[   11.418657] ==================================================================
[   11.419765] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0
[   11.420381] Read of size 16 at addr ffff88810188eea0 by task kunit_try_catch/185
[   11.420838] 
[   11.420945] CPU: 1 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G    B            N  6.15.0-next-20250605 #1 PREEMPT(voluntary) 
[   11.421035] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.421051] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.421072] Call Trace:
[   11.421084]  <TASK>
[   11.421100]  dump_stack_lvl+0x73/0xb0
[   11.421129]  print_report+0xd1/0x650
[   11.421151]  ? __virt_addr_valid+0x1db/0x2d0
[   11.421175]  ? kmalloc_uaf_16+0x47b/0x4c0
[   11.421195]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.421216]  ? kmalloc_uaf_16+0x47b/0x4c0
[   11.421237]  kasan_report+0x141/0x180
[   11.421258]  ? kmalloc_uaf_16+0x47b/0x4c0
[   11.421283]  __asan_report_load16_noabort+0x18/0x20
[   11.421303]  kmalloc_uaf_16+0x47b/0x4c0
[   11.421323]  ? __pfx_kmalloc_uaf_16+0x10/0x10
[   11.421345]  ? __schedule+0x10cc/0x2b60
[   11.421368]  ? __pfx_read_tsc+0x10/0x10
[   11.421389]  ? ktime_get_ts64+0x86/0x230
[   11.421414]  kunit_try_run_case+0x1a5/0x480
[   11.421436]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.421455]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.421479]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.421502]  ? __kthread_parkme+0x82/0x180
[   11.421523]  ? preempt_count_sub+0x50/0x80
[   11.421546]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.421567]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.421590]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.421614]  kthread+0x337/0x6f0
[   11.421643]  ? trace_preempt_on+0x20/0xc0
[   11.421666]  ? __pfx_kthread+0x10/0x10
[   11.421686]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.421707]  ? calculate_sigpending+0x7b/0xa0
[   11.421730]  ? __pfx_kthread+0x10/0x10
[   11.421750]  ret_from_fork+0x116/0x1d0
[   11.421768]  ? __pfx_kthread+0x10/0x10
[   11.421788]  ret_from_fork_asm+0x1a/0x30
[   11.421818]  </TASK>
[   11.421828] 
[   11.433033] Allocated by task 185:
[   11.433187]  kasan_save_stack+0x45/0x70
[   11.433390]  kasan_save_track+0x18/0x40
[   11.433566]  kasan_save_alloc_info+0x3b/0x50
[   11.433792]  __kasan_kmalloc+0xb7/0xc0
[   11.434156]  __kmalloc_cache_noprof+0x189/0x420
[   11.434361]  kmalloc_uaf_16+0x15b/0x4c0
[   11.434527]  kunit_try_run_case+0x1a5/0x480
[   11.434768]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.435010]  kthread+0x337/0x6f0
[   11.435159]  ret_from_fork+0x116/0x1d0
[   11.435290]  ret_from_fork_asm+0x1a/0x30
[   11.435428] 
[   11.435497] Freed by task 185:
[   11.435651]  kasan_save_stack+0x45/0x70
[   11.435870]  kasan_save_track+0x18/0x40
[   11.436068]  kasan_save_free_info+0x3f/0x60
[   11.436273]  __kasan_slab_free+0x56/0x70
[   11.436466]  kfree+0x222/0x3f0
[   11.436607]  kmalloc_uaf_16+0x1d6/0x4c0
[   11.436848]  kunit_try_run_case+0x1a5/0x480
[   11.437132]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.437319]  kthread+0x337/0x6f0
[   11.437443]  ret_from_fork+0x116/0x1d0
[   11.437576]  ret_from_fork_asm+0x1a/0x30
[   11.437771] 
[   11.437865] The buggy address belongs to the object at ffff88810188eea0
[   11.437865]  which belongs to the cache kmalloc-16 of size 16
[   11.438322] The buggy address is located 0 bytes inside of
[   11.438322]  freed 16-byte region [ffff88810188eea0, ffff88810188eeb0)
[   11.438846] 
[   11.438931] The buggy address belongs to the physical page:
[   11.439104] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10188e
[   11.439576] flags: 0x200000000000000(node=0|zone=2)
[   11.439996] page_type: f5(slab)
[   11.440148] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   11.440417] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   11.440848] page dumped because: kasan: bad access detected
[   11.441026] 
[   11.441097] Memory state around the buggy address:
[   11.441336]  ffff88810188ed80: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   11.442114]  ffff88810188ee00: 00 04 fc fc 00 04 fc fc fa fb fc fc fa fb fc fc
[   11.442386] >ffff88810188ee80: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc
[   11.442598]                                ^
[   11.442760]  ffff88810188ef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.443194]  ffff88810188ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.443505] ==================================================================