[   50.102614] ==================================================================
[   50.104495] BUG: KASAN: slab-out-of-bounds in memchr+0x27/0x60
[   50.105794] Read of size 1 at addr ffff8881028ced18 by task kunit_try_catch/218
[   50.106720] 
[   50.107071] CPU: 1 PID: 218 Comm: kunit_try_catch Tainted: G    B            N 6.6.76-rc1 #1
[   50.108105] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   50.109286] Call Trace:
[   50.109763]  <TASK>
[   50.110219]  dump_stack_lvl+0x4e/0x90
[   50.111397]  print_report+0xd2/0x660
[   50.112358]  ? __virt_addr_valid+0x156/0x1e0
[   50.113055]  ? kasan_complete_mode_report_info+0x2a/0x200
[   50.113834]  kasan_report+0xff/0x140
[   50.114496]  ? memchr+0x27/0x60
[   50.115056]  ? memchr+0x27/0x60
[   50.115576]  __asan_load1+0x66/0x70
[   50.116209]  memchr+0x27/0x60
[   50.116807]  kasan_memchr+0xdd/0x1f0
[   50.117451]  ? __pfx_kasan_memchr+0x10/0x10
[   50.118057]  ? __schedule+0x70b/0x1190
[   50.118818]  ? ktime_get_ts64+0x118/0x140
[   50.119438]  kunit_try_run_case+0x126/0x290
[   50.120002]  ? __pfx_kunit_try_run_case+0x10/0x10
[   50.120552]  ? __kasan_check_write+0x18/0x20
[   50.121892]  ? trace_preempt_on+0x20/0xa0
[   50.122583]  ? __kthread_parkme+0x4f/0xd0
[   50.123476]  ? preempt_count_sub+0x50/0x80
[   50.124192]  ? __pfx_kunit_try_run_case+0x10/0x10
[   50.124824]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   50.125510]  kunit_generic_run_threadfn_adapter+0x33/0x50
[   50.126158]  kthread+0x19e/0x1e0
[   50.126693]  ? __pfx_kthread+0x10/0x10
[   50.127335]  ret_from_fork+0x41/0x70
[   50.127936]  ? __pfx_kthread+0x10/0x10
[   50.128647]  ret_from_fork_asm+0x1b/0x30
[   50.129496]  </TASK>
[   50.130008] 
[   50.130487] Allocated by task 218:
[   50.130953]  kasan_save_stack+0x3c/0x60
[   50.131876]  kasan_set_track+0x29/0x40
[   50.132811]  kasan_save_alloc_info+0x22/0x30
[   50.133294]  __kasan_kmalloc+0xb7/0xc0
[   50.133841]  kmalloc_trace+0x4c/0xb0
[   50.134702]  kasan_memchr+0x9f/0x1f0
[   50.135464]  kunit_try_run_case+0x126/0x290
[   50.136372]  kunit_generic_run_threadfn_adapter+0x33/0x50
[   50.137066]  kthread+0x19e/0x1e0
[   50.138013]  ret_from_fork+0x41/0x70
[   50.138720]  ret_from_fork_asm+0x1b/0x30
[   50.139415] 
[   50.139678] The buggy address belongs to the object at ffff8881028ced00
[   50.139678]  which belongs to the cache kmalloc-32 of size 32
[   50.140706] The buggy address is located 0 bytes to the right of
[   50.140706]  allocated 24-byte region [ffff8881028ced00, ffff8881028ced18)
[   50.141914] 
[   50.142265] The buggy address belongs to the physical page:
[   50.143022] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1028ce
[   50.144562] flags: 0x200000000000800(slab|node=0|zone=2)
[   50.145492] page_type: 0xffffffff()
[   50.146202] raw: 0200000000000800 ffff888100041500 dead000000000122 0000000000000000
[   50.147200] raw: 0000000000000000 0000000080400040 00000001ffffffff 0000000000000000
[   50.148247] page dumped because: kasan: bad access detected
[   50.148831] 
[   50.149669] Memory state around the buggy address:
[   50.150818]  ffff8881028cec00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   50.151496]  ffff8881028cec80: 00 00 07 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   50.152497] >ffff8881028ced00: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
[   50.153244]                             ^
[   50.153924]  ffff8881028ced80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   50.155223]  ffff8881028cee00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   50.155893] ==================================================================