Date
May 15, 2025, 10:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.262437] ================================================================== [ 19.262543] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 19.262625] Read of size 1 at addr fff00000c6891000 by task kunit_try_catch/213 [ 19.262676] [ 19.262721] CPU: 0 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT [ 19.262816] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.262843] Hardware name: linux,dummy-virt (DT) [ 19.262878] Call trace: [ 19.262902] show_stack+0x20/0x38 (C) [ 19.262955] dump_stack_lvl+0x8c/0xd0 [ 19.263006] print_report+0x118/0x608 [ 19.263053] kasan_report+0xdc/0x128 [ 19.263099] __asan_report_load1_noabort+0x20/0x30 [ 19.263149] kmem_cache_rcu_uaf+0x388/0x468 [ 19.263210] kunit_try_run_case+0x170/0x3f0 [ 19.263259] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.263311] kthread+0x328/0x630 [ 19.263360] ret_from_fork+0x10/0x20 [ 19.263409] [ 19.263429] Allocated by task 213: [ 19.263458] kasan_save_stack+0x3c/0x68 [ 19.263499] kasan_save_track+0x20/0x40 [ 19.263535] kasan_save_alloc_info+0x40/0x58 [ 19.263575] __kasan_slab_alloc+0xa8/0xb0 [ 19.263610] kmem_cache_alloc_noprof+0x10c/0x3a0 [ 19.263651] kmem_cache_rcu_uaf+0x12c/0x468 [ 19.263688] kunit_try_run_case+0x170/0x3f0 [ 19.263725] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.263765] kthread+0x328/0x630 [ 19.263801] ret_from_fork+0x10/0x20 [ 19.263835] [ 19.263854] Freed by task 0: [ 19.263882] kasan_save_stack+0x3c/0x68 [ 19.263920] kasan_save_track+0x20/0x40 [ 19.263955] kasan_save_free_info+0x4c/0x78 [ 19.263994] __kasan_slab_free+0x6c/0x98 [ 19.264029] slab_free_after_rcu_debug+0xd4/0x2f8 [ 19.264067] rcu_core+0x9f4/0x1e20 [ 19.264103] rcu_core_si+0x18/0x30 [ 19.264137] handle_softirqs+0x374/0xb28 [ 19.264182] __do_softirq+0x1c/0x28 [ 19.264217] [ 19.264237] Last potentially related work creation: [ 19.264263] kasan_save_stack+0x3c/0x68 [ 19.264299] kasan_record_aux_stack+0xb4/0xc8 [ 19.264339] kmem_cache_free+0x120/0x470 [ 19.264375] kmem_cache_rcu_uaf+0x16c/0x468 [ 19.264413] kunit_try_run_case+0x170/0x3f0 [ 19.264449] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.264491] kthread+0x328/0x630 [ 19.264527] ret_from_fork+0x10/0x20 [ 19.264562] [ 19.264580] The buggy address belongs to the object at fff00000c6891000 [ 19.264580] which belongs to the cache test_cache of size 200 [ 19.264638] The buggy address is located 0 bytes inside of [ 19.264638] freed 200-byte region [fff00000c6891000, fff00000c68910c8) [ 19.264699] [ 19.264722] The buggy address belongs to the physical page: [ 19.264756] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106891 [ 19.264813] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.264866] page_type: f5(slab) [ 19.264909] raw: 0bfffe0000000000 fff00000c17363c0 dead000000000122 0000000000000000 [ 19.264958] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 19.264999] page dumped because: kasan: bad access detected [ 19.265030] [ 19.265050] Memory state around the buggy address: [ 19.265083] fff00000c6890f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.265125] fff00000c6890f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.265178] >fff00000c6891000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.265215] ^ [ 19.265243] fff00000c6891080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 19.265285] fff00000c6891100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.265323] ==================================================================
[ 14.962943] ================================================================== [ 14.963524] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.964518] Read of size 1 at addr ffff888102316000 by task kunit_try_catch/231 [ 14.964942] [ 14.965098] CPU: 1 UID: 0 PID: 231 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250515 #1 PREEMPT(voluntary) [ 14.965315] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.965337] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.965381] Call Trace: [ 14.965409] <TASK> [ 14.965444] dump_stack_lvl+0x73/0xb0 [ 14.965522] print_report+0xd1/0x650 [ 14.965570] ? __virt_addr_valid+0x1db/0x2d0 [ 14.965612] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.965647] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.966101] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.966129] kasan_report+0x141/0x180 [ 14.966153] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.966179] __asan_report_load1_noabort+0x18/0x20 [ 14.966198] kmem_cache_rcu_uaf+0x3e3/0x510 [ 14.966238] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 14.966266] ? finish_task_switch.isra.0+0x153/0x700 [ 14.966292] ? __switch_to+0x47/0xf50 [ 14.966321] ? __pfx_read_tsc+0x10/0x10 [ 14.966354] ? ktime_get_ts64+0x86/0x230 [ 14.966381] kunit_try_run_case+0x1a5/0x480 [ 14.966409] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.966430] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.966858] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.966886] ? __kthread_parkme+0x82/0x180 [ 14.966911] ? preempt_count_sub+0x50/0x80 [ 14.966935] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.966957] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.966979] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.967001] kthread+0x337/0x6f0 [ 14.967021] ? trace_preempt_on+0x20/0xc0 [ 14.967045] ? __pfx_kthread+0x10/0x10 [ 14.967064] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.967085] ? calculate_sigpending+0x7b/0xa0 [ 14.967109] ? __pfx_kthread+0x10/0x10 [ 14.967130] ret_from_fork+0x116/0x1d0 [ 14.967148] ? __pfx_kthread+0x10/0x10 [ 14.967168] ret_from_fork_asm+0x1a/0x30 [ 14.967200] </TASK> [ 14.967213] [ 14.977464] Allocated by task 231: [ 14.977900] kasan_save_stack+0x45/0x70 [ 14.978273] kasan_save_track+0x18/0x40 [ 14.978765] kasan_save_alloc_info+0x3b/0x50 [ 14.979049] __kasan_slab_alloc+0x91/0xa0 [ 14.979235] kmem_cache_alloc_noprof+0x123/0x3f0 [ 14.979629] kmem_cache_rcu_uaf+0x155/0x510 [ 14.980557] kunit_try_run_case+0x1a5/0x480 [ 14.981239] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.981839] kthread+0x337/0x6f0 [ 14.982094] ret_from_fork+0x116/0x1d0 [ 14.982361] ret_from_fork_asm+0x1a/0x30 [ 14.982605] [ 14.982762] Freed by task 0: [ 14.982945] kasan_save_stack+0x45/0x70 [ 14.983869] kasan_save_track+0x18/0x40 [ 14.984200] kasan_save_free_info+0x3f/0x60 [ 14.984922] __kasan_slab_free+0x56/0x70 [ 14.985191] slab_free_after_rcu_debug+0xe4/0x310 [ 14.985688] rcu_core+0x66f/0x1c40 [ 14.985877] rcu_core_si+0x12/0x20 [ 14.986161] handle_softirqs+0x209/0x730 [ 14.986404] __irq_exit_rcu+0xc9/0x110 [ 14.986573] irq_exit_rcu+0x12/0x20 [ 14.986754] sysvec_apic_timer_interrupt+0x81/0x90 [ 14.987201] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 14.987726] [ 14.988295] Last potentially related work creation: [ 14.988570] kasan_save_stack+0x45/0x70 [ 14.989094] kasan_record_aux_stack+0xb2/0xc0 [ 14.989338] kmem_cache_free+0x131/0x420 [ 14.989670] kmem_cache_rcu_uaf+0x194/0x510 [ 14.990194] kunit_try_run_case+0x1a5/0x480 [ 14.990410] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.990915] kthread+0x337/0x6f0 [ 14.991088] ret_from_fork+0x116/0x1d0 [ 14.991363] ret_from_fork_asm+0x1a/0x30 [ 14.992057] [ 14.992263] The buggy address belongs to the object at ffff888102316000 [ 14.992263] which belongs to the cache test_cache of size 200 [ 14.992848] The buggy address is located 0 bytes inside of [ 14.992848] freed 200-byte region [ffff888102316000, ffff8881023160c8) [ 14.993667] [ 14.993786] The buggy address belongs to the physical page: [ 14.994431] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102316 [ 14.994836] flags: 0x200000000000000(node=0|zone=2) [ 14.995121] page_type: f5(slab) [ 14.995333] raw: 0200000000000000 ffff888102312140 dead000000000122 0000000000000000 [ 14.996259] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 14.996530] page dumped because: kasan: bad access detected [ 14.996894] [ 14.997049] Memory state around the buggy address: [ 14.997544] ffff888102315f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.998125] ffff888102315f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.998636] >ffff888102316000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.999054] ^ [ 14.999397] ffff888102316080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 15.000230] ffff888102316100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.000672] ==================================================================