Date
May 13, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.155367] ================================================================== [ 20.155489] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 20.155591] Read of size 1 at addr fff00000c408a000 by task kunit_try_catch/213 [ 20.155668] [ 20.155725] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT [ 20.155916] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.155991] Hardware name: linux,dummy-virt (DT) [ 20.156085] Call trace: [ 20.156145] show_stack+0x20/0x38 (C) [ 20.156228] dump_stack_lvl+0x8c/0xd0 [ 20.156331] print_report+0x118/0x608 [ 20.156432] kasan_report+0xdc/0x128 [ 20.156533] __asan_report_load1_noabort+0x20/0x30 [ 20.156644] kmem_cache_rcu_uaf+0x388/0x468 [ 20.156708] kunit_try_run_case+0x170/0x3f0 [ 20.156806] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.156915] kthread+0x328/0x630 [ 20.157052] ret_from_fork+0x10/0x20 [ 20.157119] [ 20.157141] Allocated by task 213: [ 20.157177] kasan_save_stack+0x3c/0x68 [ 20.157227] kasan_save_track+0x20/0x40 [ 20.157270] kasan_save_alloc_info+0x40/0x58 [ 20.157314] __kasan_slab_alloc+0xa8/0xb0 [ 20.157509] kmem_cache_alloc_noprof+0x10c/0x3a0 [ 20.157620] kmem_cache_rcu_uaf+0x12c/0x468 [ 20.157678] kunit_try_run_case+0x170/0x3f0 [ 20.157721] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.157834] kthread+0x328/0x630 [ 20.157881] ret_from_fork+0x10/0x20 [ 20.157924] [ 20.157948] Freed by task 0: [ 20.157991] kasan_save_stack+0x3c/0x68 [ 20.158039] kasan_save_track+0x20/0x40 [ 20.158079] kasan_save_free_info+0x4c/0x78 [ 20.158124] __kasan_slab_free+0x6c/0x98 [ 20.158165] slab_free_after_rcu_debug+0xd4/0x2f8 [ 20.158210] rcu_core+0x9f4/0x1e20 [ 20.158252] rcu_core_si+0x18/0x30 [ 20.158293] handle_softirqs+0x374/0xb28 [ 20.158338] __do_softirq+0x1c/0x28 [ 20.158377] [ 20.158401] Last potentially related work creation: [ 20.158430] kasan_save_stack+0x3c/0x68 [ 20.158486] kasan_record_aux_stack+0xb4/0xc8 [ 20.158531] kmem_cache_free+0x120/0x470 [ 20.158604] kmem_cache_rcu_uaf+0x16c/0x468 [ 20.158703] kunit_try_run_case+0x170/0x3f0 [ 20.158778] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.158828] kthread+0x328/0x630 [ 20.158870] ret_from_fork+0x10/0x20 [ 20.158911] [ 20.158933] The buggy address belongs to the object at fff00000c408a000 [ 20.158933] which belongs to the cache test_cache of size 200 [ 20.159012] The buggy address is located 0 bytes inside of [ 20.159012] freed 200-byte region [fff00000c408a000, fff00000c408a0c8) [ 20.159083] [ 20.159111] The buggy address belongs to the physical page: [ 20.159150] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10408a [ 20.159219] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.159281] page_type: f5(slab) [ 20.159377] raw: 0bfffe0000000000 fff00000c6617000 dead000000000122 0000000000000000 [ 20.159491] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 20.159591] page dumped because: kasan: bad access detected [ 20.159649] [ 20.159675] Memory state around the buggy address: [ 20.159718] fff00000c4089f00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 20.159789] fff00000c4089f80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 20.159840] >fff00000c408a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.159885] ^ [ 20.159919] fff00000c408a080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 20.159977] fff00000c408a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.160027] ==================================================================
[ 11.904725] ================================================================== [ 11.905240] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.905486] Read of size 1 at addr ffff8881029dd000 by task kunit_try_catch/230 [ 11.906887] [ 11.907178] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT(voluntary) [ 11.907234] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.907355] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.907380] Call Trace: [ 11.907395] <TASK> [ 11.907416] dump_stack_lvl+0x73/0xb0 [ 11.907449] print_report+0xd1/0x650 [ 11.907472] ? __virt_addr_valid+0x1db/0x2d0 [ 11.907497] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.907539] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.907562] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.907586] kasan_report+0x141/0x180 [ 11.907608] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.907646] __asan_report_load1_noabort+0x18/0x20 [ 11.907666] kmem_cache_rcu_uaf+0x3e3/0x510 [ 11.907689] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 11.907711] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 11.907741] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 11.907769] kunit_try_run_case+0x1a5/0x480 [ 11.907794] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.907815] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.907837] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.907859] ? __kthread_parkme+0x82/0x180 [ 11.907880] ? preempt_count_sub+0x50/0x80 [ 11.907906] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.907928] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.907950] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.907972] kthread+0x337/0x6f0 [ 11.908220] ? trace_preempt_on+0x20/0xc0 [ 11.908245] ? __pfx_kthread+0x10/0x10 [ 11.908266] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.908286] ? calculate_sigpending+0x7b/0xa0 [ 11.908312] ? __pfx_kthread+0x10/0x10 [ 11.908334] ret_from_fork+0x116/0x1d0 [ 11.908352] ? __pfx_kthread+0x10/0x10 [ 11.908372] ret_from_fork_asm+0x1a/0x30 [ 11.908404] </TASK> [ 11.908415] [ 11.918855] Allocated by task 230: [ 11.918986] kasan_save_stack+0x45/0x70 [ 11.919431] kasan_save_track+0x18/0x40 [ 11.919787] kasan_save_alloc_info+0x3b/0x50 [ 11.920015] __kasan_slab_alloc+0x91/0xa0 [ 11.920272] kmem_cache_alloc_noprof+0x123/0x3f0 [ 11.920479] kmem_cache_rcu_uaf+0x155/0x510 [ 11.920814] kunit_try_run_case+0x1a5/0x480 [ 11.921127] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.921458] kthread+0x337/0x6f0 [ 11.921725] ret_from_fork+0x116/0x1d0 [ 11.921864] ret_from_fork_asm+0x1a/0x30 [ 11.922071] [ 11.922171] Freed by task 0: [ 11.922341] kasan_save_stack+0x45/0x70 [ 11.922565] kasan_save_track+0x18/0x40 [ 11.922886] kasan_save_free_info+0x3f/0x60 [ 11.923093] __kasan_slab_free+0x56/0x70 [ 11.923386] slab_free_after_rcu_debug+0xe4/0x310 [ 11.923576] rcu_core+0x66f/0x1c40 [ 11.923971] rcu_core_si+0x12/0x20 [ 11.924146] handle_softirqs+0x209/0x730 [ 11.924636] __irq_exit_rcu+0xc9/0x110 [ 11.924831] irq_exit_rcu+0x12/0x20 [ 11.924995] sysvec_apic_timer_interrupt+0x81/0x90 [ 11.925305] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 11.926244] [ 11.926343] Last potentially related work creation: [ 11.927013] kasan_save_stack+0x45/0x70 [ 11.927355] kasan_record_aux_stack+0xb2/0xc0 [ 11.927664] kmem_cache_free+0x131/0x420 [ 11.927854] kmem_cache_rcu_uaf+0x194/0x510 [ 11.928039] kunit_try_run_case+0x1a5/0x480 [ 11.928466] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.928851] kthread+0x337/0x6f0 [ 11.929019] ret_from_fork+0x116/0x1d0 [ 11.929186] ret_from_fork_asm+0x1a/0x30 [ 11.929365] [ 11.929453] The buggy address belongs to the object at ffff8881029dd000 [ 11.929453] which belongs to the cache test_cache of size 200 [ 11.930652] The buggy address is located 0 bytes inside of [ 11.930652] freed 200-byte region [ffff8881029dd000, ffff8881029dd0c8) [ 11.931847] [ 11.931969] The buggy address belongs to the physical page: [ 11.932364] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029dd [ 11.933015] flags: 0x200000000000000(node=0|zone=2) [ 11.933393] page_type: f5(slab) [ 11.933878] raw: 0200000000000000 ffff888101ce8640 dead000000000122 0000000000000000 [ 11.934403] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 11.934828] page dumped because: kasan: bad access detected [ 11.935066] [ 11.935158] Memory state around the buggy address: [ 11.935823] ffff8881029dcf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.936491] ffff8881029dcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.936950] >ffff8881029dd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.937475] ^ [ 11.937985] ffff8881029dd080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 11.938476] ffff8881029dd100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.939068] ==================================================================