[   19.370979] ==================================================================
[   19.371127] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70
[   19.371204] Read of size 4 at addr fff00000c3faa740 by task swapper/1/0
[   19.371251] 
[   19.371291] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G    B   W        N  6.15.1-rc1 #1 PREEMPT 
[   19.371393] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST
[   19.371423] Hardware name: linux,dummy-virt (DT)
[   19.371456] Call trace:
[   19.371482]  show_stack+0x20/0x38 (C)
[   19.371533]  dump_stack_lvl+0x8c/0xd0
[   19.371584]  print_report+0x118/0x608
[   19.371629]  kasan_report+0xdc/0x128
[   19.371675]  __asan_report_load4_noabort+0x20/0x30
[   19.371727]  rcu_uaf_reclaim+0x64/0x70
[   19.371773]  rcu_core+0x9f4/0x1e20
[   19.371820]  rcu_core_si+0x18/0x30
[   19.371864]  handle_softirqs+0x374/0xb28
[   19.371911]  __do_softirq+0x1c/0x28
[   19.371956]  ____do_softirq+0x18/0x30
[   19.372000]  call_on_irq_stack+0x24/0x58
[   19.372047]  do_softirq_own_stack+0x24/0x38
[   19.372094]  __irq_exit_rcu+0x1fc/0x318
[   19.372140]  irq_exit_rcu+0x1c/0x80
[   19.372185]  el1_interrupt+0x38/0x58
[   19.372232]  el1h_64_irq_handler+0x18/0x28
[   19.372282]  el1h_64_irq+0x6c/0x70
[   19.374047]  arch_local_irq_enable+0x4/0x8 (P)
[   19.374621]  do_idle+0x384/0x4e8
[   19.374683]  cpu_startup_entry+0x64/0x80
[   19.374734]  secondary_start_kernel+0x288/0x340
[   19.374788]  __secondary_switched+0xc0/0xc8
[   19.374844] 
[   19.374864] Allocated by task 201:
[   19.374896]  kasan_save_stack+0x3c/0x68
[   19.374938]  kasan_save_track+0x20/0x40
[   19.374977]  kasan_save_alloc_info+0x40/0x58
[   19.375023]  __kasan_kmalloc+0xd4/0xd8
[   19.375061]  __kmalloc_cache_noprof+0x16c/0x3c0
[   19.375105]  rcu_uaf+0xb0/0x2d8
[   19.375142]  kunit_try_run_case+0x170/0x3f0
[   19.375185]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   19.375235]  kthread+0x328/0x630
[   19.375274]  ret_from_fork+0x10/0x20
[   19.375310] 
[   19.375328] Freed by task 0:
[   19.375366]  kasan_save_stack+0x3c/0x68
[   19.375405]  kasan_save_track+0x20/0x40
[   19.375443]  kasan_save_free_info+0x4c/0x78
[   19.375484]  __kasan_slab_free+0x6c/0x98
[   19.375521]  kfree+0x214/0x3c8
[   19.375556]  rcu_uaf_reclaim+0x28/0x70
[   19.375596]  rcu_core+0x9f4/0x1e20
[   19.375630]  rcu_core_si+0x18/0x30
[   19.375665]  handle_softirqs+0x374/0xb28
[   19.375702]  __do_softirq+0x1c/0x28
[   19.375738] 
[   19.375757] Last potentially related work creation:
[   19.375783]  kasan_save_stack+0x3c/0x68
[   19.375821]  kasan_record_aux_stack+0xb4/0xc8
[   19.375863]  __call_rcu_common.constprop.0+0x70/0x8b0
[   19.375906]  call_rcu+0x18/0x30
[   19.375939]  rcu_uaf+0x14c/0x2d8
[   19.375974]  kunit_try_run_case+0x170/0x3f0
[   19.376015]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   19.376063]  kthread+0x328/0x630
[   19.376098]  ret_from_fork+0x10/0x20
[   19.376135] 
[   19.376155] The buggy address belongs to the object at fff00000c3faa740
[   19.376155]  which belongs to the cache kmalloc-32 of size 32
[   19.376213] The buggy address is located 0 bytes inside of
[   19.376213]  freed 32-byte region [fff00000c3faa740, fff00000c3faa760)
[   19.376273] 
[   19.376295] The buggy address belongs to the physical page:
[   19.376329] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103faa
[   19.378632] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   19.378691] page_type: f5(slab)
[   19.378735] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000
[   19.378787] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   19.378829] page dumped because: kasan: bad access detected
[   19.378862] 
[   19.378880] Memory state around the buggy address:
[   19.378916]  fff00000c3faa600: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc
[   19.378961]  fff00000c3faa680: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   19.379005] >fff00000c3faa700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   19.379051]                                            ^
[   19.379087]  fff00000c3faa780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   19.379129]  fff00000c3faa800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   19.379168] ==================================================================

[   17.335511] ==================================================================
[   17.336237] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60
[   17.336455] Read of size 4 at addr ffff888102b2ef40 by task swapper/0/0
[   17.336939] 
[   17.337126] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G    B            N  6.15.1-rc1 #1 PREEMPT(voluntary) 
[   17.337192] Tainted: [B]=BAD_PAGE, [N]=TEST
[   17.337208] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   17.337236] Call Trace:
[   17.337274]  <IRQ>
[   17.337299]  dump_stack_lvl+0x73/0xb0
[   17.337337]  print_report+0xd1/0x650
[   17.337364]  ? __virt_addr_valid+0x1db/0x2d0
[   17.337393]  ? rcu_uaf_reclaim+0x50/0x60
[   17.337416]  ? kasan_complete_mode_report_info+0x64/0x200
[   17.337441]  ? rcu_uaf_reclaim+0x50/0x60
[   17.337465]  kasan_report+0x141/0x180
[   17.337491]  ? rcu_uaf_reclaim+0x50/0x60
[   17.337520]  __asan_report_load4_noabort+0x18/0x20
[   17.337543]  rcu_uaf_reclaim+0x50/0x60
[   17.337567]  rcu_core+0x66c/0x1c30
[   17.337596]  ? enqueue_hrtimer+0xfe/0x210
[   17.337624]  ? __pfx_rcu_core+0x10/0x10
[   17.337649]  ? ktime_get+0x6b/0x150
[   17.337673]  ? handle_softirqs+0x18e/0x730
[   17.337703]  rcu_core_si+0x12/0x20
[   17.337727]  handle_softirqs+0x209/0x730
[   17.337779]  ? hrtimer_interrupt+0x2fe/0x780
[   17.337807]  ? __pfx_handle_softirqs+0x10/0x10
[   17.337838]  __irq_exit_rcu+0xc9/0x110
[   17.337863]  irq_exit_rcu+0x12/0x20
[   17.337882]  sysvec_apic_timer_interrupt+0x81/0x90
[   17.337911]  </IRQ>
[   17.337944]  <TASK>
[   17.337958]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   17.338075] RIP: 0010:pv_native_safe_halt+0xf/0x20
[   17.338532] 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 83 2d 28 00 fb f4 <e9> fc 1f 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
[   17.338709] RSP: 0000:ffffffff93207dd8 EFLAGS: 00010212
[   17.338868] RAX: ffff8881c6a93000 RBX: ffffffff9321ca80 RCX: ffffffff92007015
[   17.338925] RDX: ffffed102b606103 RSI: 0000000000000004 RDI: 000000000000609c
[   17.338978] RBP: ffffffff93207de0 R08: 0000000000000001 R09: ffffed102b606102
[   17.339029] R10: ffff88815b030813 R11: 0000000000042400 R12: 0000000000000000
[   17.339083] R13: fffffbfff2643950 R14: ffffffff93d9bc10 R15: 0000000000000000
[   17.339286]  ? ct_kernel_exit.constprop.0+0xa5/0xd0
[   17.339396]  ? default_idle+0xd/0x20
[   17.339426]  arch_cpu_idle+0xd/0x20
[   17.339450]  default_idle_call+0x48/0x80
[   17.339475]  do_idle+0x379/0x4f0
[   17.339506]  ? __pfx_do_idle+0x10/0x10
[   17.339534]  ? rest_init+0x10b/0x140
[   17.339560]  cpu_startup_entry+0x5c/0x70
[   17.339587]  rest_init+0x11a/0x140
[   17.339610]  ? acpi_subsystem_init+0x5d/0x150
[   17.339686]  start_kernel+0x32b/0x410
[   17.339715]  x86_64_start_reservations+0x1c/0x30
[   17.339742]  x86_64_start_kernel+0xcf/0xe0
[   17.339786]  common_startup_64+0x13e/0x148
[   17.339830]  </TASK>
[   17.339849] 
[   17.355098] Allocated by task 219:
[   17.355491]  kasan_save_stack+0x45/0x70
[   17.355818]  kasan_save_track+0x18/0x40
[   17.356250]  kasan_save_alloc_info+0x3b/0x50
[   17.356794]  __kasan_kmalloc+0xb7/0xc0
[   17.357051]  __kmalloc_cache_noprof+0x189/0x420
[   17.357591]  rcu_uaf+0xb0/0x330
[   17.357969]  kunit_try_run_case+0x1a5/0x480
[   17.358359]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   17.358567]  kthread+0x337/0x6f0
[   17.358792]  ret_from_fork+0x41/0x80
[   17.359237]  ret_from_fork_asm+0x1a/0x30
[   17.359495] 
[   17.359906] Freed by task 0:
[   17.360228]  kasan_save_stack+0x45/0x70
[   17.360390]  kasan_save_track+0x18/0x40
[   17.360712]  kasan_save_free_info+0x3f/0x60
[   17.361002]  __kasan_slab_free+0x56/0x70
[   17.361202]  kfree+0x222/0x3f0
[   17.361457]  rcu_uaf_reclaim+0x1f/0x60
[   17.361582]  rcu_core+0x66c/0x1c30
[   17.361904]  rcu_core_si+0x12/0x20
[   17.362505]  handle_softirqs+0x209/0x730
[   17.362729]  __irq_exit_rcu+0xc9/0x110
[   17.363000]  irq_exit_rcu+0x12/0x20
[   17.363408]  sysvec_apic_timer_interrupt+0x81/0x90
[   17.363658]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   17.364050] 
[   17.364393] Last potentially related work creation:
[   17.364701]  kasan_save_stack+0x45/0x70
[   17.365019]  kasan_record_aux_stack+0xb2/0xc0
[   17.365460]  __call_rcu_common.constprop.0+0x72/0x9c0
[   17.365852]  call_rcu+0x12/0x20
[   17.365992]  rcu_uaf+0x168/0x330
[   17.366468]  kunit_try_run_case+0x1a5/0x480
[   17.366705]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   17.366993]  kthread+0x337/0x6f0
[   17.367391]  ret_from_fork+0x41/0x80
[   17.367714]  ret_from_fork_asm+0x1a/0x30
[   17.367973] 
[   17.368170] The buggy address belongs to the object at ffff888102b2ef40
[   17.368170]  which belongs to the cache kmalloc-32 of size 32
[   17.368818] The buggy address is located 0 bytes inside of
[   17.368818]  freed 32-byte region [ffff888102b2ef40, ffff888102b2ef60)
[   17.369507] 
[   17.369612] The buggy address belongs to the physical page:
[   17.369905] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b2e
[   17.370455] flags: 0x200000000000000(node=0|zone=2)
[   17.370768] page_type: f5(slab)
[   17.371006] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   17.371344] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   17.371669] page dumped because: kasan: bad access detected
[   17.372033] 
[   17.372163] Memory state around the buggy address:
[   17.372392]  ffff888102b2ee00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   17.373262]  ffff888102b2ee80: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   17.373536] >ffff888102b2ef00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   17.373984]                                            ^
[   17.374487]  ffff888102b2ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.374937]  ffff888102b2f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   17.375520] ==================================================================