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Date
Dec. 5, 2024, 2:07 p.m.

Environment
qemu-arm64
qemu-x86_64 

[   29.134709] ==================================================================
[   29.136170] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8
[   29.137313] Read of size 1 at addr fff00000c6490000 by task kunit_try_catch/137
[   29.138901] 
[   29.139205] CPU: 0 UID: 0 PID: 137 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc1-next-20241205 #1
[   29.141131] Tainted: [B]=BAD_PAGE, [N]=TEST
[   29.142107] Hardware name: linux,dummy-virt (DT)
[   29.142767] Call trace:
[   29.143482]  show_stack+0x20/0x38 (C)
[   29.144373]  dump_stack_lvl+0x8c/0xd0
[   29.145038]  print_report+0x118/0x5e0
[   29.145638]  kasan_report+0xc8/0x118
[   29.146252]  __asan_report_load1_noabort+0x20/0x30
[   29.146861]  kmalloc_large_uaf+0x2cc/0x2f8
[   29.147542]  kunit_try_run_case+0x14c/0x3d0
[   29.148134]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   29.149081]  kthread+0x24c/0x2d0
[   29.149553]  ret_from_fork+0x10/0x20
[   29.150089] 
[   29.150515] The buggy address belongs to the physical page:
[   29.151157] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106490
[   29.153003] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   29.154000] raw: 0bfffe0000000000 ffffc1ffc3192508 fff00000da4e3040 0000000000000000
[   29.154981] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[   29.156458] page dumped because: kasan: bad access detected
[   29.157099] 
[   29.157433] Memory state around the buggy address:
[   29.158287]  fff00000c648ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   29.159237]  fff00000c648ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   29.160086] >fff00000c6490000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.161412]                    ^
[   29.162004]  fff00000c6490080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.162910]  fff00000c6490100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.163968] ==================================================================
Metadata Full log Test run details 

[   26.699850] ==================================================================
[   26.700947] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f3/0x340
[   26.701594] Read of size 1 at addr ffff8881027a4000 by task kunit_try_catch/155
[   26.703485] 
[   26.703837] CPU: 1 UID: 0 PID: 155 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc1-next-20241205 #1
[   26.704744] Tainted: [B]=BAD_PAGE, [N]=TEST
[   26.705136] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   26.705922] Call Trace:
[   26.706349]  <TASK>
[   26.706635]  dump_stack_lvl+0x73/0xb0
[   26.707229]  print_report+0xd1/0x640
[   26.707846]  ? __virt_addr_valid+0x1db/0x2d0
[   26.708493]  ? kasan_addr_to_slab+0x11/0xa0
[   26.709207]  kasan_report+0x102/0x140
[   26.709546]  ? kmalloc_large_uaf+0x2f3/0x340
[   26.709997]  ? kmalloc_large_uaf+0x2f3/0x340
[   26.710395]  __asan_report_load1_noabort+0x18/0x20
[   26.711010]  kmalloc_large_uaf+0x2f3/0x340
[   26.711321]  ? __pfx_kmalloc_large_uaf+0x10/0x10
[   26.712153]  ? __schedule+0xc70/0x27e0
[   26.712597]  ? __pfx_read_tsc+0x10/0x10
[   26.713224]  ? ktime_get_ts64+0x86/0x230
[   26.713549]  kunit_try_run_case+0x1b3/0x490
[   26.714119]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.714830]  ? _raw_spin_lock_irqsave+0xa2/0x110
[   26.715431]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   26.716411]  ? __kthread_parkme+0x82/0x160
[   26.716764]  ? preempt_count_sub+0x50/0x80
[   26.717914]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.718398]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   26.719268]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.720311]  kthread+0x257/0x310
[   26.720694]  ? __pfx_kthread+0x10/0x10
[   26.721622]  ret_from_fork+0x41/0x80
[   26.723189]  ? __pfx_kthread+0x10/0x10
[   26.723541]  ret_from_fork_asm+0x1a/0x30
[   26.724219]  </TASK>
[   26.724464] 
[   26.724739] The buggy address belongs to the physical page:
[   26.725744] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027a4
[   26.726871] flags: 0x200000000000000(node=0|zone=2)
[   26.727422] raw: 0200000000000000 ffffea000409ea08 ffff88815b13f0c0 0000000000000000
[   26.728121] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[   26.728960] page dumped because: kasan: bad access detected
[   26.730129] 
[   26.730449] Memory state around the buggy address:
[   26.731101]  ffff8881027a3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   26.731895]  ffff8881027a3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   26.732843] >ffff8881027a4000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   26.733652]                    ^
[   26.734387]  ffff8881027a4080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   26.735202]  ffff8881027a4100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   26.736196] ==================================================================
Metadata Full log Test run details