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Date
Dec. 3, 2024, 11:38 p.m.

Environment
qemu-arm64
qemu-x86_64 

[   29.407777] ==================================================================
[   29.409154] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8
[   29.409863] Read of size 1 at addr fff00000c6428000 by task kunit_try_catch/137
[   29.410949] 
[   29.411620] CPU: 1 UID: 0 PID: 137 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc1-next-20241203 #1
[   29.412848] Tainted: [B]=BAD_PAGE, [N]=TEST
[   29.413902] Hardware name: linux,dummy-virt (DT)
[   29.414526] Call trace:
[   29.415271]  show_stack+0x20/0x38 (C)
[   29.415901]  dump_stack_lvl+0x8c/0xd0
[   29.416543]  print_report+0x118/0x5e0
[   29.417078]  kasan_report+0xc8/0x118
[   29.417690]  __asan_report_load1_noabort+0x20/0x30
[   29.418418]  kmalloc_large_uaf+0x2cc/0x2f8
[   29.419253]  kunit_try_run_case+0x14c/0x3d0
[   29.419888]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   29.420748]  kthread+0x24c/0x2d0
[   29.421247]  ret_from_fork+0x10/0x20
[   29.421928] 
[   29.422202] The buggy address belongs to the physical page:
[   29.422994] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106428
[   29.424049] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   29.424899] raw: 0bfffe0000000000 fff00000da50bf80 fff00000da50bf80 0000000000000000
[   29.425931] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[   29.426807] page dumped because: kasan: bad access detected
[   29.427629] 
[   29.428087] Memory state around the buggy address:
[   29.428698]  fff00000c6427f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   29.429543]  fff00000c6427f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   29.430414] >fff00000c6428000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.431530]                    ^
[   29.432124]  fff00000c6428080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.433060]  fff00000c6428100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.434278] ==================================================================
Metadata Full log Test run details 

[   25.017119] ==================================================================
[   25.018271] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f3/0x340
[   25.019266] Read of size 1 at addr ffff888102250000 by task kunit_try_catch/157
[   25.020145] 
[   25.020383] CPU: 0 UID: 0 PID: 157 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc1-next-20241203 #1
[   25.021232] Tainted: [B]=BAD_PAGE, [N]=TEST
[   25.022280] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   25.022845] Call Trace:
[   25.023072]  <TASK>
[   25.023527]  dump_stack_lvl+0x73/0xb0
[   25.024238]  print_report+0xd1/0x640
[   25.024795]  ? __virt_addr_valid+0x1db/0x2d0
[   25.025267]  ? kasan_addr_to_slab+0x11/0xa0
[   25.025896]  kasan_report+0x102/0x140
[   25.026185]  ? kmalloc_large_uaf+0x2f3/0x340
[   25.026735]  ? kmalloc_large_uaf+0x2f3/0x340
[   25.027168]  __asan_report_load1_noabort+0x18/0x20
[   25.027834]  kmalloc_large_uaf+0x2f3/0x340
[   25.028223]  ? __pfx_kmalloc_large_uaf+0x10/0x10
[   25.029133]  ? __pfx_kmalloc_large_uaf+0x10/0x10
[   25.029726]  kunit_try_run_case+0x1b3/0x490
[   25.030697]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.031089]  ? _raw_spin_lock_irqsave+0xa2/0x110
[   25.031757]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   25.032597]  ? __kthread_parkme+0x82/0x160
[   25.033163]  ? preempt_count_sub+0x50/0x80
[   25.033883]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.034256]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   25.035101]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.035581]  kthread+0x257/0x310
[   25.035909]  ? __pfx_kthread+0x10/0x10
[   25.036753]  ret_from_fork+0x41/0x80
[   25.037261]  ? __pfx_kthread+0x10/0x10
[   25.038303]  ret_from_fork_asm+0x1a/0x30
[   25.038566]  </TASK>
[   25.039279] 
[   25.039438] The buggy address belongs to the physical page:
[   25.040512] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102250
[   25.041424] flags: 0x200000000000000(node=0|zone=2)
[   25.042307] raw: 0200000000000000 ffffea0004089508 ffff88815b03f040 0000000000000000
[   25.042663] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[   25.043297] page dumped because: kasan: bad access detected
[   25.043779] 
[   25.043987] Memory state around the buggy address:
[   25.044845]  ffff88810224ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.045422]  ffff88810224ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.046734] >ffff888102250000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   25.047004]                    ^
[   25.047873]  ffff888102250080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   25.048323]  ffff888102250100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   25.049174] ==================================================================
Metadata Full log Test run details