Date
June 3, 2025, 7:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.529135] ================================================================== [ 19.529461] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 19.529586] Read of size 1 at addr fff00000c65d7000 by task kunit_try_catch/213 [ 19.529640] [ 19.529690] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT [ 19.529787] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.529813] Hardware name: linux,dummy-virt (DT) [ 19.529874] Call trace: [ 19.529899] show_stack+0x20/0x38 (C) [ 19.529969] dump_stack_lvl+0x8c/0xd0 [ 19.530030] print_report+0x118/0x608 [ 19.530098] kasan_report+0xdc/0x128 [ 19.530145] __asan_report_load1_noabort+0x20/0x30 [ 19.530194] kmem_cache_rcu_uaf+0x388/0x468 [ 19.530255] kunit_try_run_case+0x170/0x3f0 [ 19.530522] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.530612] kthread+0x328/0x630 [ 19.530658] ret_from_fork+0x10/0x20 [ 19.530730] [ 19.530749] Allocated by task 213: [ 19.530781] kasan_save_stack+0x3c/0x68 [ 19.530838] kasan_save_track+0x20/0x40 [ 19.530883] kasan_save_alloc_info+0x40/0x58 [ 19.531100] __kasan_slab_alloc+0xa8/0xb0 [ 19.531179] kmem_cache_alloc_noprof+0x10c/0x398 [ 19.531239] kmem_cache_rcu_uaf+0x12c/0x468 [ 19.531285] kunit_try_run_case+0x170/0x3f0 [ 19.531338] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.531410] kthread+0x328/0x630 [ 19.531455] ret_from_fork+0x10/0x20 [ 19.531491] [ 19.531509] Freed by task 0: [ 19.531810] kasan_save_stack+0x3c/0x68 [ 19.531885] kasan_save_track+0x20/0x40 [ 19.531933] kasan_save_free_info+0x4c/0x78 [ 19.532021] __kasan_slab_free+0x6c/0x98 [ 19.532057] slab_free_after_rcu_debug+0xd4/0x2f8 [ 19.532130] rcu_core+0x9f4/0x1e20 [ 19.532505] rcu_core_si+0x18/0x30 [ 19.532610] handle_softirqs+0x374/0xb28 [ 19.532678] __do_softirq+0x1c/0x28 [ 19.532735] [ 19.532771] Last potentially related work creation: [ 19.532860] kasan_save_stack+0x3c/0x68 [ 19.532929] kasan_record_aux_stack+0xb4/0xc8 [ 19.533014] kmem_cache_free+0x120/0x468 [ 19.533103] kmem_cache_rcu_uaf+0x16c/0x468 [ 19.533180] kunit_try_run_case+0x170/0x3f0 [ 19.533253] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.533523] kthread+0x328/0x630 [ 19.533612] ret_from_fork+0x10/0x20 [ 19.533728] [ 19.533800] The buggy address belongs to the object at fff00000c65d7000 [ 19.533800] which belongs to the cache test_cache of size 200 [ 19.533938] The buggy address is located 0 bytes inside of [ 19.533938] freed 200-byte region [fff00000c65d7000, fff00000c65d70c8) [ 19.534048] [ 19.534091] The buggy address belongs to the physical page: [ 19.534124] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065d7 [ 19.534406] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.534509] page_type: f5(slab) [ 19.534562] raw: 0bfffe0000000000 fff00000c65c9140 dead000000000122 0000000000000000 [ 19.534614] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 19.534656] page dumped because: kasan: bad access detected [ 19.534688] [ 19.534717] Memory state around the buggy address: [ 19.534777] fff00000c65d6f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 19.534836] fff00000c65d6f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 19.534890] >fff00000c65d7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.534946] ^ [ 19.534976] fff00000c65d7080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.535028] fff00000c65d7100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.535097] ==================================================================
[ 15.533056] ================================================================== [ 15.533722] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 15.533961] Read of size 1 at addr ffff8881033e6000 by task kunit_try_catch/230 [ 15.534130] [ 15.534602] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT(voluntary) [ 15.534671] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.534686] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 15.534713] Call Trace: [ 15.534732] <TASK> [ 15.534760] dump_stack_lvl+0x73/0xb0 [ 15.534799] print_report+0xd1/0x650 [ 15.534829] ? __virt_addr_valid+0x1db/0x2d0 [ 15.534858] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 15.534918] ? kasan_complete_mode_report_info+0x64/0x200 [ 15.534945] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 15.534971] kasan_report+0x141/0x180 [ 15.534997] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 15.535028] __asan_report_load1_noabort+0x18/0x20 [ 15.535051] kmem_cache_rcu_uaf+0x3e3/0x510 [ 15.535077] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 15.535102] ? finish_task_switch.isra.0+0x153/0x700 [ 15.535129] ? __switch_to+0x47/0xf50 [ 15.535162] ? __pfx_read_tsc+0x10/0x10 [ 15.535188] ? ktime_get_ts64+0x86/0x230 [ 15.535217] kunit_try_run_case+0x1a5/0x480 [ 15.535243] ? __pfx_kunit_try_run_case+0x10/0x10 [ 15.535265] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 15.535294] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 15.535321] ? __kthread_parkme+0x82/0x180 [ 15.535379] ? preempt_count_sub+0x50/0x80 [ 15.535412] ? __pfx_kunit_try_run_case+0x10/0x10 [ 15.535435] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.535476] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 15.535506] kthread+0x337/0x6f0 [ 15.535528] ? trace_preempt_on+0x20/0xc0 [ 15.535556] ? __pfx_kthread+0x10/0x10 [ 15.535610] ? _raw_spin_unlock_irq+0x47/0x80 [ 15.535635] ? calculate_sigpending+0x7b/0xa0 [ 15.535663] ? __pfx_kthread+0x10/0x10 [ 15.535687] ret_from_fork+0x116/0x1d0 [ 15.535708] ? __pfx_kthread+0x10/0x10 [ 15.535732] ret_from_fork_asm+0x1a/0x30 [ 15.535767] </TASK> [ 15.535781] [ 15.544363] Allocated by task 230: [ 15.545269] kasan_save_stack+0x45/0x70 [ 15.545524] kasan_save_track+0x18/0x40 [ 15.546178] kasan_save_alloc_info+0x3b/0x50 [ 15.546448] __kasan_slab_alloc+0x91/0xa0 [ 15.546696] kmem_cache_alloc_noprof+0x123/0x3f0 [ 15.546978] kmem_cache_rcu_uaf+0x155/0x510 [ 15.547237] kunit_try_run_case+0x1a5/0x480 [ 15.547515] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.547805] kthread+0x337/0x6f0 [ 15.548008] ret_from_fork+0x116/0x1d0 [ 15.548239] ret_from_fork_asm+0x1a/0x30 [ 15.548642] [ 15.549269] Freed by task 0: [ 15.549372] kasan_save_stack+0x45/0x70 [ 15.549616] kasan_save_track+0x18/0x40 [ 15.549843] kasan_save_free_info+0x3f/0x60 [ 15.550291] __kasan_slab_free+0x56/0x70 [ 15.550730] slab_free_after_rcu_debug+0xe4/0x310 [ 15.551178] rcu_core+0x66f/0x1c40 [ 15.551453] rcu_core_si+0x12/0x20 [ 15.551697] handle_softirqs+0x209/0x730 [ 15.552654] __irq_exit_rcu+0xc9/0x110 [ 15.552968] irq_exit_rcu+0x12/0x20 [ 15.553383] sysvec_apic_timer_interrupt+0x81/0x90 [ 15.553844] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 15.554431] [ 15.554689] Last potentially related work creation: [ 15.555043] kasan_save_stack+0x45/0x70 [ 15.555496] kasan_record_aux_stack+0xb2/0xc0 [ 15.555936] kmem_cache_free+0x131/0x420 [ 15.556362] kmem_cache_rcu_uaf+0x194/0x510 [ 15.556668] kunit_try_run_case+0x1a5/0x480 [ 15.557122] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.557414] kthread+0x337/0x6f0 [ 15.557659] ret_from_fork+0x116/0x1d0 [ 15.558220] ret_from_fork_asm+0x1a/0x30 [ 15.558675] [ 15.558919] The buggy address belongs to the object at ffff8881033e6000 [ 15.558919] which belongs to the cache test_cache of size 200 [ 15.559213] The buggy address is located 0 bytes inside of [ 15.559213] freed 200-byte region [ffff8881033e6000, ffff8881033e60c8) [ 15.560212] [ 15.560349] The buggy address belongs to the physical page: [ 15.560669] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1033e6 [ 15.561009] flags: 0x200000000000000(node=0|zone=2) [ 15.561162] page_type: f5(slab) [ 15.561393] raw: 0200000000000000 ffff8881033e3000 dead000000000122 0000000000000000 [ 15.562159] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 15.562671] page dumped because: kasan: bad access detected [ 15.563110] [ 15.563520] Memory state around the buggy address: [ 15.563702] ffff8881033e5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.563903] ffff8881033e5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.564236] >ffff8881033e6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.564510] ^ [ 15.564771] ffff8881033e6080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 15.565023] ffff8881033e6100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.565273] ==================================================================