Hay
Date
July 1, 2025, 12:10 a.m.

Environment
qemu-arm64
qemu-x86_64

[   17.152332] ==================================================================
[   17.152726] BUG: KASAN: invalid-free in kfree+0x270/0x3c8
[   17.152936] Free of addr fff00000c6634001 by task kunit_try_catch/150
[   17.152985] 
[   17.153233] CPU: 1 UID: 0 PID: 150 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc4 #1 PREEMPT 
[   17.153368] Tainted: [B]=BAD_PAGE, [N]=TEST
[   17.153421] Hardware name: linux,dummy-virt (DT)
[   17.153472] Call trace:
[   17.153496]  show_stack+0x20/0x38 (C)
[   17.153563]  dump_stack_lvl+0x8c/0xd0
[   17.153614]  print_report+0x118/0x608
[   17.153659]  kasan_report_invalid_free+0xc0/0xe8
[   17.153708]  __kasan_kfree_large+0x5c/0xa8
[   17.153754]  free_large_kmalloc+0x64/0x190
[   17.153807]  kfree+0x270/0x3c8
[   17.153848]  kmalloc_large_invalid_free+0x108/0x270
[   17.153895]  kunit_try_run_case+0x170/0x3f0
[   17.153942]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   17.154003]  kthread+0x328/0x630
[   17.154044]  ret_from_fork+0x10/0x20
[   17.154100] 
[   17.154121] The buggy address belongs to the physical page:
[   17.154165] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106634
[   17.154219] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   17.154265] flags: 0xbfffe0000000040(head|node=0|zone=2|lastcpupid=0x1ffff)
[   17.154326] page_type: f8(unknown)
[   17.154375] raw: 0bfffe0000000040 0000000000000000 dead000000000122 0000000000000000
[   17.154713] raw: 0000000000000000 0000000000000000 00000001f8000000 0000000000000000
[   17.155058] head: 0bfffe0000000040 0000000000000000 dead000000000122 0000000000000000
[   17.155326] head: 0000000000000000 0000000000000000 00000001f8000000 0000000000000000
[   17.155399] head: 0bfffe0000000002 ffffc1ffc3198d01 00000000ffffffff 00000000ffffffff
[   17.155462] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
[   17.155502] page dumped because: kasan: bad access detected
[   17.155534] 
[   17.155552] Memory state around the buggy address:
[   17.155585]  fff00000c6633f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.155804]  fff00000c6633f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.155926] >fff00000c6634000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   17.156003]                    ^
[   17.156041]  fff00000c6634080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   17.156168]  fff00000c6634100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   17.156291] ==================================================================

[   11.023199] ==================================================================
[   11.023856] BUG: KASAN: invalid-free in kfree+0x274/0x3f0
[   11.024174] Free of addr ffff8881029b4001 by task kunit_try_catch/167
[   11.024632] 
[   11.024880] CPU: 0 UID: 0 PID: 167 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc4 #1 PREEMPT(voluntary) 
[   11.024923] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.024936] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.024985] Call Trace:
[   11.024997]  <TASK>
[   11.025010]  dump_stack_lvl+0x73/0xb0
[   11.025149]  print_report+0xd1/0x650
[   11.025192]  ? __virt_addr_valid+0x1db/0x2d0
[   11.025216]  ? kasan_addr_to_slab+0x11/0xa0
[   11.025235]  ? kfree+0x274/0x3f0
[   11.025256]  kasan_report_invalid_free+0x10a/0x130
[   11.025279]  ? kfree+0x274/0x3f0
[   11.025302]  ? kfree+0x274/0x3f0
[   11.025322]  __kasan_kfree_large+0x86/0xd0
[   11.025342]  free_large_kmalloc+0x4b/0x110
[   11.025365]  kfree+0x274/0x3f0
[   11.025385]  ? kmalloc_large_invalid_free+0x8f/0x2b0
[   11.025409]  kmalloc_large_invalid_free+0x120/0x2b0
[   11.025429]  ? __pfx_kmalloc_large_invalid_free+0x10/0x10
[   11.025451]  ? __schedule+0x10cc/0x2b60
[   11.025471]  ? __pfx_read_tsc+0x10/0x10
[   11.025491]  ? ktime_get_ts64+0x86/0x230
[   11.025513]  kunit_try_run_case+0x1a5/0x480
[   11.025536]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.025557]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.025577]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.025598]  ? __kthread_parkme+0x82/0x180
[   11.025617]  ? preempt_count_sub+0x50/0x80
[   11.025639]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.025661]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.025682]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.025703]  kthread+0x337/0x6f0
[   11.025722]  ? trace_preempt_on+0x20/0xc0
[   11.025744]  ? __pfx_kthread+0x10/0x10
[   11.025763]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.025782]  ? calculate_sigpending+0x7b/0xa0
[   11.025805]  ? __pfx_kthread+0x10/0x10
[   11.025825]  ret_from_fork+0x116/0x1d0
[   11.025842]  ? __pfx_kthread+0x10/0x10
[   11.025861]  ret_from_fork_asm+0x1a/0x30
[   11.025890]  </TASK>
[   11.025901] 
[   11.038774] The buggy address belongs to the physical page:
[   11.038964] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029b4
[   11.039321] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   11.039992] flags: 0x200000000000040(head|node=0|zone=2)
[   11.040342] page_type: f8(unknown)
[   11.040513] raw: 0200000000000040 0000000000000000 dead000000000122 0000000000000000
[   11.040808] raw: 0000000000000000 0000000000000000 00000001f8000000 0000000000000000
[   11.041248] head: 0200000000000040 0000000000000000 dead000000000122 0000000000000000
[   11.041603] head: 0000000000000000 0000000000000000 00000001f8000000 0000000000000000
[   11.041910] head: 0200000000000002 ffffea00040a6d01 00000000ffffffff 00000000ffffffff
[   11.042422] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
[   11.042754] page dumped because: kasan: bad access detected
[   11.043018] 
[   11.043129] Memory state around the buggy address:
[   11.043556]  ffff8881029b3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.044043]  ffff8881029b3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.044461] >ffff8881029b4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   11.044769]                    ^
[   11.044938]  ffff8881029b4080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   11.045393]  ffff8881029b4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   11.045643] ==================================================================