[   30.752593] ==================================================================
[   30.753810] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308
[   30.753971] Read of size 1 at addr fff00000c648e3e0 by task kunit_try_catch/224
[   30.754020] 
[   30.754058] CPU: 0 UID: 0 PID: 224 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250715 #1 PREEMPT 
[   30.755319] Tainted: [B]=BAD_PAGE, [N]=TEST
[   30.755836] Hardware name: linux,dummy-virt (DT)
[   30.756025] Call trace:
[   30.756527]  show_stack+0x20/0x38 (C)
[   30.756622]  dump_stack_lvl+0x8c/0xd0
[   30.756670]  print_report+0x118/0x5d0
[   30.757662]  kasan_report+0xdc/0x128
[   30.757832]  __kasan_check_byte+0x54/0x70
[   30.758328]  kfree_sensitive+0x30/0xb0
[   30.759121]  kmalloc_double_kzfree+0x168/0x308
[   30.759193]  kunit_try_run_case+0x170/0x3f0
[   30.759951]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.760024]  kthread+0x328/0x630
[   30.760632]  ret_from_fork+0x10/0x20
[   30.761078] 
[   30.761305] Allocated by task 224:
[   30.761552]  kasan_save_stack+0x3c/0x68
[   30.761942]  kasan_save_track+0x20/0x40
[   30.761987]  kasan_save_alloc_info+0x40/0x58
[   30.762027]  __kasan_kmalloc+0xd4/0xd8
[   30.762066]  __kmalloc_cache_noprof+0x16c/0x3c0
[   30.762977]  kmalloc_double_kzfree+0xb8/0x308
[   30.763267]  kunit_try_run_case+0x170/0x3f0
[   30.763693]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.763869]  kthread+0x328/0x630
[   30.763903]  ret_from_fork+0x10/0x20
[   30.763941] 
[   30.763961] Freed by task 224:
[   30.764859]  kasan_save_stack+0x3c/0x68
[   30.765293]  kasan_save_track+0x20/0x40
[   30.765756]  kasan_save_free_info+0x4c/0x78
[   30.765812]  __kasan_slab_free+0x6c/0x98
[   30.765854]  kfree+0x214/0x3c8
[   30.766465]  kfree_sensitive+0x80/0xb0
[   30.766872]  kmalloc_double_kzfree+0x11c/0x308
[   30.767456]  kunit_try_run_case+0x170/0x3f0
[   30.767519]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.767564]  kthread+0x328/0x630
[   30.767597]  ret_from_fork+0x10/0x20
[   30.767634] 
[   30.768389] The buggy address belongs to the object at fff00000c648e3e0
[   30.768389]  which belongs to the cache kmalloc-16 of size 16
[   30.768469] The buggy address is located 0 bytes inside of
[   30.768469]  freed 16-byte region [fff00000c648e3e0, fff00000c648e3f0)
[   30.769078] 
[   30.769180] The buggy address belongs to the physical page:
[   30.769219] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10648e
[   30.770508] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   30.771382] page_type: f5(slab)
[   30.771481] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000
[   30.771731] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   30.771864] page dumped because: kasan: bad access detected
[   30.771967] 
[   30.772054] Memory state around the buggy address:
[   30.772127]  fff00000c648e280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   30.772182]  fff00000c648e300: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   30.772227] >fff00000c648e380: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   30.772266]                                                        ^
[   30.772306]  fff00000c648e400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.773285]  fff00000c648e480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.773340] ==================================================================

[   24.389588] ==================================================================
[   24.390366] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350
[   24.390719] Read of size 1 at addr ffff888104884660 by task kunit_try_catch/240
[   24.391843] 
[   24.392060] CPU: 1 UID: 0 PID: 240 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250715 #1 PREEMPT(voluntary) 
[   24.392113] Tainted: [B]=BAD_PAGE, [N]=TEST
[   24.392126] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   24.392147] Call Trace:
[   24.392159]  <TASK>
[   24.392176]  dump_stack_lvl+0x73/0xb0
[   24.392209]  print_report+0xd1/0x610
[   24.392232]  ? __virt_addr_valid+0x1db/0x2d0
[   24.392255]  ? kmalloc_double_kzfree+0x19c/0x350
[   24.392277]  ? kasan_complete_mode_report_info+0x64/0x200
[   24.392303]  ? kmalloc_double_kzfree+0x19c/0x350
[   24.392325]  kasan_report+0x141/0x180
[   24.392346]  ? kmalloc_double_kzfree+0x19c/0x350
[   24.392371]  ? kmalloc_double_kzfree+0x19c/0x350
[   24.392393]  __kasan_check_byte+0x3d/0x50
[   24.392414]  kfree_sensitive+0x22/0x90
[   24.392437]  kmalloc_double_kzfree+0x19c/0x350
[   24.392459]  ? __pfx_kmalloc_double_kzfree+0x10/0x10
[   24.392483]  ? __schedule+0x10cc/0x2b60
[   24.392505]  ? __pfx_read_tsc+0x10/0x10
[   24.392542]  ? ktime_get_ts64+0x86/0x230
[   24.392572]  kunit_try_run_case+0x1a5/0x480
[   24.392596]  ? __pfx_kunit_try_run_case+0x10/0x10
[   24.392617]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   24.392639]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   24.392661]  ? __kthread_parkme+0x82/0x180
[   24.392681]  ? preempt_count_sub+0x50/0x80
[   24.392704]  ? __pfx_kunit_try_run_case+0x10/0x10
[   24.392726]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.392751]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   24.392777]  kthread+0x337/0x6f0
[   24.392796]  ? trace_preempt_on+0x20/0xc0
[   24.392819]  ? __pfx_kthread+0x10/0x10
[   24.392840]  ? _raw_spin_unlock_irq+0x47/0x80
[   24.392864]  ? calculate_sigpending+0x7b/0xa0
[   24.392887]  ? __pfx_kthread+0x10/0x10
[   24.392908]  ret_from_fork+0x116/0x1d0
[   24.392927]  ? __pfx_kthread+0x10/0x10
[   24.392946]  ret_from_fork_asm+0x1a/0x30
[   24.392978]  </TASK>
[   24.392989] 
[   24.404478] Allocated by task 240:
[   24.404783]  kasan_save_stack+0x45/0x70
[   24.404989]  kasan_save_track+0x18/0x40
[   24.405158]  kasan_save_alloc_info+0x3b/0x50
[   24.405297]  __kasan_kmalloc+0xb7/0xc0
[   24.405454]  __kmalloc_cache_noprof+0x189/0x420
[   24.405823]  kmalloc_double_kzfree+0xa9/0x350
[   24.406067]  kunit_try_run_case+0x1a5/0x480
[   24.406287]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.406537]  kthread+0x337/0x6f0
[   24.406801]  ret_from_fork+0x116/0x1d0
[   24.406986]  ret_from_fork_asm+0x1a/0x30
[   24.407178] 
[   24.407278] Freed by task 240:
[   24.407409]  kasan_save_stack+0x45/0x70
[   24.407549]  kasan_save_track+0x18/0x40
[   24.407854]  kasan_save_free_info+0x3f/0x60
[   24.408078]  __kasan_slab_free+0x56/0x70
[   24.408268]  kfree+0x222/0x3f0
[   24.408444]  kfree_sensitive+0x67/0x90
[   24.408876]  kmalloc_double_kzfree+0x12b/0x350
[   24.409077]  kunit_try_run_case+0x1a5/0x480
[   24.409280]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.409470]  kthread+0x337/0x6f0
[   24.409661]  ret_from_fork+0x116/0x1d0
[   24.409889]  ret_from_fork_asm+0x1a/0x30
[   24.410083] 
[   24.410279] The buggy address belongs to the object at ffff888104884660
[   24.410279]  which belongs to the cache kmalloc-16 of size 16
[   24.410829] The buggy address is located 0 bytes inside of
[   24.410829]  freed 16-byte region [ffff888104884660, ffff888104884670)
[   24.411341] 
[   24.411408] The buggy address belongs to the physical page:
[   24.411724] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104884
[   24.412130] flags: 0x200000000000000(node=0|zone=2)
[   24.412294] page_type: f5(slab)
[   24.412475] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122
[   24.412919] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   24.413225] page dumped because: kasan: bad access detected
[   24.413458] 
[   24.413554] Memory state around the buggy address:
[   24.413991]  ffff888104884500: 00 06 fc fc 00 06 fc fc 00 06 fc fc 00 00 fc fc
[   24.414301]  ffff888104884580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   24.414517] >ffff888104884600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   24.414860]                                                        ^
[   24.415138]  ffff888104884680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.415392]  ffff888104884700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.415811] ==================================================================