[   23.502598] ==================================================================
[   23.503151] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380
[   23.503565] Read of size 1 at addr ffff888105376d68 by task kunit_try_catch/233
[   23.504084] 
[   23.504183] CPU: 0 UID: 0 PID: 233 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250716 #1 PREEMPT(voluntary) 
[   23.504530] Tainted: [B]=BAD_PAGE, [N]=TEST
[   23.504545] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   23.504578] Call Trace:
[   23.504592]  <TASK>
[   23.504612]  dump_stack_lvl+0x73/0xb0
[   23.504646]  print_report+0xd1/0x610
[   23.504669]  ? __virt_addr_valid+0x1db/0x2d0
[   23.504694]  ? kmalloc_uaf+0x320/0x380
[   23.504713]  ? kasan_complete_mode_report_info+0x64/0x200
[   23.504738]  ? kmalloc_uaf+0x320/0x380
[   23.504757]  kasan_report+0x141/0x180
[   23.504778]  ? kmalloc_uaf+0x320/0x380
[   23.504804]  __asan_report_load1_noabort+0x18/0x20
[   23.504827]  kmalloc_uaf+0x320/0x380
[   23.504846]  ? __pfx_kmalloc_uaf+0x10/0x10
[   23.504915]  ? __schedule+0x10c6/0x2b60
[   23.504941]  ? __pfx_read_tsc+0x10/0x10
[   23.504962]  ? ktime_get_ts64+0x86/0x230
[   23.504988]  kunit_try_run_case+0x1a5/0x480
[   23.505012]  ? __pfx_kunit_try_run_case+0x10/0x10
[   23.505034]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   23.505055]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   23.505077]  ? __kthread_parkme+0x82/0x180
[   23.505097]  ? preempt_count_sub+0x50/0x80
[   23.505120]  ? __pfx_kunit_try_run_case+0x10/0x10
[   23.505143]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.505168]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   23.505194]  kthread+0x337/0x6f0
[   23.505213]  ? trace_preempt_on+0x20/0xc0
[   23.505236]  ? __pfx_kthread+0x10/0x10
[   23.505256]  ? _raw_spin_unlock_irq+0x47/0x80
[   23.505288]  ? calculate_sigpending+0x7b/0xa0
[   23.505312]  ? __pfx_kthread+0x10/0x10
[   23.505332]  ret_from_fork+0x116/0x1d0
[   23.505351]  ? __pfx_kthread+0x10/0x10
[   23.505371]  ret_from_fork_asm+0x1a/0x30
[   23.505401]  </TASK>
[   23.505413] 
[   23.514810] Allocated by task 233:
[   23.515339]  kasan_save_stack+0x45/0x70
[   23.515548]  kasan_save_track+0x18/0x40
[   23.515925]  kasan_save_alloc_info+0x3b/0x50
[   23.516134]  __kasan_kmalloc+0xb7/0xc0
[   23.516314]  __kmalloc_cache_noprof+0x189/0x420
[   23.516519]  kmalloc_uaf+0xaa/0x380
[   23.516664]  kunit_try_run_case+0x1a5/0x480
[   23.517135]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.517361]  kthread+0x337/0x6f0
[   23.517675]  ret_from_fork+0x116/0x1d0
[   23.517820]  ret_from_fork_asm+0x1a/0x30
[   23.518057] 
[   23.518146] Freed by task 233:
[   23.518368]  kasan_save_stack+0x45/0x70
[   23.518542]  kasan_save_track+0x18/0x40
[   23.519164]  kasan_save_free_info+0x3f/0x60
[   23.519394]  __kasan_slab_free+0x56/0x70
[   23.519566]  kfree+0x222/0x3f0
[   23.519734]  kmalloc_uaf+0x12c/0x380
[   23.519883]  kunit_try_run_case+0x1a5/0x480
[   23.520346]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.520601]  kthread+0x337/0x6f0
[   23.520746]  ret_from_fork+0x116/0x1d0
[   23.520898]  ret_from_fork_asm+0x1a/0x30
[   23.521318] 
[   23.521416] The buggy address belongs to the object at ffff888105376d60
[   23.521416]  which belongs to the cache kmalloc-16 of size 16
[   23.522118] The buggy address is located 8 bytes inside of
[   23.522118]  freed 16-byte region [ffff888105376d60, ffff888105376d70)
[   23.522728] 
[   23.522831] The buggy address belongs to the physical page:
[   23.523300] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105376
[   23.523752] flags: 0x200000000000000(node=0|zone=2)
[   23.523968] page_type: f5(slab)
[   23.524338] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   23.524631] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   23.525397] page dumped because: kasan: bad access detected
[   23.525634] 
[   23.525724] Memory state around the buggy address:
[   23.526178]  ffff888105376c00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   23.526494]  ffff888105376c80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   23.526963] >ffff888105376d00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   23.527259]                                                           ^
[   23.527552]  ffff888105376d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   23.528114]  ffff888105376e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   23.528381] ==================================================================