[   11.408248] ==================================================================
[   11.408698] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520
[   11.409406] Read of size 1 at addr ffff888103075ea8 by task kunit_try_catch/208
[   11.410279] 
[   11.410523] CPU: 0 UID: 0 PID: 208 Comm: kunit_try_catch Tainted: G    B            N  6.15.8-rc1 #1 PREEMPT(voluntary) 
[   11.410571] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.410582] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.410604] Call Trace:
[   11.410619]  <TASK>
[   11.410638]  dump_stack_lvl+0x73/0xb0
[   11.410740]  print_report+0xd1/0x610
[   11.410769]  ? __virt_addr_valid+0x1db/0x2d0
[   11.410791]  ? kmalloc_uaf2+0x4a8/0x520
[   11.410811]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.410833]  ? kmalloc_uaf2+0x4a8/0x520
[   11.410888]  kasan_report+0x141/0x180
[   11.410910]  ? kmalloc_uaf2+0x4a8/0x520
[   11.410935]  __asan_report_load1_noabort+0x18/0x20
[   11.410955]  kmalloc_uaf2+0x4a8/0x520
[   11.410975]  ? __pfx_kmalloc_uaf2+0x10/0x10
[   11.410994]  ? finish_task_switch.isra.0+0x153/0x700
[   11.411019]  ? __switch_to+0x5d9/0xf60
[   11.411066]  ? dequeue_task_fair+0x166/0x4e0
[   11.411092]  ? __schedule+0x10c6/0x2b60
[   11.411117]  ? __pfx_read_tsc+0x10/0x10
[   11.411137]  ? ktime_get_ts64+0x86/0x230
[   11.411162]  kunit_try_run_case+0x1a5/0x480
[   11.411183]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.411201]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.411232]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.411256]  ? __kthread_parkme+0x82/0x180
[   11.411278]  ? preempt_count_sub+0x50/0x80
[   11.411302]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.411321]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.411343]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.411365]  kthread+0x337/0x6f0
[   11.411382]  ? trace_preempt_on+0x20/0xc0
[   11.411405]  ? __pfx_kthread+0x10/0x10
[   11.411422]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.411444]  ? calculate_sigpending+0x7b/0xa0
[   11.411466]  ? __pfx_kthread+0x10/0x10
[   11.411483]  ret_from_fork+0x41/0x80
[   11.411503]  ? __pfx_kthread+0x10/0x10
[   11.411520]  ret_from_fork_asm+0x1a/0x30
[   11.411552]  </TASK>
[   11.411563] 
[   11.419472] Allocated by task 208:
[   11.419740]  kasan_save_stack+0x45/0x70
[   11.419974]  kasan_save_track+0x18/0x40
[   11.420173]  kasan_save_alloc_info+0x3b/0x50
[   11.420450]  __kasan_kmalloc+0xb7/0xc0
[   11.420590]  __kmalloc_cache_noprof+0x189/0x420
[   11.421027]  kmalloc_uaf2+0xc6/0x520
[   11.421259]  kunit_try_run_case+0x1a5/0x480
[   11.421477]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.421891]  kthread+0x337/0x6f0
[   11.422090]  ret_from_fork+0x41/0x80
[   11.422309]  ret_from_fork_asm+0x1a/0x30
[   11.422586] 
[   11.422753] Freed by task 208:
[   11.422863]  kasan_save_stack+0x45/0x70
[   11.422998]  kasan_save_track+0x18/0x40
[   11.423129]  kasan_save_free_info+0x3f/0x60
[   11.423345]  __kasan_slab_free+0x56/0x70
[   11.423537]  kfree+0x222/0x3f0
[   11.423696]  kmalloc_uaf2+0x14c/0x520
[   11.423883]  kunit_try_run_case+0x1a5/0x480
[   11.424051]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.424219]  kthread+0x337/0x6f0
[   11.424341]  ret_from_fork+0x41/0x80
[   11.424525]  ret_from_fork_asm+0x1a/0x30
[   11.424720] 
[   11.424812] The buggy address belongs to the object at ffff888103075e80
[   11.424812]  which belongs to the cache kmalloc-64 of size 64
[   11.425517] The buggy address is located 40 bytes inside of
[   11.425517]  freed 64-byte region [ffff888103075e80, ffff888103075ec0)
[   11.426177] 
[   11.426297] The buggy address belongs to the physical page:
[   11.426574] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103075
[   11.426810] flags: 0x200000000000000(node=0|zone=2)
[   11.426969] page_type: f5(slab)
[   11.427088] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   11.427321] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   11.427786] page dumped because: kasan: bad access detected
[   11.428103] 
[   11.428233] Memory state around the buggy address:
[   11.428514]  ffff888103075d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.429076]  ffff888103075e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.429980] >ffff888103075e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.431101]                                   ^
[   11.431279]  ffff888103075f00: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc
[   11.432088]  ffff888103075f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.432827] ==================================================================