd/0x20
[   24.602948]  default_idle_call+0x48/0x80
[   24.602969]  do_idle+0x379/0x4f0
[   24.602996]  ? __pfx_do_idle+0x10/0x10
[   24.603017]  ? _raw_spin_unlock_irqrestore+0x49/0x90
[   24.603040]  ? complete+0x15b/0x1d0
[   24.603066]  cpu_startup_entry+0x5c/0x70
[   24.603089]  start_secondary+0x211/0x290
[   24.603111]  ? __pfx_start_secondary+0x10/0x10
[   24.603137]  common_startup_64+0x13e/0x148
[   24.603170]  </TASK>
[   24.603181] 
[   24.616785] Allocated by task 246:
[   24.616933]  kasan_save_stack+0x45/0x70
[   24.617116]  kasan_save_track+0x18/0x40
[   24.617245]  kasan_save_alloc_info+0x3b/0x50
[   24.617388]  __kasan_kmalloc+0xb7/0xc0
[   24.617512]  __kmalloc_cache_noprof+0x189/0x420
[   24.617813]  rcu_uaf+0xb0/0x330
[   24.617983]  kunit_try_run_case+0x1a5/0x480
[   24.618196]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.618442]  kthread+0x337/0x6f0
[   24.618711]  ret_from_fork+0x116/0x1d0
[   24.618900]  ret_from_fork_asm+0x1a/0x30
[   24.619057] 
[   24.619120] Freed by task 0:
[   24.619219]  kasan_save_stack+0x45/0x70
[   24.619347]  kasan_save_track+0x18/0x40
[   24.619514]  kasan_save_free_info+0x3f/0x60
[   24.619800]  __kasan_slab_free+0x56/0x70
[   24.619992]  kfree+0x222/0x3f0
[   24.620144]  rcu_uaf_reclaim+0x1f/0x60
[   24.620267]  rcu_core+0x66f/0x1c40
[   24.620387]  rcu_core_si+0x12/0x20
[   24.620503]  handle_softirqs+0x209/0x730
[   24.620887]  __irq_exit_rcu+0xc9/0x110
[   24.621095]  irq_exit_rcu+0x12/0x20
[   24.621277]  sysvec_apic_timer_interrupt+0x81/0x90
[   24.621505]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   24.621836] 
[   24.621954] Last potentially related work creation:
[   24.622191]  kasan_save_stack+0x45/0x70
[   24.622333]  kasan_record_aux_stack+0xb2/0xc0
[   24.622484]  __call_rcu_common.constprop.0+0x7b/0x9e0
[   24.622792]  call_rcu+0x12/0x20
[   24.622967]  rcu_uaf+0x168/0x330
[   24.623128]  kunit_try_run_case+0x1a5/0x480
[   24.623321]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.623535]  kthread+0x337/0x6f0
[   24.623770]  ret_from_fork+0x116/0x1d0
[   24.623921]  ret_from_fork_asm+0x1a/0x30
[   24.624120] 
[   24.624220] The buggy address belongs to the object at ffff8881055e0b40
[   24.624220]  which belongs to the cache kmalloc-32 of size 32
[   24.624769] The buggy address is located 0 bytes inside of
[   24.624769]  freed 32-byte region [ffff8881055e0b40, ffff8881055e0b60)
[   24.625110] 
[   24.625176] The buggy address belongs to the physical page:
[   24.625380] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1055e0
[   24.625923] flags: 0x200000000000000(node=0|zone=2)
[   24.626163] page_type: f5(slab)
[   24.626325] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   24.626740] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   24.627054] page dumped because: kasan: bad access detected
[   24.627250] 
[   24.627311] Memory state around the buggy address:
[   24.627459]  ffff8881055e0a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   24.627854]  ffff8881055e0a80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   24.628169] >ffff8881055e0b00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   24.628476]                                            ^
[   24.628785]  ffff8881055e0b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.629055]  ffff8881055e0c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.629330] ==================================================================