[   17.922800] ==================================================================
[   17.922872] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438
[   17.922930] Read of size 16 at addr fff00000c59e55c0 by task kunit_try_catch/170
[   17.922980] 
[   17.923012] CPU: 0 UID: 0 PID: 170 Comm: kunit_try_catch Tainted: G    B            N  6.15.4-rc3 #1 PREEMPT 
[   17.923095] Tainted: [B]=BAD_PAGE, [N]=TEST
[   17.923122] Hardware name: linux,dummy-virt (DT)
[   17.923160] Call trace:
[   17.923182]  show_stack+0x20/0x38 (C)
[   17.923229]  dump_stack_lvl+0x8c/0xd0
[   17.923277]  print_report+0x118/0x608
[   17.923322]  kasan_report+0xdc/0x128
[   17.924711]  __asan_report_load16_noabort+0x20/0x30
[   17.924785]  kmalloc_uaf_16+0x3bc/0x438
[   17.925274]  kunit_try_run_case+0x170/0x3f0
[   17.925328]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   17.925617]  kthread+0x328/0x630
[   17.925670]  ret_from_fork+0x10/0x20
[   17.925718] 
[   17.925737] Allocated by task 170:
[   17.926277]  kasan_save_stack+0x3c/0x68
[   17.926386]  kasan_save_track+0x20/0x40
[   17.926430]  kasan_save_alloc_info+0x40/0x58
[   17.926468]  __kasan_kmalloc+0xd4/0xd8
[   17.926542]  __kmalloc_cache_noprof+0x16c/0x3c0
[   17.926610]  kmalloc_uaf_16+0x140/0x438
[   17.926712]  kunit_try_run_case+0x170/0x3f0
[   17.926752]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   17.926845]  kthread+0x328/0x630
[   17.927036]  ret_from_fork+0x10/0x20
[   17.927073] 
[   17.927091] Freed by task 170:
[   17.927454]  kasan_save_stack+0x3c/0x68
[   17.927691]  kasan_save_track+0x20/0x40
[   17.927728]  kasan_save_free_info+0x4c/0x78
[   17.927767]  __kasan_slab_free+0x6c/0x98
[   17.927803]  kfree+0x214/0x3c8
[   17.927835]  kmalloc_uaf_16+0x190/0x438
[   17.928187]  kunit_try_run_case+0x170/0x3f0
[   17.928231]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   17.928302]  kthread+0x328/0x630
[   17.928530]  ret_from_fork+0x10/0x20
[   17.928824] 
[   17.928991] The buggy address belongs to the object at fff00000c59e55c0
[   17.928991]  which belongs to the cache kmalloc-16 of size 16
[   17.929178] The buggy address is located 0 bytes inside of
[   17.929178]  freed 16-byte region [fff00000c59e55c0, fff00000c59e55d0)
[   17.929243] 
[   17.929262] The buggy address belongs to the physical page:
[   17.929638] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059e5
[   17.929944] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   17.930000] page_type: f5(slab)
[   17.930048] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000
[   17.930370] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   17.930423] page dumped because: kasan: bad access detected
[   17.930464] 
[   17.930483] Memory state around the buggy address:
[   17.930515]  fff00000c59e5480: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   17.930891]  fff00000c59e5500: fa fb fc fc 00 04 fc fc fa fb fc fc fa fb fc fc
[   17.931400] >fff00000c59e5580: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc
[   17.931718]                                            ^
[   17.931760]  fff00000c59e5600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.931847]  fff00000c59e5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.932246] ==================================================================

[   10.901952] ==================================================================
[   10.902390] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0
[   10.902703] Read of size 16 at addr ffff8881025a7f80 by task kunit_try_catch/187
[   10.902983] 
[   10.903104] CPU: 1 UID: 0 PID: 187 Comm: kunit_try_catch Tainted: G    B            N  6.15.4-rc3 #1 PREEMPT(voluntary) 
[   10.903154] Tainted: [B]=BAD_PAGE, [N]=TEST
[   10.903166] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   10.903188] Call Trace:
[   10.903200]  <TASK>
[   10.903218]  dump_stack_lvl+0x73/0xb0
[   10.903245]  print_report+0xd1/0x650
[   10.903268]  ? __virt_addr_valid+0x1db/0x2d0
[   10.903291]  ? kmalloc_uaf_16+0x47b/0x4c0
[   10.903311]  ? kasan_complete_mode_report_info+0x64/0x200
[   10.903333]  ? kmalloc_uaf_16+0x47b/0x4c0
[   10.903354]  kasan_report+0x141/0x180
[   10.903376]  ? kmalloc_uaf_16+0x47b/0x4c0
[   10.903402]  __asan_report_load16_noabort+0x18/0x20
[   10.903422]  kmalloc_uaf_16+0x47b/0x4c0
[   10.903443]  ? __pfx_kmalloc_uaf_16+0x10/0x10
[   10.903465]  ? __schedule+0x10cc/0x2b60
[   10.903487]  ? __pfx_read_tsc+0x10/0x10
[   10.903507]  ? ktime_get_ts64+0x86/0x230
[   10.903533]  kunit_try_run_case+0x1a5/0x480
[   10.903559]  ? __pfx_kunit_try_run_case+0x10/0x10
[   10.903581]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   10.903604]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   10.903627]  ? __kthread_parkme+0x82/0x180
[   10.903648]  ? preempt_count_sub+0x50/0x80
[   10.903675]  ? __pfx_kunit_try_run_case+0x10/0x10
[   10.903699]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   10.903723]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   10.903746]  kthread+0x337/0x6f0
[   10.903763]  ? trace_preempt_on+0x20/0xc0
[   10.903787]  ? __pfx_kthread+0x10/0x10
[   10.903805]  ? _raw_spin_unlock_irq+0x47/0x80
[   10.903825]  ? calculate_sigpending+0x7b/0xa0
[   10.903859]  ? __pfx_kthread+0x10/0x10
[   10.903878]  ret_from_fork+0x41/0x80
[   10.903898]  ? __pfx_kthread+0x10/0x10
[   10.903928]  ret_from_fork_asm+0x1a/0x30
[   10.903959]  </TASK>
[   10.903971] 
[   10.913525] Allocated by task 187:
[   10.913709]  kasan_save_stack+0x45/0x70
[   10.914197]  kasan_save_track+0x18/0x40
[   10.914478]  kasan_save_alloc_info+0x3b/0x50
[   10.914936]  __kasan_kmalloc+0xb7/0xc0
[   10.915195]  __kmalloc_cache_noprof+0x189/0x420
[   10.915411]  kmalloc_uaf_16+0x15b/0x4c0
[   10.915777]  kunit_try_run_case+0x1a5/0x480
[   10.916031]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   10.916394]  kthread+0x337/0x6f0
[   10.916556]  ret_from_fork+0x41/0x80
[   10.916721]  ret_from_fork_asm+0x1a/0x30
[   10.916979] 
[   10.917068] Freed by task 187:
[   10.917205]  kasan_save_stack+0x45/0x70
[   10.917380]  kasan_save_track+0x18/0x40
[   10.917556]  kasan_save_free_info+0x3f/0x60
[   10.918167]  __kasan_slab_free+0x56/0x70
[   10.918420]  kfree+0x222/0x3f0
[   10.918711]  kmalloc_uaf_16+0x1d6/0x4c0
[   10.919124]  kunit_try_run_case+0x1a5/0x480
[   10.919485]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   10.920086]  kthread+0x337/0x6f0
[   10.920265]  ret_from_fork+0x41/0x80
[   10.920433]  ret_from_fork_asm+0x1a/0x30
[   10.920682] 
[   10.920984] The buggy address belongs to the object at ffff8881025a7f80
[   10.920984]  which belongs to the cache kmalloc-16 of size 16
[   10.921886] The buggy address is located 0 bytes inside of
[   10.921886]  freed 16-byte region [ffff8881025a7f80, ffff8881025a7f90)
[   10.922688] 
[   10.922794] The buggy address belongs to the physical page:
[   10.923293] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025a7
[   10.923597] flags: 0x200000000000000(node=0|zone=2)
[   10.924137] page_type: f5(slab)
[   10.924304] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   10.924571] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   10.925209] page dumped because: kasan: bad access detected
[   10.925607] 
[   10.925759] Memory state around the buggy address:
[   10.925957]  ffff8881025a7e80: 00 06 fc fc 00 06 fc fc 00 00 fc fc fa fb fc fc
[   10.926278]  ffff8881025a7f00: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
[   10.926566] >ffff8881025a7f80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   10.927182]                    ^
[   10.927313]  ffff8881025a8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.927725]  ffff8881025a8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   10.928284] ==================================================================