[   11.693790] ==================================================================
[   11.694346] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380
[   11.694609] Read of size 1 at addr ffff8881027a10c8 by task kunit_try_catch/201
[   11.694905] 
[   11.695019] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc4 #1 PREEMPT(voluntary) 
[   11.695073] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.695085] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.695106] Call Trace:
[   11.695118]  <TASK>
[   11.695132]  dump_stack_lvl+0x73/0xb0
[   11.695160]  print_report+0xd1/0x650
[   11.695182]  ? __virt_addr_valid+0x1db/0x2d0
[   11.695204]  ? kmalloc_uaf+0x320/0x380
[   11.695223]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.695243]  ? kmalloc_uaf+0x320/0x380
[   11.695262]  kasan_report+0x141/0x180
[   11.695282]  ? kmalloc_uaf+0x320/0x380
[   11.695306]  __asan_report_load1_noabort+0x18/0x20
[   11.695329]  kmalloc_uaf+0x320/0x380
[   11.695347]  ? __pfx_kmalloc_uaf+0x10/0x10
[   11.695367]  ? __schedule+0x10cc/0x2b60
[   11.695387]  ? __pfx_read_tsc+0x10/0x10
[   11.695407]  ? ktime_get_ts64+0x86/0x230
[   11.695431]  kunit_try_run_case+0x1a5/0x480
[   11.695453]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.695474]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.695495]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.695516]  ? __kthread_parkme+0x82/0x180
[   11.695535]  ? preempt_count_sub+0x50/0x80
[   11.695558]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.695579]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.695600]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.695622]  kthread+0x337/0x6f0
[   11.695657]  ? trace_preempt_on+0x20/0xc0
[   11.695679]  ? __pfx_kthread+0x10/0x10
[   11.695698]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.695718]  ? calculate_sigpending+0x7b/0xa0
[   11.695739]  ? __pfx_kthread+0x10/0x10
[   11.695760]  ret_from_fork+0x116/0x1d0
[   11.695776]  ? __pfx_kthread+0x10/0x10
[   11.695796]  ret_from_fork_asm+0x1a/0x30
[   11.695825]  </TASK>
[   11.695835] 
[   11.702529] Allocated by task 201:
[   11.702713]  kasan_save_stack+0x45/0x70
[   11.702882]  kasan_save_track+0x18/0x40
[   11.705125]  kasan_save_alloc_info+0x3b/0x50
[   11.705370]  __kasan_kmalloc+0xb7/0xc0
[   11.705545]  __kmalloc_cache_noprof+0x189/0x420
[   11.705731]  kmalloc_uaf+0xaa/0x380
[   11.705858]  kunit_try_run_case+0x1a5/0x480
[   11.706073]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.706421]  kthread+0x337/0x6f0
[   11.706543]  ret_from_fork+0x116/0x1d0
[   11.706730]  ret_from_fork_asm+0x1a/0x30
[   11.706927] 
[   11.707021] Freed by task 201:
[   11.708057]  kasan_save_stack+0x45/0x70
[   11.710165]  kasan_save_track+0x18/0x40
[   11.710343]  kasan_save_free_info+0x3f/0x60
[   11.710490]  __kasan_slab_free+0x56/0x70
[   11.710685]  kfree+0x222/0x3f0
[   11.710821]  kmalloc_uaf+0x12c/0x380
[   11.710979]  kunit_try_run_case+0x1a5/0x480
[   11.711195]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.711471]  kthread+0x337/0x6f0
[   11.711639]  ret_from_fork+0x116/0x1d0
[   11.711803]  ret_from_fork_asm+0x1a/0x30
[   11.711968] 
[   11.712073] The buggy address belongs to the object at ffff8881027a10c0
[   11.712073]  which belongs to the cache kmalloc-16 of size 16
[   11.712459] The buggy address is located 8 bytes inside of
[   11.712459]  freed 16-byte region [ffff8881027a10c0, ffff8881027a10d0)
[   11.714069] 
[   11.714165] The buggy address belongs to the physical page:
[   11.714390] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027a1
[   11.714690] flags: 0x200000000000000(node=0|zone=2)
[   11.714898] page_type: f5(slab)
[   11.715059] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   11.715356] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   11.715652] page dumped because: kasan: bad access detected
[   11.715865] 
[   11.715953] Memory state around the buggy address:
[   11.717206]  ffff8881027a0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.717988]  ffff8881027a1000: fa fb fc fc fa fb fc fc 00 05 fc fc fa fb fc fc
[   11.720085] >ffff8881027a1080: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc
[   11.721342]                                               ^
[   11.721565]  ffff8881027a1100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.721857]  ffff8881027a1180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.722166] ==================================================================