Hay
Date
July 15, 2025, 2:09 p.m.

Environment
qemu-x86_64

[   14.835347] ==================================================================
[   14.836614] BUG: KASAN: slab-out-of-bounds in _copy_from_user+0x32/0x90
[   14.837554] Write of size 121 at addr ffff888103a34500 by task kunit_try_catch/304
[   14.838180] 
[   14.838574] CPU: 1 UID: 0 PID: 304 Comm: kunit_try_catch Tainted: G    B            N  6.15.7-rc1 #1 PREEMPT(voluntary) 
[   14.838630] Tainted: [B]=BAD_PAGE, [N]=TEST
[   14.838643] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   14.838666] Call Trace:
[   14.838733]  <TASK>
[   14.838752]  dump_stack_lvl+0x73/0xb0
[   14.838782]  print_report+0xd1/0x610
[   14.838825]  ? __virt_addr_valid+0x1db/0x2d0
[   14.838848]  ? _copy_from_user+0x32/0x90
[   14.838869]  ? kasan_complete_mode_report_info+0x2a/0x200
[   14.838905]  ? _copy_from_user+0x32/0x90
[   14.838925]  kasan_report+0x141/0x180
[   14.838948]  ? _copy_from_user+0x32/0x90
[   14.838973]  kasan_check_range+0x10c/0x1c0
[   14.838993]  __kasan_check_write+0x18/0x20
[   14.839013]  _copy_from_user+0x32/0x90
[   14.839035]  copy_user_test_oob+0x2be/0x10f0
[   14.839057]  ? __pfx_copy_user_test_oob+0x10/0x10
[   14.839076]  ? sysvec_apic_timer_interrupt+0x50/0x90
[   14.839103]  ? __pfx_copy_user_test_oob+0x10/0x10
[   14.839128]  kunit_try_run_case+0x1a5/0x480
[   14.839148]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.839167]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   14.839192]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   14.839217]  ? __kthread_parkme+0x82/0x180
[   14.839239]  ? preempt_count_sub+0x50/0x80
[   14.839265]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.839286]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.839309]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   14.839333]  kthread+0x337/0x6f0
[   14.839350]  ? trace_preempt_on+0x20/0xc0
[   14.839375]  ? __pfx_kthread+0x10/0x10
[   14.839393]  ? _raw_spin_unlock_irq+0x47/0x80
[   14.839416]  ? calculate_sigpending+0x7b/0xa0
[   14.839438]  ? __pfx_kthread+0x10/0x10
[   14.839456]  ret_from_fork+0x41/0x80
[   14.839478]  ? __pfx_kthread+0x10/0x10
[   14.839497]  ret_from_fork_asm+0x1a/0x30
[   14.839528]  </TASK>
[   14.839541] 
[   14.852204] Allocated by task 304:
[   14.852528]  kasan_save_stack+0x45/0x70
[   14.852699]  kasan_save_track+0x18/0x40
[   14.852837]  kasan_save_alloc_info+0x3b/0x50
[   14.853168]  __kasan_kmalloc+0xb7/0xc0
[   14.853564]  __kmalloc_noprof+0x1c9/0x500
[   14.854007]  kunit_kmalloc_array+0x25/0x60
[   14.854358]  copy_user_test_oob+0xab/0x10f0
[   14.854570]  kunit_try_run_case+0x1a5/0x480
[   14.854712]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.854950]  kthread+0x337/0x6f0
[   14.855081]  ret_from_fork+0x41/0x80
[   14.855211]  ret_from_fork_asm+0x1a/0x30
[   14.855346] 
[   14.855419] The buggy address belongs to the object at ffff888103a34500
[   14.855419]  which belongs to the cache kmalloc-128 of size 128
[   14.855857] The buggy address is located 0 bytes inside of
[   14.855857]  allocated 120-byte region [ffff888103a34500, ffff888103a34578)
[   14.856309] 
[   14.856456] The buggy address belongs to the physical page:
[   14.856703] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103a34
[   14.857037] flags: 0x200000000000000(node=0|zone=2)
[   14.857559] page_type: f5(slab)
[   14.857711] raw: 0200000000000000 ffff888100041a00 dead000000000122 0000000000000000
[   14.858281] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
[   14.858581] page dumped because: kasan: bad access detected
[   14.859147] 
[   14.859246] Memory state around the buggy address:
[   14.859459]  ffff888103a34400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   14.859949]  ffff888103a34480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   14.860261] >ffff888103a34500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc
[   14.860664]                                                                 ^
[   14.861148]  ffff888103a34580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   14.861445]  ffff888103a34600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   14.861739] ==================================================================