Date
June 2, 2025, 2:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.883906] ================================================================== [ 20.884712] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3a4/0x488 [ 20.885251] Read of size 1 at addr fff00000c6cf8000 by task kunit_try_catch/200 [ 20.885673] [ 20.885906] CPU: 0 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 20.886023] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.886059] Hardware name: linux,dummy-virt (DT) [ 20.886103] Call trace: [ 20.886133] dump_backtrace+0x9c/0x128 [ 20.886190] show_stack+0x20/0x38 [ 20.886234] dump_stack_lvl+0x8c/0xd0 [ 20.886301] print_report+0x118/0x5f0 [ 20.886343] kasan_report+0xdc/0x128 [ 20.886385] __asan_report_load1_noabort+0x20/0x30 [ 20.886434] kmem_cache_rcu_uaf+0x3a4/0x488 [ 20.886481] kunit_try_run_case+0x170/0x3f0 [ 20.886530] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.886580] kthread+0x24c/0x2d0 [ 20.886626] ret_from_fork+0x10/0x20 [ 20.886674] [ 20.890197] Allocated by task 200: [ 20.890698] kasan_save_stack+0x3c/0x68 [ 20.891236] kasan_save_track+0x20/0x40 [ 20.892741] kasan_save_alloc_info+0x40/0x58 [ 20.893347] __kasan_slab_alloc+0xa8/0xb0 [ 20.893825] kmem_cache_alloc_noprof+0xf8/0x300 [ 20.894291] kmem_cache_rcu_uaf+0x130/0x488 [ 20.894678] kunit_try_run_case+0x170/0x3f0 [ 20.895297] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.896190] kthread+0x24c/0x2d0 [ 20.896557] ret_from_fork+0x10/0x20 [ 20.896840] [ 20.897524] Freed by task 0: [ 20.898036] kasan_save_stack+0x3c/0x68 [ 20.898569] kasan_save_track+0x20/0x40 [ 20.899184] kasan_save_free_info+0x4c/0x78 [ 20.899829] __kasan_slab_free+0x6c/0x98 [ 20.900313] slab_free_after_rcu_debug+0xd0/0x2d0 [ 20.900777] rcu_core+0xa54/0x1df8 [ 20.901316] rcu_core_si+0x18/0x30 [ 20.901751] handle_softirqs+0x36c/0xb18 [ 20.902252] __do_softirq+0x1c/0x28 [ 20.902656] [ 20.902917] Last potentially related work creation: [ 20.903535] kasan_save_stack+0x3c/0x68 [ 20.903997] __kasan_record_aux_stack+0xbc/0xe8 [ 20.904440] kasan_record_aux_stack_noalloc+0x14/0x20 [ 20.904960] kmem_cache_free+0x28c/0x460 [ 20.907315] kmem_cache_rcu_uaf+0x170/0x488 [ 20.908673] kunit_try_run_case+0x170/0x3f0 [ 20.909591] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.910571] kthread+0x24c/0x2d0 [ 20.910898] ret_from_fork+0x10/0x20 [ 20.911225] [ 20.912692] The buggy address belongs to the object at fff00000c6cf8000 [ 20.912692] which belongs to the cache test_cache of size 200 [ 20.914563] The buggy address is located 0 bytes inside of [ 20.914563] freed 200-byte region [fff00000c6cf8000, fff00000c6cf80c8) [ 20.915320] [ 20.915534] The buggy address belongs to the physical page: [ 20.915940] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106cf8 [ 20.918947] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.920213] page_type: f5(slab) [ 20.920728] raw: 0bfffe0000000000 fff00000c5a6fb40 dead000000000122 0000000000000000 [ 20.921596] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 20.922168] page dumped because: kasan: bad access detected [ 20.922789] [ 20.923060] Memory state around the buggy address: [ 20.923786] fff00000c6cf7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.924638] fff00000c6cf7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.925707] >fff00000c6cf8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.926490] ^ [ 20.926964] fff00000c6cf8080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 20.928065] fff00000c6cf8100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.928719] ==================================================================
[ 12.886502] ================================================================== [ 12.886907] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510 [ 12.887072] Read of size 1 at addr ffff888102628000 by task kunit_try_catch/218 [ 12.887198] [ 12.887267] CPU: 0 UID: 0 PID: 218 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 12.887313] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.887324] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.887346] Call Trace: [ 12.887361] <TASK> [ 12.887383] dump_stack_lvl+0x73/0xb0 [ 12.887410] print_report+0xd1/0x640 [ 12.887432] ? __virt_addr_valid+0x1db/0x2d0 [ 12.887455] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 12.887474] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.887494] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 12.887513] kasan_report+0x140/0x180 [ 12.887534] ? kmem_cache_rcu_uaf+0x3e5/0x510 [ 12.887556] __asan_report_load1_noabort+0x18/0x20 [ 12.887575] kmem_cache_rcu_uaf+0x3e5/0x510 [ 12.887593] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 12.887610] ? finish_task_switch.isra.0+0x153/0x700 [ 12.887631] ? __switch_to+0x5d9/0xf60 [ 12.887655] ? __pfx_read_tsc+0x10/0x10 [ 12.887696] ? ktime_get_ts64+0x84/0x230 [ 12.887734] kunit_try_run_case+0x1a6/0x480 [ 12.887768] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.887796] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 12.887830] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.887869] ? __kthread_parkme+0x82/0x160 [ 12.887899] ? preempt_count_sub+0x50/0x80 [ 12.888637] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.888694] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.888743] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.888794] kthread+0x257/0x310 [ 12.888831] ? __pfx_kthread+0x10/0x10 [ 12.888870] ret_from_fork+0x41/0x80 [ 12.888915] ? __pfx_kthread+0x10/0x10 [ 12.888954] ret_from_fork_asm+0x1a/0x30 [ 12.888998] </TASK> [ 12.889012] [ 12.899285] Allocated by task 218: [ 12.899628] kasan_save_stack+0x45/0x70 [ 12.899960] kasan_save_track+0x18/0x40 [ 12.900497] kasan_save_alloc_info+0x3b/0x50 [ 12.900819] __kasan_slab_alloc+0x91/0xa0 [ 12.901275] kmem_cache_alloc_noprof+0x107/0x350 [ 12.901695] kmem_cache_rcu_uaf+0x156/0x510 [ 12.901927] kunit_try_run_case+0x1a6/0x480 [ 12.902476] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.902725] kthread+0x257/0x310 [ 12.903039] ret_from_fork+0x41/0x80 [ 12.903646] ret_from_fork_asm+0x1a/0x30 [ 12.903838] [ 12.903990] Freed by task 0: [ 12.904521] kasan_save_stack+0x45/0x70 [ 12.904771] kasan_save_track+0x18/0x40 [ 12.904986] kasan_save_free_info+0x3f/0x60 [ 12.905473] __kasan_slab_free+0x56/0x70 [ 12.905804] slab_free_after_rcu_debug+0xe4/0x2f0 [ 12.906325] rcu_core+0x683/0x1c80 [ 12.906592] rcu_core_si+0x12/0x20 [ 12.906876] handle_softirqs+0x209/0x730 [ 12.907362] irq_exit_rcu+0x9c/0xd0 [ 12.907967] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.908431] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.908720] [ 12.908853] Last potentially related work creation: [ 12.909235] kasan_save_stack+0x45/0x70 [ 12.909808] __kasan_record_aux_stack+0xae/0xc0 [ 12.910157] kasan_record_aux_stack_noalloc+0xf/0x20 [ 12.910680] kmem_cache_free+0x276/0x400 [ 12.911051] kmem_cache_rcu_uaf+0x195/0x510 [ 12.911612] kunit_try_run_case+0x1a6/0x480 [ 12.911811] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.912159] kthread+0x257/0x310 [ 12.912422] ret_from_fork+0x41/0x80 [ 12.912746] ret_from_fork_asm+0x1a/0x30 [ 12.912932] [ 12.913071] The buggy address belongs to the object at ffff888102628000 [ 12.913071] which belongs to the cache test_cache of size 200 [ 12.913799] The buggy address is located 0 bytes inside of [ 12.913799] freed 200-byte region [ffff888102628000, ffff8881026280c8) [ 12.914829] [ 12.915034] The buggy address belongs to the physical page: [ 12.915721] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102628 [ 12.916417] flags: 0x200000000000000(node=0|zone=2) [ 12.916733] page_type: f5(slab) [ 12.917016] raw: 0200000000000000 ffff888102621280 dead000000000122 0000000000000000 [ 12.917362] raw: 0000000000000000 00000000800f000f 00000001f5000000 0000000000000000 [ 12.918027] page dumped because: kasan: bad access detected [ 12.918648] [ 12.918806] Memory state around the buggy address: [ 12.919114] ffff888102627f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.920009] ffff888102627f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.920433] >ffff888102628000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.920832] ^ [ 12.921016] ffff888102628080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 12.921593] ffff888102628100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.922051] ==================================================================