Hay
Date
July 10, 2025, 6:10 p.m.

Environment
qemu-arm64
qemu-x86_64

[   16.613581] ==================================================================
[   16.613865] BUG: KASAN: invalid-free in kfree+0x270/0x3c8
[   16.614291] Free of addr fff00000c78a0001 by task kunit_try_catch/150
[   16.614945] 
[   16.615063] CPU: 1 UID: 0 PID: 150 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT 
[   16.615152] Tainted: [B]=BAD_PAGE, [N]=TEST
[   16.615178] Hardware name: linux,dummy-virt (DT)
[   16.615209] Call trace:
[   16.615232]  show_stack+0x20/0x38 (C)
[   16.615285]  dump_stack_lvl+0x8c/0xd0
[   16.615332]  print_report+0x118/0x608
[   16.615390]  kasan_report_invalid_free+0xc0/0xe8
[   16.615443]  __kasan_kfree_large+0x5c/0xa8
[   16.615489]  free_large_kmalloc+0x64/0x190
[   16.615534]  kfree+0x270/0x3c8
[   16.615575]  kmalloc_large_invalid_free+0x108/0x270
[   16.615623]  kunit_try_run_case+0x170/0x3f0
[   16.615671]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   16.615723]  kthread+0x328/0x630
[   16.615765]  ret_from_fork+0x10/0x20
[   16.615811] 
[   16.615832] The buggy address belongs to the physical page:
[   16.615864] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078a0
[   16.616488] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   16.617211] flags: 0xbfffe0000000040(head|node=0|zone=2|lastcpupid=0x1ffff)
[   16.617514] page_type: f8(unknown)
[   16.617564] raw: 0bfffe0000000040 0000000000000000 dead000000000122 0000000000000000
[   16.618001] raw: 0000000000000000 0000000000000000 00000001f8000000 0000000000000000
[   16.618277] head: 0bfffe0000000040 0000000000000000 dead000000000122 0000000000000000
[   16.618366] head: 0000000000000000 0000000000000000 00000001f8000000 0000000000000000
[   16.618416] head: 0bfffe0000000002 ffffc1ffc31e2801 00000000ffffffff 00000000ffffffff
[   16.618463] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
[   16.619119] page dumped because: kasan: bad access detected
[   16.619233] 
[   16.619528] Memory state around the buggy address:
[   16.619597]  fff00000c789ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   16.619889]  fff00000c789ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   16.620119] >fff00000c78a0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   16.620237]                    ^
[   16.620268]  fff00000c78a0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   16.620474]  fff00000c78a0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   16.620956] ==================================================================

[   12.087295] ==================================================================
[   12.087785] BUG: KASAN: invalid-free in kfree+0x274/0x3f0
[   12.088209] Free of addr ffff888102a50001 by task kunit_try_catch/167
[   12.088453] 
[   12.088564] CPU: 1 UID: 0 PID: 167 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT(voluntary) 
[   12.088605] Tainted: [B]=BAD_PAGE, [N]=TEST
[   12.088616] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   12.088634] Call Trace:
[   12.088645]  <TASK>
[   12.088658]  dump_stack_lvl+0x73/0xb0
[   12.088685]  print_report+0xd1/0x650
[   12.088706]  ? __virt_addr_valid+0x1db/0x2d0
[   12.088729]  ? kasan_addr_to_slab+0x11/0xa0
[   12.088749]  ? kfree+0x274/0x3f0
[   12.088769]  kasan_report_invalid_free+0x10a/0x130
[   12.088859]  ? kfree+0x274/0x3f0
[   12.088886]  ? kfree+0x274/0x3f0
[   12.088905]  __kasan_kfree_large+0x86/0xd0
[   12.088945]  free_large_kmalloc+0x4b/0x110
[   12.088969]  kfree+0x274/0x3f0
[   12.088992]  kmalloc_large_invalid_free+0x120/0x2b0
[   12.089015]  ? __pfx_kmalloc_large_invalid_free+0x10/0x10
[   12.089047]  ? sysvec_apic_timer_interrupt+0x50/0x90
[   12.089073]  ? trace_hardirqs_on+0x37/0xe0
[   12.089096]  ? __pfx_read_tsc+0x10/0x10
[   12.089115]  ? ktime_get_ts64+0x86/0x230
[   12.089138]  kunit_try_run_case+0x1a5/0x480
[   12.089161]  ? __pfx_kunit_try_run_case+0x10/0x10
[   12.089186]  ? queued_spin_lock_slowpath+0x116/0xb40
[   12.089210]  ? __kthread_parkme+0x82/0x180
[   12.089230]  ? preempt_count_sub+0x50/0x80
[   12.089253]  ? __pfx_kunit_try_run_case+0x10/0x10
[   12.089277]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.089300]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   12.089325]  kthread+0x337/0x6f0
[   12.089343]  ? trace_preempt_on+0x20/0xc0
[   12.089365]  ? __pfx_kthread+0x10/0x10
[   12.089385]  ? _raw_spin_unlock_irq+0x47/0x80
[   12.089407]  ? calculate_sigpending+0x7b/0xa0
[   12.089430]  ? __pfx_kthread+0x10/0x10
[   12.089450]  ret_from_fork+0x116/0x1d0
[   12.089468]  ? __pfx_kthread+0x10/0x10
[   12.089487]  ret_from_fork_asm+0x1a/0x30
[   12.089517]  </TASK>
[   12.089527] 
[   12.097060] The buggy address belongs to the physical page:
[   12.097310] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a50
[   12.097640] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[   12.098225] flags: 0x200000000000040(head|node=0|zone=2)
[   12.098442] page_type: f8(unknown)
[   12.098611] raw: 0200000000000040 0000000000000000 dead000000000122 0000000000000000
[   12.098986] raw: 0000000000000000 0000000000000000 00000001f8000000 0000000000000000
[   12.099334] head: 0200000000000040 0000000000000000 dead000000000122 0000000000000000
[   12.099607] head: 0000000000000000 0000000000000000 00000001f8000000 0000000000000000
[   12.099923] head: 0200000000000002 ffffea00040a9401 00000000ffffffff 00000000ffffffff
[   12.100294] head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
[   12.100608] page dumped because: kasan: bad access detected
[   12.100894] 
[   12.100990] Memory state around the buggy address:
[   12.101156]  ffff888102a4ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.101472]  ffff888102a4ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.101848] >ffff888102a50000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   12.102154]                    ^
[   12.102318]  ffff888102a50080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   12.102598]  ffff888102a50100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   12.103119] ==================================================================