[   13.253032] ==================================================================
[   13.253322] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80
[   13.253618] Read of size 1 at addr ffff88810360c050 by task kunit_try_catch/279
[   13.254202] 
[   13.254303] CPU: 0 UID: 0 PID: 279 Comm: kunit_try_catch Tainted: G    B            N  6.15.6-rc1 #1 PREEMPT(voluntary) 
[   13.254349] Tainted: [B]=BAD_PAGE, [N]=TEST
[   13.254361] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   13.254384] Call Trace:
[   13.254401]  <TASK>
[   13.254417]  dump_stack_lvl+0x73/0xb0
[   13.254445]  print_report+0xd1/0x650
[   13.254467]  ? __virt_addr_valid+0x1db/0x2d0
[   13.254490]  ? kasan_strings+0xcbc/0xe80
[   13.254511]  ? kasan_complete_mode_report_info+0x64/0x200
[   13.254548]  ? kasan_strings+0xcbc/0xe80
[   13.254571]  kasan_report+0x141/0x180
[   13.254594]  ? kasan_strings+0xcbc/0xe80
[   13.254620]  __asan_report_load1_noabort+0x18/0x20
[   13.254642]  kasan_strings+0xcbc/0xe80
[   13.254663]  ? trace_hardirqs_on+0x37/0xe0
[   13.254688]  ? __pfx_kasan_strings+0x10/0x10
[   13.254710]  ? finish_task_switch.isra.0+0x153/0x700
[   13.254736]  ? __switch_to+0x5d9/0xf60
[   13.254757]  ? dequeue_task_fair+0x166/0x4e0
[   13.254782]  ? __schedule+0x10cc/0x2b60
[   13.254806]  ? __pfx_read_tsc+0x10/0x10
[   13.254826]  ? ktime_get_ts64+0x86/0x230
[   13.255124]  kunit_try_run_case+0x1a5/0x480
[   13.255153]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.255173]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   13.255199]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   13.255224]  ? __kthread_parkme+0x82/0x180
[   13.255247]  ? preempt_count_sub+0x50/0x80
[   13.255273]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.255294]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.255318]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   13.255343]  kthread+0x337/0x6f0
[   13.255360]  ? trace_preempt_on+0x20/0xc0
[   13.255383]  ? __pfx_kthread+0x10/0x10
[   13.255402]  ? _raw_spin_unlock_irq+0x47/0x80
[   13.255425]  ? calculate_sigpending+0x7b/0xa0
[   13.255447]  ? __pfx_kthread+0x10/0x10
[   13.255466]  ret_from_fork+0x41/0x80
[   13.255487]  ? __pfx_kthread+0x10/0x10
[   13.255506]  ret_from_fork_asm+0x1a/0x30
[   13.255537]  </TASK>
[   13.255549] 
[   13.263549] Allocated by task 279:
[   13.263754]  kasan_save_stack+0x45/0x70
[   13.264031]  kasan_save_track+0x18/0x40
[   13.264204]  kasan_save_alloc_info+0x3b/0x50
[   13.264354]  __kasan_kmalloc+0xb7/0xc0
[   13.264547]  __kmalloc_cache_noprof+0x189/0x420
[   13.265010]  kasan_strings+0xc0/0xe80
[   13.265174]  kunit_try_run_case+0x1a5/0x480
[   13.265431]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.265681]  kthread+0x337/0x6f0
[   13.265829]  ret_from_fork+0x41/0x80
[   13.266006]  ret_from_fork_asm+0x1a/0x30
[   13.266184] 
[   13.266286] Freed by task 279:
[   13.266454]  kasan_save_stack+0x45/0x70
[   13.266610]  kasan_save_track+0x18/0x40
[   13.266747]  kasan_save_free_info+0x3f/0x60
[   13.266943]  __kasan_slab_free+0x56/0x70
[   13.267155]  kfree+0x222/0x3f0
[   13.267319]  kasan_strings+0x2aa/0xe80
[   13.267519]  kunit_try_run_case+0x1a5/0x480
[   13.267720]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.267914]  kthread+0x337/0x6f0
[   13.268134]  ret_from_fork+0x41/0x80
[   13.268325]  ret_from_fork_asm+0x1a/0x30
[   13.268524] 
[   13.268627] The buggy address belongs to the object at ffff88810360c040
[   13.268627]  which belongs to the cache kmalloc-32 of size 32
[   13.269154] The buggy address is located 16 bytes inside of
[   13.269154]  freed 32-byte region [ffff88810360c040, ffff88810360c060)
[   13.269688] 
[   13.269790] The buggy address belongs to the physical page:
[   13.270072] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10360c
[   13.270361] flags: 0x200000000000000(node=0|zone=2)
[   13.270526] page_type: f5(slab)
[   13.270648] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   13.270893] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   13.271408] page dumped because: kasan: bad access detected
[   13.271907] 
[   13.272007] Memory state around the buggy address:
[   13.272238]  ffff88810360bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.272586]  ffff88810360bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.272887] >ffff88810360c000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   13.273167]                                                  ^
[   13.273369]  ffff88810360c080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   13.273822]  ffff88810360c100: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   13.274406] ==================================================================