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

Environment
qemu-arm64
qemu-x86_64 

[   29.497863] ==================================================================
[   29.499847] BUG: KASAN: use-after-free in page_alloc_uaf+0x328/0x350
[   29.500600] Read of size 1 at addr fff00000c6540000 by task kunit_try_catch/143
[   29.501661] 
[   29.502208] CPU: 0 UID: 0 PID: 143 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc1-next-20241203 #1
[   29.503981] Tainted: [B]=BAD_PAGE, [N]=TEST
[   29.504623] Hardware name: linux,dummy-virt (DT)
[   29.505512] Call trace:
[   29.506000]  show_stack+0x20/0x38 (C)
[   29.506636]  dump_stack_lvl+0x8c/0xd0
[   29.507657]  print_report+0x118/0x5e0
[   29.508245]  kasan_report+0xc8/0x118
[   29.508774]  __asan_report_load1_noabort+0x20/0x30
[   29.509485]  page_alloc_uaf+0x328/0x350
[   29.510128]  kunit_try_run_case+0x14c/0x3d0
[   29.510785]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   29.511537]  kthread+0x24c/0x2d0
[   29.512093]  ret_from_fork+0x10/0x20
[   29.512789] 
[   29.513165] The buggy address belongs to the physical page:
[   29.513977] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106540
[   29.514952] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   29.516153] page_type: f0(buddy)
[   29.516658] raw: 0bfffe0000000000 fff00000ff6151b0 fff00000ff6151b0 0000000000000000
[   29.517672] raw: 0000000000000000 0000000000000006 00000000f0000000 0000000000000000
[   29.518598] page dumped because: kasan: bad access detected
[   29.519551] 
[   29.519892] Memory state around the buggy address:
[   29.520442]  fff00000c653ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.521319]  fff00000c653ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.522249] >fff00000c6540000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.523318]                    ^
[   29.523895]  fff00000c6540080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.524798]  fff00000c6540100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   29.525547] ==================================================================
Metadata Full log Test run details 

[   25.112684] ==================================================================
[   25.113925] BUG: KASAN: use-after-free in page_alloc_uaf+0x358/0x3d0
[   25.114802] Read of size 1 at addr ffff888102b00000 by task kunit_try_catch/163
[   25.115242] 
[   25.115425] CPU: 1 UID: 0 PID: 163 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc1-next-20241203 #1
[   25.117556] Tainted: [B]=BAD_PAGE, [N]=TEST
[   25.118303] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   25.119088] Call Trace:
[   25.119400]  <TASK>
[   25.119768]  dump_stack_lvl+0x73/0xb0
[   25.120244]  print_report+0xd1/0x640
[   25.120754]  ? __virt_addr_valid+0x1db/0x2d0
[   25.121174]  ? kasan_addr_to_slab+0x11/0xa0
[   25.121671]  kasan_report+0x102/0x140
[   25.122115]  ? page_alloc_uaf+0x358/0x3d0
[   25.122543]  ? page_alloc_uaf+0x358/0x3d0
[   25.123173]  __asan_report_load1_noabort+0x18/0x20
[   25.123636]  page_alloc_uaf+0x358/0x3d0
[   25.123888]  ? __pfx_page_alloc_uaf+0x10/0x10
[   25.124253]  ? __schedule+0xc3e/0x2790
[   25.124762]  ? __pfx_read_tsc+0x10/0x10
[   25.125223]  ? ktime_get_ts64+0x86/0x230
[   25.125820]  kunit_try_run_case+0x1b3/0x490
[   25.126230]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.126771]  ? _raw_spin_lock_irqsave+0xa2/0x110
[   25.127295]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   25.128074]  ? __kthread_parkme+0x82/0x160
[   25.128808]  ? preempt_count_sub+0x50/0x80
[   25.129623]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.130692]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   25.131173]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.131793]  kthread+0x257/0x310
[   25.132131]  ? __pfx_kthread+0x10/0x10
[   25.132615]  ret_from_fork+0x41/0x80
[   25.133522]  ? __pfx_kthread+0x10/0x10
[   25.133903]  ret_from_fork_asm+0x1a/0x30
[   25.134207]  </TASK>
[   25.134439] 
[   25.135431] The buggy address belongs to the physical page:
[   25.136152] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b00
[   25.137265] flags: 0x200000000000000(node=0|zone=2)
[   25.138276] page_type: f0(buddy)
[   25.138883] raw: 0200000000000000 ffff88817fffc5c0 ffff88817fffc5c0 0000000000000000
[   25.139978] raw: 0000000000000000 0000000000000008 00000000f0000000 0000000000000000
[   25.140734] page dumped because: kasan: bad access detected
[   25.141443] 
[   25.141914] Memory state around the buggy address:
[   25.142313]  ffff888102afff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   25.143319]  ffff888102afff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   25.143898] >ffff888102b00000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   25.144909]                    ^
[   25.145450]  ffff888102b00080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   25.146396]  ffff888102b00100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   25.146967] ==================================================================
Metadata Full log Test run details