Hay
Date
July 5, 2025, 5:09 p.m.

Environment
qemu-arm64
qemu-x86_64

[   18.405444] ==================================================================
[   18.405502] BUG: KASAN: slab-out-of-bounds in kmalloc_memmove_invalid_size+0x154/0x2e0
[   18.405551] Read of size 64 at addr fff00000c7818604 by task kunit_try_catch/182
[   18.405601] 
[   18.405630] CPU: 1 UID: 0 PID: 182 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc4 #1 PREEMPT 
[   18.405710] Tainted: [B]=BAD_PAGE, [N]=TEST
[   18.405736] Hardware name: linux,dummy-virt (DT)
[   18.405766] Call trace:
[   18.405787]  show_stack+0x20/0x38 (C)
[   18.405832]  dump_stack_lvl+0x8c/0xd0
[   18.405907]  print_report+0x118/0x608
[   18.406126]  kasan_report+0xdc/0x128
[   18.406172]  kasan_check_range+0x100/0x1a8
[   18.406221]  __asan_memmove+0x3c/0x98
[   18.406263]  kmalloc_memmove_invalid_size+0x154/0x2e0
[   18.406313]  kunit_try_run_case+0x170/0x3f0
[   18.406359]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   18.406409]  kthread+0x328/0x630
[   18.406450]  ret_from_fork+0x10/0x20
[   18.406498] 
[   18.406515] Allocated by task 182:
[   18.406541]  kasan_save_stack+0x3c/0x68
[   18.406582]  kasan_save_track+0x20/0x40
[   18.406620]  kasan_save_alloc_info+0x40/0x58
[   18.406669]  __kasan_kmalloc+0xd4/0xd8
[   18.406759]  __kmalloc_cache_noprof+0x16c/0x3c0
[   18.406873]  kmalloc_memmove_invalid_size+0xb0/0x2e0
[   18.406915]  kunit_try_run_case+0x170/0x3f0
[   18.406951]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   18.406994]  kthread+0x328/0x630
[   18.407026]  ret_from_fork+0x10/0x20
[   18.407062] 
[   18.407096] The buggy address belongs to the object at fff00000c7818600
[   18.407096]  which belongs to the cache kmalloc-64 of size 64
[   18.407152] The buggy address is located 4 bytes inside of
[   18.407152]  allocated 64-byte region [fff00000c7818600, fff00000c7818640)
[   18.407224] 
[   18.407245] The buggy address belongs to the physical page:
[   18.407274] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107818
[   18.407413] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   18.407464] page_type: f5(slab)
[   18.407594] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000
[   18.407693] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   18.407777] page dumped because: kasan: bad access detected
[   18.407893] 
[   18.407910] Memory state around the buggy address:
[   18.407983]  fff00000c7818500: 00 00 00 00 00 01 fc fc fc fc fc fc fc fc fc fc
[   18.408091]  fff00000c7818580: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   18.408168] >fff00000c7818600: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
[   18.408232]                                            ^
[   18.408269]  fff00000c7818680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   18.408310]  fff00000c7818700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   18.408375] ==================================================================

[   11.817398] ==================================================================
[   11.818043] BUG: KASAN: slab-out-of-bounds in kmalloc_memmove_invalid_size+0x16f/0x330
[   11.818662] Read of size 64 at addr ffff8881031aa804 by task kunit_try_catch/200
[   11.819425] 
[   11.819601] CPU: 0 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc4 #1 PREEMPT(voluntary) 
[   11.819650] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.819663] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.819685] Call Trace:
[   11.819701]  <TASK>
[   11.819720]  dump_stack_lvl+0x73/0xb0
[   11.820206]  print_report+0xd1/0x650
[   11.820237]  ? __virt_addr_valid+0x1db/0x2d0
[   11.820261]  ? kmalloc_memmove_invalid_size+0x16f/0x330
[   11.820284]  ? kasan_complete_mode_report_info+0x2a/0x200
[   11.820305]  ? kmalloc_memmove_invalid_size+0x16f/0x330
[   11.820329]  kasan_report+0x141/0x180
[   11.820350]  ? kmalloc_memmove_invalid_size+0x16f/0x330
[   11.820378]  kasan_check_range+0x10c/0x1c0
[   11.820401]  __asan_memmove+0x27/0x70
[   11.820420]  kmalloc_memmove_invalid_size+0x16f/0x330
[   11.820444]  ? __pfx_kmalloc_memmove_invalid_size+0x10/0x10
[   11.820480]  ? __schedule+0x10cc/0x2b60
[   11.820502]  ? __pfx_read_tsc+0x10/0x10
[   11.820522]  ? ktime_get_ts64+0x86/0x230
[   11.820546]  kunit_try_run_case+0x1a5/0x480
[   11.820571]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.820592]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.820615]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.820638]  ? __kthread_parkme+0x82/0x180
[   11.820658]  ? preempt_count_sub+0x50/0x80
[   11.821195]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.821222]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.821244]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.821266]  kthread+0x337/0x6f0
[   11.821285]  ? trace_preempt_on+0x20/0xc0
[   11.821308]  ? __pfx_kthread+0x10/0x10
[   11.821328]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.821348]  ? calculate_sigpending+0x7b/0xa0
[   11.821371]  ? __pfx_kthread+0x10/0x10
[   11.821400]  ret_from_fork+0x116/0x1d0
[   11.821418]  ? __pfx_kthread+0x10/0x10
[   11.821438]  ret_from_fork_asm+0x1a/0x30
[   11.821480]  </TASK>
[   11.821492] 
[   11.836214] Allocated by task 200:
[   11.837351]  kasan_save_stack+0x45/0x70
[   11.837523]  kasan_save_track+0x18/0x40
[   11.837725]  kasan_save_alloc_info+0x3b/0x50
[   11.837964]  __kasan_kmalloc+0xb7/0xc0
[   11.838132]  __kmalloc_cache_noprof+0x189/0x420
[   11.838321]  kmalloc_memmove_invalid_size+0xac/0x330
[   11.838574]  kunit_try_run_case+0x1a5/0x480
[   11.838753]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.838966]  kthread+0x337/0x6f0
[   11.839200]  ret_from_fork+0x116/0x1d0
[   11.839337]  ret_from_fork_asm+0x1a/0x30
[   11.840846] 
[   11.840944] The buggy address belongs to the object at ffff8881031aa800
[   11.840944]  which belongs to the cache kmalloc-64 of size 64
[   11.841436] The buggy address is located 4 bytes inside of
[   11.841436]  allocated 64-byte region [ffff8881031aa800, ffff8881031aa840)
[   11.842000] 
[   11.842089] The buggy address belongs to the physical page:
[   11.842291] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1031aa
[   11.842625] flags: 0x200000000000000(node=0|zone=2)
[   11.842955] page_type: f5(slab)
[   11.843102] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   11.843415] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   11.843724] page dumped because: kasan: bad access detected
[   11.843949] 
[   11.844043] Memory state around the buggy address:
[   11.844265]  ffff8881031aa700: 00 00 00 00 00 01 fc fc fc fc fc fc fc fc fc fc
[   11.844567]  ffff8881031aa780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.844908] >ffff8881031aa800: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
[   11.845179]                                            ^
[   11.846891]  ffff8881031aa880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.847185]  ffff8881031aa900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.847526] ==================================================================