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Date
Nov. 20, 2024, 6:35 a.m.

Environment
qemu-arm64
qemu-x86_64 

[   35.779585] ==================================================================
[   35.780804] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8
[   35.781613] Read of size 1 at addr fff00000c64d0000 by task kunit_try_catch/137
[   35.782209] 
[   35.782859] CPU: 0 UID: 0 PID: 137 Comm: kunit_try_catch Tainted: G    B            N 6.12.0-next-20241120 #1
[   35.784176] Tainted: [B]=BAD_PAGE, [N]=TEST
[   35.785103] Hardware name: linux,dummy-virt (DT)
[   35.786057] Call trace:
[   35.786371]  show_stack+0x20/0x38 (C)
[   35.786854]  dump_stack_lvl+0x8c/0xd0
[   35.787268]  print_report+0x118/0x5e0
[   35.787649]  kasan_report+0xc8/0x118
[   35.789006]  __asan_report_load1_noabort+0x20/0x30
[   35.789660]  kmalloc_large_uaf+0x2cc/0x2f8
[   35.790519]  kunit_try_run_case+0x14c/0x3d0
[   35.791183]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   35.791719]  kthread+0x24c/0x2d0
[   35.792120]  ret_from_fork+0x10/0x20
[   35.792838] 
[   35.793623] The buggy address belongs to the physical page:
[   35.794954] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1064d0
[   35.796330] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   35.797113] raw: 0bfffe0000000000 ffffc1ffc3193508 fff00000da4e4f80 0000000000000000
[   35.798216] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[   35.799173] page dumped because: kasan: bad access detected
[   35.799876] 
[   35.800201] Memory state around the buggy address:
[   35.801131]  fff00000c64cff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   35.801876]  fff00000c64cff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   35.803266] >fff00000c64d0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   35.803886]                    ^
[   35.804321]  fff00000c64d0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   35.805047]  fff00000c64d0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   35.805865] ==================================================================
Metadata Full log Test run details 

[   27.010388] ==================================================================
[   27.011512] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f3/0x340
[   27.012121] Read of size 1 at addr ffff888102320000 by task kunit_try_catch/155
[   27.013875] 
[   27.014044] CPU: 0 UID: 0 PID: 155 Comm: kunit_try_catch Tainted: G    B            N 6.12.0-next-20241120 #1
[   27.015113] Tainted: [B]=BAD_PAGE, [N]=TEST
[   27.015454] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   27.016865] Call Trace:
[   27.017567]  <TASK>
[   27.017893]  dump_stack_lvl+0x73/0xb0
[   27.018797]  print_report+0xd1/0x640
[   27.019075]  ? __virt_addr_valid+0x1db/0x2d0
[   27.019992]  ? kasan_addr_to_slab+0x11/0xa0
[   27.020615]  kasan_report+0x102/0x140
[   27.021524]  ? kmalloc_large_uaf+0x2f3/0x340
[   27.022358]  ? kmalloc_large_uaf+0x2f3/0x340
[   27.023065]  __asan_report_load1_noabort+0x18/0x20
[   27.023511]  kmalloc_large_uaf+0x2f3/0x340
[   27.024442]  ? __pfx_kmalloc_large_uaf+0x10/0x10
[   27.025137]  ? __schedule+0xc3e/0x2790
[   27.026023]  ? __pfx_read_tsc+0x10/0x10
[   27.026891]  ? ktime_get_ts64+0x84/0x230
[   27.027601]  kunit_try_run_case+0x1b3/0x490
[   27.028762]  ? __pfx_kunit_try_run_case+0x10/0x10
[   27.029135]  ? _raw_spin_lock_irqsave+0xa2/0x110
[   27.029808]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   27.030875]  ? __kthread_parkme+0x82/0x160
[   27.031683]  ? preempt_count_sub+0x50/0x80
[   27.032428]  ? __pfx_kunit_try_run_case+0x10/0x10
[   27.032904]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   27.033824]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.034600]  kthread+0x257/0x310
[   27.035358]  ? __pfx_kthread+0x10/0x10
[   27.036107]  ret_from_fork+0x41/0x80
[   27.036993]  ? __pfx_kthread+0x10/0x10
[   27.037541]  ret_from_fork_asm+0x1a/0x30
[   27.038085]  </TASK>
[   27.038788] 
[   27.038954] The buggy address belongs to the physical page:
[   27.039985] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102320
[   27.040953] flags: 0x200000000000000(node=0|zone=2)
[   27.041814] raw: 0200000000000000 ffffea000408c908 ffff88815b03f000 0000000000000000
[   27.042508] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[   27.043234] page dumped because: kasan: bad access detected
[   27.044621] 
[   27.045353] Memory state around the buggy address:
[   27.045608]  ffff88810231ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   27.046142]  ffff88810231ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   27.047448] >ffff888102320000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   27.049110]                    ^
[   27.049566]  ffff888102320080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   27.050291]  ffff888102320100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   27.051407] ==================================================================
Metadata Full log Test run details