[   11.521645] ==================================================================
[   11.522740] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380
[   11.523168] Read of size 1 at addr ffff88810242c928 by task kunit_try_catch/204
[   11.523403] 
[   11.523497] CPU: 0 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G    B            N  6.15.6-rc1 #1 PREEMPT(voluntary) 
[   11.523553] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.523565] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.523594] Call Trace:
[   11.523608]  <TASK>
[   11.523625]  dump_stack_lvl+0x73/0xb0
[   11.523653]  print_report+0xd1/0x650
[   11.523678]  ? __virt_addr_valid+0x1db/0x2d0
[   11.523702]  ? kmalloc_uaf+0x320/0x380
[   11.523723]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.523771]  ? kmalloc_uaf+0x320/0x380
[   11.523978]  kasan_report+0x141/0x180
[   11.524010]  ? kmalloc_uaf+0x320/0x380
[   11.524038]  __asan_report_load1_noabort+0x18/0x20
[   11.524060]  kmalloc_uaf+0x320/0x380
[   11.524100]  ? __pfx_kmalloc_uaf+0x10/0x10
[   11.524123]  ? __schedule+0x10cc/0x2b60
[   11.524148]  ? __pfx_read_tsc+0x10/0x10
[   11.524169]  ? ktime_get_ts64+0x86/0x230
[   11.524196]  kunit_try_run_case+0x1a5/0x480
[   11.524219]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.524239]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.524264]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.524310]  ? __kthread_parkme+0x82/0x180
[   11.524334]  ? preempt_count_sub+0x50/0x80
[   11.524372]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.524393]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.524416]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.524440]  kthread+0x337/0x6f0
[   11.524457]  ? trace_preempt_on+0x20/0xc0
[   11.524483]  ? __pfx_kthread+0x10/0x10
[   11.524501]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.524524]  ? calculate_sigpending+0x7b/0xa0
[   11.524546]  ? __pfx_kthread+0x10/0x10
[   11.524565]  ret_from_fork+0x41/0x80
[   11.524587]  ? __pfx_kthread+0x10/0x10
[   11.524605]  ret_from_fork_asm+0x1a/0x30
[   11.524636]  </TASK>
[   11.524647] 
[   11.538501] Allocated by task 204:
[   11.538925]  kasan_save_stack+0x45/0x70
[   11.539310]  kasan_save_track+0x18/0x40
[   11.539803]  kasan_save_alloc_info+0x3b/0x50
[   11.540162]  __kasan_kmalloc+0xb7/0xc0
[   11.540304]  __kmalloc_cache_noprof+0x189/0x420
[   11.540458]  kmalloc_uaf+0xaa/0x380
[   11.540739]  kunit_try_run_case+0x1a5/0x480
[   11.541462]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.542183]  kthread+0x337/0x6f0
[   11.542819]  ret_from_fork+0x41/0x80
[   11.543310]  ret_from_fork_asm+0x1a/0x30
[   11.543525] 
[   11.543801] Freed by task 204:
[   11.544274]  kasan_save_stack+0x45/0x70
[   11.544505]  kasan_save_track+0x18/0x40
[   11.545085]  kasan_save_free_info+0x3f/0x60
[   11.545423]  __kasan_slab_free+0x56/0x70
[   11.545601]  kfree+0x222/0x3f0
[   11.546107]  kmalloc_uaf+0x12c/0x380
[   11.546541]  kunit_try_run_case+0x1a5/0x480
[   11.546989]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.547172]  kthread+0x337/0x6f0
[   11.547291]  ret_from_fork+0x41/0x80
[   11.547421]  ret_from_fork_asm+0x1a/0x30
[   11.547578] 
[   11.547651] The buggy address belongs to the object at ffff88810242c920
[   11.547651]  which belongs to the cache kmalloc-16 of size 16
[   11.548345] The buggy address is located 8 bytes inside of
[   11.548345]  freed 16-byte region [ffff88810242c920, ffff88810242c930)
[   11.549227] 
[   11.549311] The buggy address belongs to the physical page:
[   11.549686] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10242c
[   11.550283] flags: 0x200000000000000(node=0|zone=2)
[   11.550555] page_type: f5(slab)
[   11.550729] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   11.551184] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   11.551535] page dumped because: kasan: bad access detected
[   11.551847] 
[   11.552047] Memory state around the buggy address:
[   11.552215]  ffff88810242c800: 00 04 fc fc 00 00 fc fc 00 04 fc fc 00 04 fc fc
[   11.552487]  ffff88810242c880: 00 00 fc fc 00 04 fc fc fa fb fc fc fa fb fc fc
[   11.553101] >ffff88810242c900: 00 05 fc fc fa fb fc fc fc fc fc fc fc fc fc fc
[   11.553383]                                   ^
[   11.553697]  ffff88810242c980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.553993]  ffff88810242ca00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.554421] ==================================================================