Hay
Date
July 8, 2025, 4:38 p.m.

Environment
qemu-arm64
qemu-x86_64

[   17.831179] ==================================================================
[   17.831241] BUG: KASAN: slab-out-of-bounds in kmalloc_oob_16+0x3a0/0x3f8
[   17.831292] Write of size 16 at addr fff00000c5cff680 by task kunit_try_catch/168
[   17.831354] 
[   17.831384] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G    B            N  6.15.6-rc1 #1 PREEMPT 
[   17.832031] Tainted: [B]=BAD_PAGE, [N]=TEST
[   17.832085] Hardware name: linux,dummy-virt (DT)
[   17.832319] Call trace:
[   17.832595]  show_stack+0x20/0x38 (C)
[   17.833016]  dump_stack_lvl+0x8c/0xd0
[   17.833114]  print_report+0x118/0x608
[   17.833160]  kasan_report+0xdc/0x128
[   17.833314]  __asan_report_store16_noabort+0x20/0x30
[   17.833385]  kmalloc_oob_16+0x3a0/0x3f8
[   17.833634]  kunit_try_run_case+0x170/0x3f0
[   17.833707]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   17.833850]  kthread+0x328/0x630
[   17.833927]  ret_from_fork+0x10/0x20
[   17.834005] 
[   17.834025] Allocated by task 168:
[   17.834069]  kasan_save_stack+0x3c/0x68
[   17.834109]  kasan_save_track+0x20/0x40
[   17.834144]  kasan_save_alloc_info+0x40/0x58
[   17.834181]  __kasan_kmalloc+0xd4/0xd8
[   17.834215]  __kmalloc_cache_noprof+0x16c/0x3c0
[   17.834635]  kmalloc_oob_16+0xb4/0x3f8
[   17.834693]  kunit_try_run_case+0x170/0x3f0
[   17.835000]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   17.835056]  kthread+0x328/0x630
[   17.835129]  ret_from_fork+0x10/0x20
[   17.835165] 
[   17.835185] The buggy address belongs to the object at fff00000c5cff680
[   17.835185]  which belongs to the cache kmalloc-16 of size 16
[   17.835240] The buggy address is located 0 bytes inside of
[   17.835240]  allocated 13-byte region [fff00000c5cff680, fff00000c5cff68d)
[   17.835310] 
[   17.835418] The buggy address belongs to the physical page:
[   17.835448] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105cff
[   17.835499] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   17.835547] page_type: f5(slab)
[   17.835671] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000
[   17.835940] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   17.836168] page dumped because: kasan: bad access detected
[   17.836309] 
[   17.836329] Memory state around the buggy address:
[   17.836400]  fff00000c5cff580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   17.836442]  fff00000c5cff600: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   17.836483] >fff00000c5cff680: 00 05 fc fc 00 00 fc fc fc fc fc fc fc fc fc fc
[   17.836665]                       ^
[   17.836702]  fff00000c5cff700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.836818]  fff00000c5cff780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.836855] ==================================================================

[   11.229007] ==================================================================
[   11.229711] BUG: KASAN: slab-out-of-bounds in kmalloc_oob_16+0x452/0x4a0
[   11.230220] Write of size 16 at addr ffff888102171580 by task kunit_try_catch/186
[   11.230962] 
[   11.231208] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G    B            N  6.15.6-rc1 #1 PREEMPT(voluntary) 
[   11.231253] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.231265] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.231288] Call Trace:
[   11.231300]  <TASK>
[   11.231316]  dump_stack_lvl+0x73/0xb0
[   11.231344]  print_report+0xd1/0x650
[   11.231367]  ? __virt_addr_valid+0x1db/0x2d0
[   11.231388]  ? kmalloc_oob_16+0x452/0x4a0
[   11.231409]  ? kasan_complete_mode_report_info+0x2a/0x200
[   11.231432]  ? kmalloc_oob_16+0x452/0x4a0
[   11.231454]  kasan_report+0x141/0x180
[   11.231476]  ? kmalloc_oob_16+0x452/0x4a0
[   11.231502]  __asan_report_store16_noabort+0x1b/0x30
[   11.231537]  kmalloc_oob_16+0x452/0x4a0
[   11.231559]  ? __pfx_kmalloc_oob_16+0x10/0x10
[   11.231590]  ? __schedule+0x10cc/0x2b60
[   11.231613]  ? __pfx_read_tsc+0x10/0x10
[   11.231633]  ? ktime_get_ts64+0x86/0x230
[   11.231659]  kunit_try_run_case+0x1a5/0x480
[   11.231680]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.231699]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.231723]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.231746]  ? __kthread_parkme+0x82/0x180
[   11.231768]  ? preempt_count_sub+0x50/0x80
[   11.231794]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.231814]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.231837]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.231860]  kthread+0x337/0x6f0
[   11.231887]  ? trace_preempt_on+0x20/0xc0
[   11.231910]  ? __pfx_kthread+0x10/0x10
[   11.231928]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.231950]  ? calculate_sigpending+0x7b/0xa0
[   11.231971]  ? __pfx_kthread+0x10/0x10
[   11.231989]  ret_from_fork+0x41/0x80
[   11.232010]  ? __pfx_kthread+0x10/0x10
[   11.232028]  ret_from_fork_asm+0x1a/0x30
[   11.232071]  </TASK>
[   11.232082] 
[   11.245673] Allocated by task 186:
[   11.245812]  kasan_save_stack+0x45/0x70
[   11.246250]  kasan_save_track+0x18/0x40
[   11.246607]  kasan_save_alloc_info+0x3b/0x50
[   11.247198]  __kasan_kmalloc+0xb7/0xc0
[   11.247647]  __kmalloc_cache_noprof+0x189/0x420
[   11.248192]  kmalloc_oob_16+0xa8/0x4a0
[   11.248603]  kunit_try_run_case+0x1a5/0x480
[   11.248849]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.249042]  kthread+0x337/0x6f0
[   11.249164]  ret_from_fork+0x41/0x80
[   11.249296]  ret_from_fork_asm+0x1a/0x30
[   11.249440] 
[   11.249658] The buggy address belongs to the object at ffff888102171580
[   11.249658]  which belongs to the cache kmalloc-16 of size 16
[   11.250914] The buggy address is located 0 bytes inside of
[   11.250914]  allocated 13-byte region [ffff888102171580, ffff88810217158d)
[   11.252179] 
[   11.252446] The buggy address belongs to the physical page:
[   11.253059] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102171
[   11.253778] flags: 0x200000000000000(node=0|zone=2)
[   11.254433] page_type: f5(slab)
[   11.254907] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   11.255157] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   11.255385] page dumped because: kasan: bad access detected
[   11.255608] 
[   11.255680] Memory state around the buggy address:
[   11.256072]  ffff888102171480: 00 02 fc fc 00 02 fc fc 00 02 fc fc 00 02 fc fc
[   11.256734]  ffff888102171500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   11.257418] >ffff888102171580: 00 05 fc fc 00 00 fc fc fc fc fc fc fc fc fc fc
[   11.258205]                       ^
[   11.258525]  ffff888102171600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.259155]  ffff888102171680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.259650] ==================================================================