Hay
Date
July 24, 2025, 4:41 a.m.

Environment
qemu-arm64
qemu-x86_64

[   32.220845] ==================================================================
[   32.221548] BUG: KASAN: slab-out-of-bounds in kmalloc_large_oob_right+0x278/0x2b8
[   32.221785] Write of size 1 at addr fff00000c99a200a by task kunit_try_catch/177
[   32.221838] 
[   32.222053] CPU: 0 UID: 0 PID: 177 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc7-next-20250724 #1 PREEMPT 
[   32.222169] Tainted: [B]=BAD_PAGE, [N]=TEST
[   32.222435] Hardware name: linux,dummy-virt (DT)
[   32.222486] Call trace:
[   32.222560]  show_stack+0x20/0x38 (C)
[   32.222619]  dump_stack_lvl+0x8c/0xd0
[   32.222687]  print_report+0x118/0x5e8
[   32.222739]  kasan_report+0xdc/0x128
[   32.222795]  __asan_report_store1_noabort+0x20/0x30
[   32.222843]  kmalloc_large_oob_right+0x278/0x2b8
[   32.222896]  kunit_try_run_case+0x170/0x3f0
[   32.223128]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   32.223531]  kthread+0x328/0x630
[   32.223587]  ret_from_fork+0x10/0x20
[   32.223902] 
[   32.223951] The buggy address belongs to the physical page:
[   32.223994] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1099a0
[   32.224050] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   32.224119] flags: 0xbfffe0000000040(head|node=0|zone=2|lastcpupid=0x1ffff)
[   32.224192] page_type: f8(unknown)
[   32.224241] raw: 0bfffe0000000040 0000000000000000 dead000000000122 0000000000000000
[   32.224297] raw: 0000000000000000 0000000000000000 00000000f8000000 0000000000000000
[   32.224362] head: 0bfffe0000000040 0000000000000000 dead000000000122 0000000000000000
[   32.224420] head: 0000000000000000 0000000000000000 00000000f8000000 0000000000000000
[   32.224471] head: 0bfffe0000000002 ffffc1ffc3266801 00000000ffffffff 00000000ffffffff
[   32.224519] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
[   32.224568] page dumped because: kasan: bad access detected
[   32.224613] 
[   32.224632] Memory state around the buggy address:
[   32.224685]  fff00000c99a1f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   32.224741]  fff00000c99a1f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   32.224805] >fff00000c99a2000: 00 02 fe fe fe fe fe fe fe fe fe fe fe fe fe fe
[   32.225233]                       ^
[   32.225653]  fff00000c99a2080: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
[   32.225712]  fff00000c99a2100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
[   32.225773] ==================================================================

[   26.313454] ==================================================================
[   26.313929] BUG: KASAN: slab-out-of-bounds in kmalloc_large_oob_right+0x2e9/0x330
[   26.314176] Write of size 1 at addr ffff88810496e00a by task kunit_try_catch/194
[   26.314396] 
[   26.314483] CPU: 0 UID: 0 PID: 194 Comm: kunit_try_catch Tainted: G    B   W        N  6.16.0-rc7-next-20250724 #1 PREEMPT(voluntary) 
[   26.314537] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST
[   26.314551] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   26.314583] Call Trace:
[   26.314596]  <TASK>
[   26.314616]  dump_stack_lvl+0x73/0xb0
[   26.314645]  print_report+0xd1/0x640
[   26.314671]  ? __virt_addr_valid+0x1db/0x2d0
[   26.314696]  ? kmalloc_large_oob_right+0x2e9/0x330
[   26.314717]  ? kasan_addr_to_slab+0x11/0xa0
[   26.314736]  ? kmalloc_large_oob_right+0x2e9/0x330
[   26.314757]  kasan_report+0x141/0x180
[   26.314781]  ? kmalloc_large_oob_right+0x2e9/0x330
[   26.314806]  __asan_report_store1_noabort+0x1b/0x30
[   26.314829]  kmalloc_large_oob_right+0x2e9/0x330
[   26.314849]  ? __pfx_kmalloc_large_oob_right+0x10/0x10
[   26.314871]  ? __schedule+0x10da/0x2b60
[   26.314894]  ? __pfx_read_tsc+0x10/0x10
[   26.314915]  ? ktime_get_ts64+0x86/0x230
[   26.314939]  kunit_try_run_case+0x1a5/0x480
[   26.314963]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.314984]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   26.315008]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   26.315032]  ? __kthread_parkme+0x82/0x180
[   26.315051]  ? preempt_count_sub+0x50/0x80
[   26.315074]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.315096]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.315118]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   26.315140]  kthread+0x337/0x6f0
[   26.315160]  ? trace_preempt_on+0x20/0xc0
[   26.315183]  ? __pfx_kthread+0x10/0x10
[   26.315202]  ? _raw_spin_unlock_irq+0x47/0x80
[   26.315224]  ? calculate_sigpending+0x7b/0xa0
[   26.315246]  ? __pfx_kthread+0x10/0x10
[   26.315274]  ret_from_fork+0x116/0x1d0
[   26.315292]  ? __pfx_kthread+0x10/0x10
[   26.315311]  ret_from_fork_asm+0x1a/0x30
[   26.315342]  </TASK>
[   26.315352] 
[   26.330495] The buggy address belongs to the physical page:
[   26.330700] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10496c
[   26.331244] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   26.331561] flags: 0x200000000000040(head|node=0|zone=2)
[   26.332209] page_type: f8(unknown)
[   26.332431] raw: 0200000000000040 0000000000000000 dead000000000122 0000000000000000
[   26.332760] raw: 0000000000000000 0000000000000000 00000000f8000000 0000000000000000
[   26.333455] head: 0200000000000040 0000000000000000 dead000000000122 0000000000000000
[   26.333801] head: 0000000000000000 0000000000000000 00000000f8000000 0000000000000000
[   26.334305] head: 0200000000000002 ffffea0004125b01 00000000ffffffff 00000000ffffffff
[   26.334781] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
[   26.335332] page dumped because: kasan: bad access detected
[   26.335554] 
[   26.335650] Memory state around the buggy address:
[   26.335801]  ffff88810496df00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   26.336087]  ffff88810496df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   26.336368] >ffff88810496e000: 00 02 fe fe fe fe fe fe fe fe fe fe fe fe fe fe
[   26.336681]                       ^
[   26.337058]  ffff88810496e080: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
[   26.337403]  ffff88810496e100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
[   26.337682] ==================================================================