Hay
Date
July 12, 2025, 11:09 p.m.

Environment
qemu-x86_64

[   16.811629] ==================================================================
[   16.812484] BUG: KASAN: slab-out-of-bounds in _copy_from_user+0x32/0x90
[   16.812719] Write of size 121 at addr ffff888103a67500 by task kunit_try_catch/302
[   16.812958] 
[   16.813054] CPU: 0 UID: 0 PID: 302 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT(voluntary) 
[   16.813101] Tainted: [B]=BAD_PAGE, [N]=TEST
[   16.813114] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   16.813138] Call Trace:
[   16.813151]  <TASK>
[   16.813171]  dump_stack_lvl+0x73/0xb0
[   16.813203]  print_report+0xd1/0x610
[   16.813228]  ? __virt_addr_valid+0x1db/0x2d0
[   16.813254]  ? _copy_from_user+0x32/0x90
[   16.813286]  ? kasan_complete_mode_report_info+0x2a/0x200
[   16.813311]  ? _copy_from_user+0x32/0x90
[   16.813333]  kasan_report+0x141/0x180
[   16.813356]  ? _copy_from_user+0x32/0x90
[   16.813381]  kasan_check_range+0x10c/0x1c0
[   16.813406]  __kasan_check_write+0x18/0x20
[   16.813427]  _copy_from_user+0x32/0x90
[   16.813450]  copy_user_test_oob+0x2be/0x10f0
[   16.813518]  ? __pfx_copy_user_test_oob+0x10/0x10
[   16.813544]  ? sysvec_apic_timer_interrupt+0x50/0x90
[   16.813589]  ? __pfx_copy_user_test_oob+0x10/0x10
[   16.813619]  kunit_try_run_case+0x1a5/0x480
[   16.813644]  ? __pfx_kunit_try_run_case+0x10/0x10
[   16.813669]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   16.813718]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   16.813755]  ? __kthread_parkme+0x82/0x180
[   16.813789]  ? preempt_count_sub+0x50/0x80
[   16.813816]  ? __pfx_kunit_try_run_case+0x10/0x10
[   16.813842]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   16.813870]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   16.813898]  kthread+0x337/0x6f0
[   16.813918]  ? trace_preempt_on+0x20/0xc0
[   16.813964]  ? __pfx_kthread+0x10/0x10
[   16.813987]  ? _raw_spin_unlock_irq+0x47/0x80
[   16.814021]  ? calculate_sigpending+0x7b/0xa0
[   16.814059]  ? __pfx_kthread+0x10/0x10
[   16.814082]  ret_from_fork+0x116/0x1d0
[   16.814103]  ? __pfx_kthread+0x10/0x10
[   16.814125]  ret_from_fork_asm+0x1a/0x30
[   16.814158]  </TASK>
[   16.814170] 
[   16.820922] Allocated by task 302:
[   16.821050]  kasan_save_stack+0x45/0x70
[   16.821250]  kasan_save_track+0x18/0x40
[   16.821455]  kasan_save_alloc_info+0x3b/0x50
[   16.821668]  __kasan_kmalloc+0xb7/0xc0
[   16.821849]  __kmalloc_noprof+0x1c9/0x500
[   16.822046]  kunit_kmalloc_array+0x25/0x60
[   16.822196]  copy_user_test_oob+0xab/0x10f0
[   16.822423]  kunit_try_run_case+0x1a5/0x480
[   16.822594]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   16.822812]  kthread+0x337/0x6f0
[   16.822931]  ret_from_fork+0x116/0x1d0
[   16.823061]  ret_from_fork_asm+0x1a/0x30
[   16.823255] 
[   16.823359] The buggy address belongs to the object at ffff888103a67500
[   16.823359]  which belongs to the cache kmalloc-128 of size 128
[   16.823894] The buggy address is located 0 bytes inside of
[   16.823894]  allocated 120-byte region [ffff888103a67500, ffff888103a67578)
[   16.824406] 
[   16.824524] The buggy address belongs to the physical page:
[   16.824755] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103a67
[   16.825086] flags: 0x200000000000000(node=0|zone=2)
[   16.825302] page_type: f5(slab)
[   16.825485] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000
[   16.825744] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
[   16.825966] page dumped because: kasan: bad access detected
[   16.826167] 
[   16.826279] Memory state around the buggy address:
[   16.826501]  ffff888103a67400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   16.826821]  ffff888103a67480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   16.827135] >ffff888103a67500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc
[   16.827421]                                                                 ^
[   16.827689]  ffff888103a67580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   16.827900]  ffff888103a67600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   16.828155] ==================================================================