[   11.002932] ==================================================================
[   11.004064] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0
[   11.004302] Read of size 16 at addr ffff888101892d20 by task kunit_try_catch/186
[   11.004540] 
[   11.004628] CPU: 0 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G    B            N  6.15.0-rc7-next-20250526 #1 PREEMPT(voluntary) 
[   11.004673] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.004685] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.004706] Call Trace:
[   11.004718]  <TASK>
[   11.004734]  dump_stack_lvl+0x73/0xb0
[   11.004761]  print_report+0xd1/0x650
[   11.004785]  ? __virt_addr_valid+0x1db/0x2d0
[   11.004808]  ? kmalloc_uaf_16+0x47b/0x4c0
[   11.004828]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.004851]  ? kmalloc_uaf_16+0x47b/0x4c0
[   11.004871]  kasan_report+0x141/0x180
[   11.004893]  ? kmalloc_uaf_16+0x47b/0x4c0
[   11.004919]  __asan_report_load16_noabort+0x18/0x20
[   11.004939]  kmalloc_uaf_16+0x47b/0x4c0
[   11.004961]  ? __pfx_kmalloc_uaf_16+0x10/0x10
[   11.004983]  ? __schedule+0x10cc/0x2b60
[   11.005008]  ? __pfx_read_tsc+0x10/0x10
[   11.005040]  ? ktime_get_ts64+0x86/0x230
[   11.005066]  kunit_try_run_case+0x1a5/0x480
[   11.005088]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.005107]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.005133]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.005158]  ? __kthread_parkme+0x82/0x180
[   11.005179]  ? preempt_count_sub+0x50/0x80
[   11.005202]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.005223]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.005246]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.005270]  kthread+0x337/0x6f0
[   11.005289]  ? trace_preempt_on+0x20/0xc0
[   11.005314]  ? __pfx_kthread+0x10/0x10
[   11.005334]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.005356]  ? calculate_sigpending+0x7b/0xa0
[   11.005390]  ? __pfx_kthread+0x10/0x10
[   11.005411]  ret_from_fork+0x116/0x1d0
[   11.005430]  ? __pfx_kthread+0x10/0x10
[   11.005450]  ret_from_fork_asm+0x1a/0x30
[   11.005480]  </TASK>
[   11.005491] 
[   11.012470] Allocated by task 186:
[   11.012649]  kasan_save_stack+0x45/0x70
[   11.013028]  kasan_save_track+0x18/0x40
[   11.013247]  kasan_save_alloc_info+0x3b/0x50
[   11.013519]  __kasan_kmalloc+0xb7/0xc0
[   11.013684]  __kmalloc_cache_noprof+0x189/0x420
[   11.013891]  kmalloc_uaf_16+0x15b/0x4c0
[   11.014032]  kunit_try_run_case+0x1a5/0x480
[   11.014177]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.014609]  kthread+0x337/0x6f0
[   11.014921]  ret_from_fork+0x116/0x1d0
[   11.015158]  ret_from_fork_asm+0x1a/0x30
[   11.015320] 
[   11.015422] Freed by task 186:
[   11.015585]  kasan_save_stack+0x45/0x70
[   11.015774]  kasan_save_track+0x18/0x40
[   11.015909]  kasan_save_free_info+0x3f/0x60
[   11.016052]  __kasan_slab_free+0x56/0x70
[   11.016188]  kfree+0x222/0x3f0
[   11.017751]  kmalloc_uaf_16+0x1d6/0x4c0
[   11.018265]  kunit_try_run_case+0x1a5/0x480
[   11.018498]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.018840]  kthread+0x337/0x6f0
[   11.018992]  ret_from_fork+0x116/0x1d0
[   11.019405]  ret_from_fork_asm+0x1a/0x30
[   11.019576] 
[   11.019673] The buggy address belongs to the object at ffff888101892d20
[   11.019673]  which belongs to the cache kmalloc-16 of size 16
[   11.020476] The buggy address is located 0 bytes inside of
[   11.020476]  freed 16-byte region [ffff888101892d20, ffff888101892d30)
[   11.021164] 
[   11.021280] The buggy address belongs to the physical page:
[   11.021525] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101892
[   11.021981] flags: 0x200000000000000(node=0|zone=2)
[   11.022457] page_type: f5(slab)
[   11.022639] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   11.022964] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   11.023415] page dumped because: kasan: bad access detected
[   11.023667] 
[   11.023915] Memory state around the buggy address:
[   11.024190]  ffff888101892c00: 00 02 fc fc 00 02 fc fc 00 02 fc fc fa fb fc fc
[   11.024732]  ffff888101892c80: fa fb fc fc fa fb fc fc 00 05 fc fc fa fb fc fc
[   11.025070] >ffff888101892d00: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc
[   11.025556]                                ^
[   11.025893]  ffff888101892d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.026328]  ffff888101892e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.026745] ==================================================================