Date
June 25, 2025, 8:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 27.968410] ================================================================== [ 27.968505] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468 [ 27.968585] Read of size 1 at addr fff00000c78ed000 by task kunit_try_catch/225 [ 27.968637] [ 27.968678] CPU: 0 UID: 0 PID: 225 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT [ 27.968763] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.968790] Hardware name: linux,dummy-virt (DT) [ 27.968824] Call trace: [ 27.968848] show_stack+0x20/0x38 (C) [ 27.968902] dump_stack_lvl+0x8c/0xd0 [ 27.968959] print_report+0x118/0x608 [ 27.969006] kasan_report+0xdc/0x128 [ 27.969052] __asan_report_load1_noabort+0x20/0x30 [ 27.969100] kmem_cache_rcu_uaf+0x388/0x468 [ 27.969146] kunit_try_run_case+0x170/0x3f0 [ 27.969197] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.969251] kthread+0x328/0x630 [ 27.969294] ret_from_fork+0x10/0x20 [ 27.969345] [ 27.969363] Allocated by task 225: [ 27.969392] kasan_save_stack+0x3c/0x68 [ 27.969444] kasan_save_track+0x20/0x40 [ 27.969482] kasan_save_alloc_info+0x40/0x58 [ 27.969518] __kasan_slab_alloc+0xa8/0xb0 [ 27.969556] kmem_cache_alloc_noprof+0x10c/0x398 [ 27.969598] kmem_cache_rcu_uaf+0x12c/0x468 [ 27.969636] kunit_try_run_case+0x170/0x3f0 [ 27.969672] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.969716] kthread+0x328/0x630 [ 27.969746] ret_from_fork+0x10/0x20 [ 27.969784] [ 27.969802] Freed by task 0: [ 27.969829] kasan_save_stack+0x3c/0x68 [ 27.969865] kasan_save_track+0x20/0x40 [ 27.969902] kasan_save_free_info+0x4c/0x78 [ 27.969936] __kasan_slab_free+0x6c/0x98 [ 27.969974] slab_free_after_rcu_debug+0xd4/0x2f8 [ 27.970013] rcu_core+0x9f4/0x1e20 [ 27.970051] rcu_core_si+0x18/0x30 [ 27.970096] handle_softirqs+0x374/0xb28 [ 27.970132] __do_softirq+0x1c/0x28 [ 27.970166] [ 27.970185] Last potentially related work creation: [ 27.970211] kasan_save_stack+0x3c/0x68 [ 27.970248] kasan_record_aux_stack+0xb4/0xc8 [ 27.970285] kmem_cache_free+0x120/0x468 [ 27.970322] kmem_cache_rcu_uaf+0x16c/0x468 [ 27.970358] kunit_try_run_case+0x170/0x3f0 [ 27.970405] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.970447] kthread+0x328/0x630 [ 27.970482] ret_from_fork+0x10/0x20 [ 27.970516] [ 27.970535] The buggy address belongs to the object at fff00000c78ed000 [ 27.970535] which belongs to the cache test_cache of size 200 [ 27.970591] The buggy address is located 0 bytes inside of [ 27.970591] freed 200-byte region [fff00000c78ed000, fff00000c78ed0c8) [ 27.970653] [ 27.970676] The buggy address belongs to the physical page: [ 27.970710] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078ed [ 27.970765] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 27.970818] page_type: f5(slab) [ 27.970859] raw: 0bfffe0000000000 fff00000c790a140 dead000000000122 0000000000000000 [ 27.970909] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 27.970951] page dumped because: kasan: bad access detected [ 27.970984] [ 27.971003] Memory state around the buggy address: [ 27.971036] fff00000c78ecf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.971080] fff00000c78ecf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.971123] >fff00000c78ed000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.971161] ^ [ 27.971188] fff00000c78ed080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 27.971230] fff00000c78ed100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.971269] ==================================================================
[ 22.643210] ================================================================== [ 22.643668] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.644199] Read of size 1 at addr ffff888103ac1000 by task kunit_try_catch/242 [ 22.644496] [ 22.644588] CPU: 1 UID: 0 PID: 242 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc3-next-20250625 #1 PREEMPT(voluntary) [ 22.644641] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.644654] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.644676] Call Trace: [ 22.644690] <TASK> [ 22.644709] dump_stack_lvl+0x73/0xb0 [ 22.644739] print_report+0xd1/0x650 [ 22.644761] ? __virt_addr_valid+0x1db/0x2d0 [ 22.644787] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.644809] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.644835] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.644858] kasan_report+0x141/0x180 [ 22.644881] ? kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.644914] __asan_report_load1_noabort+0x18/0x20 [ 22.644937] kmem_cache_rcu_uaf+0x3e3/0x510 [ 22.644973] ? __pfx_kmem_cache_rcu_uaf+0x10/0x10 [ 22.644994] ? finish_task_switch.isra.0+0x153/0x700 [ 22.645016] ? __switch_to+0x47/0xf50 [ 22.645052] ? __pfx_read_tsc+0x10/0x10 [ 22.645073] ? ktime_get_ts64+0x86/0x230 [ 22.645103] kunit_try_run_case+0x1a5/0x480 [ 22.645130] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.645151] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.645173] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.645199] ? __kthread_parkme+0x82/0x180 [ 22.645220] ? preempt_count_sub+0x50/0x80 [ 22.645246] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.645270] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.645294] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.645316] kthread+0x337/0x6f0 [ 22.645335] ? trace_preempt_on+0x20/0xc0 [ 22.645360] ? __pfx_kthread+0x10/0x10 [ 22.645381] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.645403] ? calculate_sigpending+0x7b/0xa0 [ 22.645428] ? __pfx_kthread+0x10/0x10 [ 22.645451] ret_from_fork+0x116/0x1d0 [ 22.645468] ? __pfx_kthread+0x10/0x10 [ 22.645489] ret_from_fork_asm+0x1a/0x30 [ 22.645530] </TASK> [ 22.645540] [ 22.653069] Allocated by task 242: [ 22.653318] kasan_save_stack+0x45/0x70 [ 22.653529] kasan_save_track+0x18/0x40 [ 22.653674] kasan_save_alloc_info+0x3b/0x50 [ 22.653935] __kasan_slab_alloc+0x91/0xa0 [ 22.654340] kmem_cache_alloc_noprof+0x123/0x3f0 [ 22.654527] kmem_cache_rcu_uaf+0x155/0x510 [ 22.654726] kunit_try_run_case+0x1a5/0x480 [ 22.655140] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.655319] kthread+0x337/0x6f0 [ 22.655432] ret_from_fork+0x116/0x1d0 [ 22.655571] ret_from_fork_asm+0x1a/0x30 [ 22.655757] [ 22.655841] Freed by task 0: [ 22.656065] kasan_save_stack+0x45/0x70 [ 22.656335] kasan_save_track+0x18/0x40 [ 22.656677] kasan_save_free_info+0x3f/0x60 [ 22.657384] __kasan_slab_free+0x56/0x70 [ 22.657527] slab_free_after_rcu_debug+0xe4/0x310 [ 22.657730] rcu_core+0x66f/0x1c40 [ 22.658470] rcu_core_si+0x12/0x20 [ 22.658644] handle_softirqs+0x209/0x730 [ 22.658792] __irq_exit_rcu+0xc9/0x110 [ 22.659656] irq_exit_rcu+0x12/0x20 [ 22.659964] sysvec_apic_timer_interrupt+0x81/0x90 [ 22.660216] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 22.660672] [ 22.660791] Last potentially related work creation: [ 22.661278] kasan_save_stack+0x45/0x70 [ 22.661441] kasan_record_aux_stack+0xb2/0xc0 [ 22.661773] kmem_cache_free+0x131/0x420 [ 22.662025] kmem_cache_rcu_uaf+0x194/0x510 [ 22.662435] kunit_try_run_case+0x1a5/0x480 [ 22.662634] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.663110] kthread+0x337/0x6f0 [ 22.663368] ret_from_fork+0x116/0x1d0 [ 22.663568] ret_from_fork_asm+0x1a/0x30 [ 22.663773] [ 22.663859] The buggy address belongs to the object at ffff888103ac1000 [ 22.663859] which belongs to the cache test_cache of size 200 [ 22.664604] The buggy address is located 0 bytes inside of [ 22.664604] freed 200-byte region [ffff888103ac1000, ffff888103ac10c8) [ 22.665289] [ 22.665389] The buggy address belongs to the physical page: [ 22.665630] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103ac1 [ 22.666044] flags: 0x200000000000000(node=0|zone=2) [ 22.666530] page_type: f5(slab) [ 22.666670] raw: 0200000000000000 ffff888103ae5140 dead000000000122 0000000000000000 [ 22.667389] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 22.667705] page dumped because: kasan: bad access detected [ 22.668340] [ 22.668428] Memory state around the buggy address: [ 22.668867] ffff888103ac0f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.669374] ffff888103ac0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.669660] >ffff888103ac1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.670285] ^ [ 22.670432] ffff888103ac1080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 22.671053] ffff888103ac1100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.671396] ==================================================================