Date
July 9, 2025, 1:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.696142] ================================================================== [ 29.696270] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 29.696342] Read of size 4 at addr fff00000c5999d00 by task swapper/0/0 [ 29.696389] [ 29.696429] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc5-next-20250709 #1 PREEMPT [ 29.696515] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.696543] Hardware name: linux,dummy-virt (DT) [ 29.696574] Call trace: [ 29.696599] show_stack+0x20/0x38 (C) [ 29.696649] dump_stack_lvl+0x8c/0xd0 [ 29.696698] print_report+0x118/0x5d0 [ 29.696742] kasan_report+0xdc/0x128 [ 29.696783] __asan_report_load4_noabort+0x20/0x30 [ 29.696832] rcu_uaf_reclaim+0x64/0x70 [ 29.696875] rcu_core+0x9f4/0x1e20 [ 29.696922] rcu_core_si+0x18/0x30 [ 29.696965] handle_softirqs+0x374/0xb28 [ 29.697013] __do_softirq+0x1c/0x28 [ 29.697066] ____do_softirq+0x18/0x30 [ 29.697113] call_on_irq_stack+0x24/0x30 [ 29.697158] do_softirq_own_stack+0x24/0x38 [ 29.697203] __irq_exit_rcu+0x1fc/0x318 [ 29.697248] irq_exit_rcu+0x1c/0x80 [ 29.697290] el1_interrupt+0x38/0x58 [ 29.697334] el1h_64_irq_handler+0x18/0x28 [ 29.697379] el1h_64_irq+0x6c/0x70 [ 29.697484] arch_local_irq_enable+0x4/0x8 (P) [ 29.697535] do_idle+0x384/0x4e8 [ 29.697580] cpu_startup_entry+0x68/0x80 [ 29.697626] rest_init+0x160/0x188 [ 29.697668] start_kernel+0x30c/0x3d0 [ 29.697718] __primary_switched+0x8c/0xa0 [ 29.697770] [ 29.697789] Allocated by task 230: [ 29.697820] kasan_save_stack+0x3c/0x68 [ 29.697861] kasan_save_track+0x20/0x40 [ 29.697901] kasan_save_alloc_info+0x40/0x58 [ 29.697937] __kasan_kmalloc+0xd4/0xd8 [ 29.697975] __kmalloc_cache_noprof+0x16c/0x3c0 [ 29.698016] rcu_uaf+0xb0/0x2d8 [ 29.698051] kunit_try_run_case+0x170/0x3f0 [ 29.698177] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.698224] kthread+0x328/0x630 [ 29.698258] ret_from_fork+0x10/0x20 [ 29.698292] [ 29.698310] Freed by task 0: [ 29.698336] kasan_save_stack+0x3c/0x68 [ 29.698373] kasan_save_track+0x20/0x40 [ 29.698442] kasan_save_free_info+0x4c/0x78 [ 29.698478] __kasan_slab_free+0x6c/0x98 [ 29.698517] kfree+0x214/0x3c8 [ 29.698550] rcu_uaf_reclaim+0x28/0x70 [ 29.698585] rcu_core+0x9f4/0x1e20 [ 29.698619] rcu_core_si+0x18/0x30 [ 29.698693] handle_softirqs+0x374/0xb28 [ 29.698730] __do_softirq+0x1c/0x28 [ 29.698765] [ 29.698792] Last potentially related work creation: [ 29.698827] kasan_save_stack+0x3c/0x68 [ 29.698938] kasan_record_aux_stack+0xb4/0xc8 [ 29.699035] __call_rcu_common.constprop.0+0x74/0x8c8 [ 29.699089] call_rcu+0x18/0x30 [ 29.699159] rcu_uaf+0x14c/0x2d8 [ 29.699194] kunit_try_run_case+0x170/0x3f0 [ 29.699245] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.699291] kthread+0x328/0x630 [ 29.699325] ret_from_fork+0x10/0x20 [ 29.699376] [ 29.699410] The buggy address belongs to the object at fff00000c5999d00 [ 29.699410] which belongs to the cache kmalloc-32 of size 32 [ 29.699472] The buggy address is located 0 bytes inside of [ 29.699472] freed 32-byte region [fff00000c5999d00, fff00000c5999d20) [ 29.699533] [ 29.699562] The buggy address belongs to the physical page: [ 29.699605] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105999 [ 29.699660] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.699711] page_type: f5(slab) [ 29.699752] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 29.699802] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 29.699843] page dumped because: kasan: bad access detected [ 29.699874] [ 29.699891] Memory state around the buggy address: [ 29.699925] fff00000c5999c00: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 29.699977] fff00000c5999c80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 29.700019] >fff00000c5999d00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 29.700068] ^ [ 29.700095] fff00000c5999d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.700135] fff00000c5999e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.700196] ==================================================================
[ 24.641999] ================================================================== [ 24.642446] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 24.642832] Read of size 4 at addr ffff8881058cf540 by task swapper/0/0 [ 24.643186] [ 24.643280] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B W N 6.16.0-rc5-next-20250709 #1 PREEMPT(voluntary) [ 24.643334] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 24.643348] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.643394] Call Trace: [ 24.643422] <IRQ> [ 24.643442] dump_stack_lvl+0x73/0xb0 [ 24.643475] print_report+0xd1/0x610 [ 24.643498] ? __virt_addr_valid+0x1db/0x2d0 [ 24.643522] ? rcu_uaf_reclaim+0x50/0x60 [ 24.643562] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.643590] ? rcu_uaf_reclaim+0x50/0x60 [ 24.643610] kasan_report+0x141/0x180 [ 24.643632] ? rcu_uaf_reclaim+0x50/0x60 [ 24.643656] __asan_report_load4_noabort+0x18/0x20 [ 24.643679] rcu_uaf_reclaim+0x50/0x60 [ 24.643710] rcu_core+0x66f/0x1c40 [ 24.643739] ? __pfx_rcu_core+0x10/0x10 [ 24.643780] ? ktime_get+0x6b/0x150 [ 24.643807] rcu_core_si+0x12/0x20 [ 24.643848] handle_softirqs+0x209/0x730 [ 24.643888] ? hrtimer_interrupt+0x2fe/0x780 [ 24.643911] ? __pfx_handle_softirqs+0x10/0x10 [ 24.643936] __irq_exit_rcu+0xc9/0x110 [ 24.643967] irq_exit_rcu+0x12/0x20 [ 24.643988] sysvec_apic_timer_interrupt+0x81/0x90 [ 24.644014] </IRQ> [ 24.644024] <TASK> [ 24.644036] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 24.644109] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 24.644139] Code: 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d c3 af 19 00 fb f4 <e9> 7c 1d 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 [ 24.644183] RSP: 0000:ffffffff92a07dd8 EFLAGS: 00010206 [ 24.644217] RAX: ffff8881c722b000 RBX: ffffffff92a1cb00 RCX: ffffffff918f0a25 [ 24.644237] RDX: ffffed102b606193 RSI: 0000000000000004 RDI: 0000000000176ff4 [ 24.644256] RBP: ffffffff92a07de0 R08: 0000000000000001 R09: ffffed102b606192 [ 24.644274] R10: ffff88815b030c93 R11: ffffffff93e0a700 R12: 0000000000000000 [ 24.644293] R13: fffffbfff2543960 R14: ffffffff935e8bd0 R15: 0000000000000000 [ 24.644342] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 24.644395] ? default_idle+0xd/0x20 [ 24.644414] arch_cpu_idle+0xd/0x20 [ 24.644432] default_idle_call+0x48/0x80 [ 24.644451] do_idle+0x379/0x4f0 [ 24.644476] ? __pfx_do_idle+0x10/0x10 [ 24.644504] cpu_startup_entry+0x5c/0x70 [ 24.644526] rest_init+0x11a/0x140 [ 24.644545] ? acpi_subsystem_init+0x5d/0x150 [ 24.644572] start_kernel+0x352/0x400 [ 24.644595] x86_64_start_reservations+0x1c/0x30 [ 24.644617] x86_64_start_kernel+0x10d/0x120 [ 24.644640] common_startup_64+0x13e/0x148 [ 24.644672] </TASK> [ 24.644683] [ 24.654708] Allocated by task 248: [ 24.654926] kasan_save_stack+0x45/0x70 [ 24.655127] kasan_save_track+0x18/0x40 [ 24.655260] kasan_save_alloc_info+0x3b/0x50 [ 24.655400] __kasan_kmalloc+0xb7/0xc0 [ 24.655577] __kmalloc_cache_noprof+0x189/0x420 [ 24.656015] rcu_uaf+0xb0/0x330 [ 24.656192] kunit_try_run_case+0x1a5/0x480 [ 24.656386] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.656602] kthread+0x337/0x6f0 [ 24.656806] ret_from_fork+0x116/0x1d0 [ 24.657166] ret_from_fork_asm+0x1a/0x30 [ 24.657389] [ 24.657468] Freed by task 0: [ 24.657585] kasan_save_stack+0x45/0x70 [ 24.657729] kasan_save_track+0x18/0x40 [ 24.657861] kasan_save_free_info+0x3f/0x60 [ 24.658161] __kasan_slab_free+0x56/0x70 [ 24.658351] kfree+0x222/0x3f0 [ 24.658506] rcu_uaf_reclaim+0x1f/0x60 [ 24.658686] rcu_core+0x66f/0x1c40 [ 24.658894] rcu_core_si+0x12/0x20 [ 24.659063] handle_softirqs+0x209/0x730 [ 24.659344] __irq_exit_rcu+0xc9/0x110 [ 24.659527] irq_exit_rcu+0x12/0x20 [ 24.659676] sysvec_apic_timer_interrupt+0x81/0x90 [ 24.659950] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 24.660181] [ 24.660291] Last potentially related work creation: [ 24.660554] kasan_save_stack+0x45/0x70 [ 24.660782] kasan_record_aux_stack+0xb2/0xc0 [ 24.660994] __call_rcu_common.constprop.0+0x7b/0x9e0 [ 24.661464] call_rcu+0x12/0x20 [ 24.661603] rcu_uaf+0x168/0x330 [ 24.661734] kunit_try_run_case+0x1a5/0x480 [ 24.662028] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.662306] kthread+0x337/0x6f0 [ 24.662470] ret_from_fork+0x116/0x1d0 [ 24.662607] ret_from_fork_asm+0x1a/0x30 [ 24.662767] [ 24.662851] The buggy address belongs to the object at ffff8881058cf540 [ 24.662851] which belongs to the cache kmalloc-32 of size 32 [ 24.663455] The buggy address is located 0 bytes inside of [ 24.663455] freed 32-byte region [ffff8881058cf540, ffff8881058cf560) [ 24.664120] [ 24.664197] The buggy address belongs to the physical page: [ 24.664360] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058cf [ 24.664712] flags: 0x200000000000000(node=0|zone=2) [ 24.665129] page_type: f5(slab) [ 24.665322] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 24.665629] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 24.665935] page dumped because: kasan: bad access detected [ 24.666190] [ 24.666305] Memory state around the buggy address: [ 24.666525] ffff8881058cf400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.666948] ffff8881058cf480: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 24.667194] >ffff8881058cf500: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 24.667489] ^ [ 24.667717] ffff8881058cf580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.667965] ffff8881058cf600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.668272] ==================================================================