[   25.295498] ==================================================================
[   25.297346] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d8/0x560
[   25.298651] Read of size 8 at addr ffff888102956940 by task kunit_try_catch/207
[   25.299968] 
[   25.300421] CPU: 0 UID: 0 PID: 207 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc2-next-20241209 #1
[   25.301129] Tainted: [B]=BAD_PAGE, [N]=TEST
[   25.301875] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   25.303340] Call Trace:
[   25.303557]  <TASK>
[   25.304072]  dump_stack_lvl+0x73/0xb0
[   25.304889]  print_report+0xd1/0x640
[   25.305083]  ? __virt_addr_valid+0x1db/0x2d0
[   25.305319]  ? kasan_complete_mode_report_info+0x64/0x200
[   25.305671]  kasan_report+0x102/0x140
[   25.306166]  ? workqueue_uaf+0x4d8/0x560
[   25.306872]  ? workqueue_uaf+0x4d8/0x560
[   25.307248]  __asan_report_load8_noabort+0x18/0x20
[   25.307596]  workqueue_uaf+0x4d8/0x560
[   25.307939]  ? __pfx_workqueue_uaf+0x10/0x10
[   25.308528]  ? __schedule+0xc70/0x27e0
[   25.309422]  ? __pfx_read_tsc+0x10/0x10
[   25.310043]  ? ktime_get_ts64+0x86/0x230
[   25.310609]  kunit_try_run_case+0x1b3/0x490
[   25.311458]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.312354]  ? _raw_spin_lock_irqsave+0xa2/0x110
[   25.313195]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   25.314073]  ? __kthread_parkme+0x82/0x160
[   25.314733]  ? preempt_count_sub+0x50/0x80
[   25.315246]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.315896]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   25.316182]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.317365]  kthread+0x257/0x310
[   25.317710]  ? __pfx_kthread+0x10/0x10
[   25.318504]  ret_from_fork+0x41/0x80
[   25.318974]  ? __pfx_kthread+0x10/0x10
[   25.319584]  ret_from_fork_asm+0x1a/0x30
[   25.319871]  </TASK>
[   25.320205] 
[   25.320486] Allocated by task 207:
[   25.320922]  kasan_save_stack+0x3d/0x60
[   25.321358]  kasan_save_track+0x18/0x40
[   25.321707]  kasan_save_alloc_info+0x3b/0x50
[   25.322135]  __kasan_kmalloc+0xb7/0xc0
[   25.323139]  __kmalloc_cache_noprof+0x184/0x410
[   25.323966]  workqueue_uaf+0x153/0x560
[   25.325242]  kunit_try_run_case+0x1b3/0x490
[   25.325836]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.326882]  kthread+0x257/0x310
[   25.327409]  ret_from_fork+0x41/0x80
[   25.327711]  ret_from_fork_asm+0x1a/0x30
[   25.328253] 
[   25.328510] Freed by task 8:
[   25.328748]  kasan_save_stack+0x3d/0x60
[   25.329535]  kasan_save_track+0x18/0x40
[   25.330037]  kasan_save_free_info+0x3f/0x60
[   25.330921]  __kasan_slab_free+0x56/0x70
[   25.331130]  kfree+0x123/0x3f0
[   25.331627]  workqueue_uaf_work+0x12/0x20
[   25.332286]  process_one_work+0x5ee/0xf60
[   25.332738]  worker_thread+0x720/0x1300
[   25.333150]  kthread+0x257/0x310
[   25.333737]  ret_from_fork+0x41/0x80
[   25.334073]  ret_from_fork_asm+0x1a/0x30
[   25.335049] 
[   25.335374] Last potentially related work creation:
[   25.335997]  kasan_save_stack+0x3d/0x60
[   25.336756]  kasan_record_aux_stack+0xb2/0xc0
[   25.337509]  __queue_work+0x626/0xe60
[   25.338018]  queue_work_on+0x74/0xa0
[   25.339265]  workqueue_uaf+0x26e/0x560
[   25.339726]  kunit_try_run_case+0x1b3/0x490
[   25.340141]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.340780]  kthread+0x257/0x310
[   25.341340]  ret_from_fork+0x41/0x80
[   25.341744]  ret_from_fork_asm+0x1a/0x30
[   25.342829] 
[   25.343103] The buggy address belongs to the object at ffff888102956940
[   25.343103]  which belongs to the cache kmalloc-32 of size 32
[   25.344546] The buggy address is located 0 bytes inside of
[   25.344546]  freed 32-byte region [ffff888102956940, ffff888102956960)
[   25.345974] 
[   25.346819] The buggy address belongs to the physical page:
[   25.347278] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102956
[   25.348021] flags: 0x200000000000000(node=0|zone=2)
[   25.348580] page_type: f5(slab)
[   25.349053] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   25.349730] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   25.350390] page dumped because: kasan: bad access detected
[   25.350848] 
[   25.351059] Memory state around the buggy address:
[   25.351913]  ffff888102956800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   25.352665]  ffff888102956880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   25.353507] >ffff888102956900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   25.354107]                                            ^
[   25.354737]  ffff888102956980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.355918]  ffff888102956a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.356504] ==================================================================