[   11.263367] ==================================================================
[   11.263827] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360
[   11.264433] Write of size 33 at addr ffff888102822880 by task kunit_try_catch/204
[   11.264740] 
[   11.264840] CPU: 0 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G    B            N  6.15.0-rc7-next-20250526 #1 PREEMPT(voluntary) 
[   11.264885] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.264897] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.264918] Call Trace:
[   11.264929]  <TASK>
[   11.264945]  dump_stack_lvl+0x73/0xb0
[   11.264973]  print_report+0xd1/0x650
[   11.264995]  ? __virt_addr_valid+0x1db/0x2d0
[   11.265078]  ? kmalloc_uaf_memset+0x1a3/0x360
[   11.265100]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.265122]  ? kmalloc_uaf_memset+0x1a3/0x360
[   11.265144]  kasan_report+0x141/0x180
[   11.265166]  ? kmalloc_uaf_memset+0x1a3/0x360
[   11.265192]  kasan_check_range+0x10c/0x1c0
[   11.265216]  __asan_memset+0x27/0x50
[   11.265235]  kmalloc_uaf_memset+0x1a3/0x360
[   11.265256]  ? __pfx_kmalloc_uaf_memset+0x10/0x10
[   11.265278]  ? sysvec_apic_timer_interrupt+0x50/0x90
[   11.265304]  ? trace_hardirqs_on+0x37/0xe0
[   11.265329]  ? __pfx_read_tsc+0x10/0x10
[   11.265349]  ? ktime_get_ts64+0x86/0x230
[   11.265374]  kunit_try_run_case+0x1a5/0x480
[   11.265409]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.265430]  ? queued_spin_lock_slowpath+0x116/0xb40
[   11.265455]  ? __kthread_parkme+0x82/0x180
[   11.265476]  ? preempt_count_sub+0x50/0x80
[   11.265498]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.265519]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.265543]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.265567]  kthread+0x337/0x6f0
[   11.265586]  ? trace_preempt_on+0x20/0xc0
[   11.265607]  ? __pfx_kthread+0x10/0x10
[   11.265628]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.265651]  ? calculate_sigpending+0x7b/0xa0
[   11.265675]  ? __pfx_kthread+0x10/0x10
[   11.265696]  ret_from_fork+0x116/0x1d0
[   11.265713]  ? __pfx_kthread+0x10/0x10
[   11.265733]  ret_from_fork_asm+0x1a/0x30
[   11.265764]  </TASK>
[   11.265774] 
[   11.273651] Allocated by task 204:
[   11.273824]  kasan_save_stack+0x45/0x70
[   11.273973]  kasan_save_track+0x18/0x40
[   11.274115]  kasan_save_alloc_info+0x3b/0x50
[   11.274367]  __kasan_kmalloc+0xb7/0xc0
[   11.274580]  __kmalloc_cache_noprof+0x189/0x420
[   11.274802]  kmalloc_uaf_memset+0xa9/0x360
[   11.275005]  kunit_try_run_case+0x1a5/0x480
[   11.275212]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.275401]  kthread+0x337/0x6f0
[   11.275523]  ret_from_fork+0x116/0x1d0
[   11.275984]  ret_from_fork_asm+0x1a/0x30
[   11.276263] 
[   11.276357] Freed by task 204:
[   11.276502]  kasan_save_stack+0x45/0x70
[   11.276699]  kasan_save_track+0x18/0x40
[   11.276876]  kasan_save_free_info+0x3f/0x60
[   11.277153]  __kasan_slab_free+0x56/0x70
[   11.277327]  kfree+0x222/0x3f0
[   11.277485]  kmalloc_uaf_memset+0x12b/0x360
[   11.277699]  kunit_try_run_case+0x1a5/0x480
[   11.277887]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.278191]  kthread+0x337/0x6f0
[   11.278353]  ret_from_fork+0x116/0x1d0
[   11.278497]  ret_from_fork_asm+0x1a/0x30
[   11.278637] 
[   11.278707] The buggy address belongs to the object at ffff888102822880
[   11.278707]  which belongs to the cache kmalloc-64 of size 64
[   11.279580] The buggy address is located 0 bytes inside of
[   11.279580]  freed 64-byte region [ffff888102822880, ffff8881028228c0)
[   11.280284] 
[   11.280363] The buggy address belongs to the physical page:
[   11.280642] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102822
[   11.281133] flags: 0x200000000000000(node=0|zone=2)
[   11.281351] page_type: f5(slab)
[   11.281504] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   11.281927] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   11.282217] page dumped because: kasan: bad access detected
[   11.282443] 
[   11.282542] Memory state around the buggy address:
[   11.282830]  ffff888102822780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.283406]  ffff888102822800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.283658] >ffff888102822880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.283911]                    ^
[   11.284078]  ffff888102822900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.284592]  ffff888102822980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.284869] ==================================================================