Hay
Date
July 8, 2025, 11:09 p.m.

Environment
qemu-arm64
qemu-x86_64

[   19.019047] ==================================================================
[   19.019124] BUG: KASAN: slab-out-of-bounds in kmalloc_oob_left+0x2ec/0x320
[   19.019240] Read of size 1 at addr fff00000c58c2a9f by task kunit_try_catch/138
[   19.019309] 
[   19.019351] CPU: 1 UID: 0 PID: 138 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT 
[   19.019430] Tainted: [B]=BAD_PAGE, [N]=TEST
[   19.019466] Hardware name: linux,dummy-virt (DT)
[   19.019497] Call trace:
[   19.019519]  show_stack+0x20/0x38 (C)
[   19.019566]  dump_stack_lvl+0x8c/0xd0
[   19.019612]  print_report+0x118/0x608
[   19.019656]  kasan_report+0xdc/0x128
[   19.019700]  __asan_report_load1_noabort+0x20/0x30
[   19.019750]  kmalloc_oob_left+0x2ec/0x320
[   19.019794]  kunit_try_run_case+0x170/0x3f0
[   19.019840]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   19.019891]  kthread+0x328/0x630
[   19.019932]  ret_from_fork+0x10/0x20
[   19.019980] 
[   19.019998] Allocated by task 24:
[   19.020027]  kasan_save_stack+0x3c/0x68
[   19.020066]  kasan_save_track+0x20/0x40
[   19.020103]  kasan_save_alloc_info+0x40/0x58
[   19.020142]  __kasan_kmalloc+0xd4/0xd8
[   19.020187]  __kmalloc_node_track_caller_noprof+0x194/0x4b8
[   19.020460]  kvasprintf+0xe0/0x180
[   19.020824]  __kthread_create_on_node+0x16c/0x350
[   19.020934]  kthread_create_on_node+0xe4/0x130
[   19.021197]  create_worker+0x380/0x6b8
[   19.021238]  worker_thread+0x808/0xf38
[   19.021273]  kthread+0x328/0x630
[   19.021337]  ret_from_fork+0x10/0x20
[   19.021676] 
[   19.021736] The buggy address belongs to the object at fff00000c58c2a80
[   19.021736]  which belongs to the cache kmalloc-16 of size 16
[   19.021971] The buggy address is located 19 bytes to the right of
[   19.021971]  allocated 12-byte region [fff00000c58c2a80, fff00000c58c2a8c)
[   19.022241] 
[   19.022319] The buggy address belongs to the physical page:
[   19.022444] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058c2
[   19.022537] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   19.022585] page_type: f5(slab)
[   19.022624] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000
[   19.022999] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   19.023147] page dumped because: kasan: bad access detected
[   19.023211] 
[   19.023228] Memory state around the buggy address:
[   19.023262]  fff00000c58c2980: fa fb fc fc 00 02 fc fc fa fb fc fc fa fb fc fc
[   19.023321]  fff00000c58c2a00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   19.023655] >fff00000c58c2a80: 00 04 fc fc 00 07 fc fc fc fc fc fc fc fc fc fc
[   19.023809]                             ^
[   19.023947]  fff00000c58c2b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   19.024027]  fff00000c58c2b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   19.024072] ==================================================================

[   11.826069] ==================================================================
[   11.827042] BUG: KASAN: slab-out-of-bounds in kmalloc_oob_left+0x361/0x3c0
[   11.827969] Read of size 1 at addr ffff88810233af1f by task kunit_try_catch/156
[   11.828451] 
[   11.828862] CPU: 0 UID: 0 PID: 156 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT(voluntary) 
[   11.828969] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.828982] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.829003] Call Trace:
[   11.829017]  <TASK>
[   11.829034]  dump_stack_lvl+0x73/0xb0
[   11.829069]  print_report+0xd1/0x650
[   11.829091]  ? __virt_addr_valid+0x1db/0x2d0
[   11.829115]  ? kmalloc_oob_left+0x361/0x3c0
[   11.829136]  ? kasan_complete_mode_report_info+0x2a/0x200
[   11.829158]  ? kmalloc_oob_left+0x361/0x3c0
[   11.829179]  kasan_report+0x141/0x180
[   11.829200]  ? kmalloc_oob_left+0x361/0x3c0
[   11.829226]  __asan_report_load1_noabort+0x18/0x20
[   11.829250]  kmalloc_oob_left+0x361/0x3c0
[   11.829271]  ? __pfx_kmalloc_oob_left+0x10/0x10
[   11.829293]  ? __schedule+0x10cc/0x2b60
[   11.829314]  ? __pfx_read_tsc+0x10/0x10
[   11.829335]  ? ktime_get_ts64+0x86/0x230
[   11.829359]  kunit_try_run_case+0x1a5/0x480
[   11.829384]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.829406]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.829429]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.829452]  ? __kthread_parkme+0x82/0x180
[   11.829472]  ? preempt_count_sub+0x50/0x80
[   11.829515]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.829539]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.829563]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.829588]  kthread+0x337/0x6f0
[   11.829617]  ? trace_preempt_on+0x20/0xc0
[   11.829639]  ? __pfx_kthread+0x10/0x10
[   11.829659]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.829681]  ? calculate_sigpending+0x7b/0xa0
[   11.829710]  ? __pfx_kthread+0x10/0x10
[   11.829731]  ret_from_fork+0x116/0x1d0
[   11.829749]  ? __pfx_kthread+0x10/0x10
[   11.829769]  ret_from_fork_asm+0x1a/0x30
[   11.829801]  </TASK>
[   11.829812] 
[   11.844631] Allocated by task 1:
[   11.844766]  kasan_save_stack+0x45/0x70
[   11.845181]  kasan_save_track+0x18/0x40
[   11.845529]  kasan_save_alloc_info+0x3b/0x50
[   11.846039]  __kasan_kmalloc+0xb7/0xc0
[   11.846415]  __kmalloc_node_track_caller_noprof+0x1cb/0x500
[   11.847060]  kvasprintf+0xc5/0x150
[   11.847421]  __kthread_create_on_node+0x18b/0x3a0
[   11.847879]  kthread_create_on_node+0xab/0xe0
[   11.848322]  create_worker+0x3e5/0x7b0
[   11.848742]  alloc_unbound_pwq+0x8ea/0xdb0
[   11.849234]  apply_wqattrs_prepare+0x332/0xd20
[   11.849741]  apply_workqueue_attrs_locked+0x4d/0xa0
[   11.850039]  alloc_workqueue+0xcc7/0x1ad0
[   11.850176]  latency_fsnotify_init+0x1b/0x50
[   11.850320]  do_one_initcall+0xd8/0x370
[   11.851007]  kernel_init_freeable+0x420/0x6f0
[   11.851510]  kernel_init+0x23/0x1e0
[   11.851955]  ret_from_fork+0x116/0x1d0
[   11.852095]  ret_from_fork_asm+0x1a/0x30
[   11.852665] 
[   11.853007] The buggy address belongs to the object at ffff88810233af00
[   11.853007]  which belongs to the cache kmalloc-16 of size 16
[   11.854269] The buggy address is located 18 bytes to the right of
[   11.854269]  allocated 13-byte region [ffff88810233af00, ffff88810233af0d)
[   11.855116] 
[   11.855336] The buggy address belongs to the physical page:
[   11.856133] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10233a
[   11.857054] flags: 0x200000000000000(node=0|zone=2)
[   11.857232] page_type: f5(slab)
[   11.857357] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   11.857868] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   11.858718] page dumped because: kasan: bad access detected
[   11.859356] 
[   11.859519] Memory state around the buggy address:
[   11.860060]  ffff88810233ae00: 00 05 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc
[   11.860273]  ffff88810233ae80: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   11.860479] >ffff88810233af00: 00 05 fc fc 00 07 fc fc fc fc fc fc fc fc fc fc
[   11.860905]                             ^
[   11.861069]  ffff88810233af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.861819]  ffff88810233b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   11.862237] ==================================================================