[   13.107355] ==================================================================
[   13.108802] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0
[   13.109105] Read of size 1 at addr ffff88810314dfd0 by task kunit_try_catch/278
[   13.109524] 
[   13.109639] CPU: 0 UID: 0 PID: 278 Comm: kunit_try_catch Tainted: G    B            N  6.15.5-rc1 #1 PREEMPT(voluntary) 
[   13.109692] Tainted: [B]=BAD_PAGE, [N]=TEST
[   13.109741] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   13.109767] Call Trace:
[   13.109804]  <TASK>
[   13.109827]  dump_stack_lvl+0x73/0xb0
[   13.109854]  print_report+0xd1/0x650
[   13.109882]  ? __virt_addr_valid+0x1db/0x2d0
[   13.109907]  ? strcmp+0xb0/0xc0
[   13.109925]  ? kasan_complete_mode_report_info+0x64/0x200
[   13.109949]  ? strcmp+0xb0/0xc0
[   13.109968]  kasan_report+0x141/0x180
[   13.109991]  ? strcmp+0xb0/0xc0
[   13.110015]  __asan_report_load1_noabort+0x18/0x20
[   13.110068]  strcmp+0xb0/0xc0
[   13.110089]  kasan_strings+0x431/0xe80
[   13.110111]  ? trace_hardirqs_on+0x37/0xe0
[   13.110136]  ? __pfx_kasan_strings+0x10/0x10
[   13.110157]  ? finish_task_switch.isra.0+0x153/0x700
[   13.110182]  ? __switch_to+0x5d9/0xf60
[   13.110246]  ? dequeue_task_fair+0x166/0x4e0
[   13.110271]  ? __schedule+0x10cc/0x2b60
[   13.110296]  ? __pfx_read_tsc+0x10/0x10
[   13.110316]  ? ktime_get_ts64+0x86/0x230
[   13.110342]  kunit_try_run_case+0x1a5/0x480
[   13.110369]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.110393]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   13.110417]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   13.110440]  ? __kthread_parkme+0x82/0x180
[   13.110463]  ? preempt_count_sub+0x50/0x80
[   13.110488]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.110511]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.110534]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   13.110557]  kthread+0x337/0x6f0
[   13.110574]  ? trace_preempt_on+0x20/0xc0
[   13.110597]  ? __pfx_kthread+0x10/0x10
[   13.110615]  ? _raw_spin_unlock_irq+0x47/0x80
[   13.110638]  ? calculate_sigpending+0x7b/0xa0
[   13.110661]  ? __pfx_kthread+0x10/0x10
[   13.110679]  ret_from_fork+0x41/0x80
[   13.110701]  ? __pfx_kthread+0x10/0x10
[   13.110719]  ret_from_fork_asm+0x1a/0x30
[   13.110751]  </TASK>
[   13.110762] 
[   13.120522] Allocated by task 278:
[   13.120867]  kasan_save_stack+0x45/0x70
[   13.121165]  kasan_save_track+0x18/0x40
[   13.121469]  kasan_save_alloc_info+0x3b/0x50
[   13.121787]  __kasan_kmalloc+0xb7/0xc0
[   13.122061]  __kmalloc_cache_noprof+0x189/0x420
[   13.122398]  kasan_strings+0xc0/0xe80
[   13.122680]  kunit_try_run_case+0x1a5/0x480
[   13.122905]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.123150]  kthread+0x337/0x6f0
[   13.123327]  ret_from_fork+0x41/0x80
[   13.123509]  ret_from_fork_asm+0x1a/0x30
[   13.124060] 
[   13.124159] Freed by task 278:
[   13.124317]  kasan_save_stack+0x45/0x70
[   13.124679]  kasan_save_track+0x18/0x40
[   13.124948]  kasan_save_free_info+0x3f/0x60
[   13.125241]  __kasan_slab_free+0x56/0x70
[   13.125519]  kfree+0x222/0x3f0
[   13.125853]  kasan_strings+0x2aa/0xe80
[   13.126158]  kunit_try_run_case+0x1a5/0x480
[   13.126485]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.126888]  kthread+0x337/0x6f0
[   13.127249]  ret_from_fork+0x41/0x80
[   13.127436]  ret_from_fork_asm+0x1a/0x30
[   13.127592] 
[   13.127717] The buggy address belongs to the object at ffff88810314dfc0
[   13.127717]  which belongs to the cache kmalloc-32 of size 32
[   13.128549] The buggy address is located 16 bytes inside of
[   13.128549]  freed 32-byte region [ffff88810314dfc0, ffff88810314dfe0)
[   13.129205] 
[   13.129300] The buggy address belongs to the physical page:
[   13.129814] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10314d
[   13.130270] flags: 0x200000000000000(node=0|zone=2)
[   13.130590] page_type: f5(slab)
[   13.130902] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   13.131346] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000
[   13.131801] page dumped because: kasan: bad access detected
[   13.132157] 
[   13.132386] Memory state around the buggy address:
[   13.132689]  ffff88810314de80: 00 00 00 fc fc fc fc fc 00 00 00 04 fc fc fc fc
[   13.133044]  ffff88810314df00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   13.133460] >ffff88810314df80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   13.133931]                                                  ^
[   13.134195]  ffff88810314e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   13.134594]  ffff88810314e080: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb
[   13.134985] ==================================================================