Date
July 12, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.977368] ================================================================== [ 16.977529] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 16.977597] Read of size 4 at addr fff00000c5931300 by task swapper/1/0 [ 16.977645] [ 16.977683] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.977766] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.977793] Hardware name: linux,dummy-virt (DT) [ 16.977823] Call trace: [ 16.977845] show_stack+0x20/0x38 (C) [ 16.977894] dump_stack_lvl+0x8c/0xd0 [ 16.977945] print_report+0x118/0x5d0 [ 16.977992] kasan_report+0xdc/0x128 [ 16.978037] __asan_report_load4_noabort+0x20/0x30 [ 16.978090] rcu_uaf_reclaim+0x64/0x70 [ 16.978134] rcu_core+0x9f4/0x1e20 [ 16.978194] rcu_core_si+0x18/0x30 [ 16.978245] handle_softirqs+0x374/0xb28 [ 16.978384] __do_softirq+0x1c/0x28 [ 16.978507] ____do_softirq+0x18/0x30 [ 16.978736] call_on_irq_stack+0x24/0x30 [ 16.978974] do_softirq_own_stack+0x24/0x38 [ 16.979020] __irq_exit_rcu+0x1fc/0x318 [ 16.979065] irq_exit_rcu+0x1c/0x80 [ 16.979115] el1_interrupt+0x38/0x58 [ 16.979435] el1h_64_irq_handler+0x18/0x28 [ 16.980146] el1h_64_irq+0x6c/0x70 [ 16.980300] arch_local_irq_enable+0x4/0x8 (P) [ 16.980357] do_idle+0x384/0x4e8 [ 16.980473] cpu_startup_entry+0x64/0x80 [ 16.980811] secondary_start_kernel+0x288/0x340 [ 16.981061] __secondary_switched+0xc0/0xc8 [ 16.981120] [ 16.981139] Allocated by task 198: [ 16.981195] kasan_save_stack+0x3c/0x68 [ 16.981240] kasan_save_track+0x20/0x40 [ 16.981277] kasan_save_alloc_info+0x40/0x58 [ 16.981468] __kasan_kmalloc+0xd4/0xd8 [ 16.981512] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.981831] rcu_uaf+0xb0/0x2d8 [ 16.981901] kunit_try_run_case+0x170/0x3f0 [ 16.981997] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.982063] kthread+0x328/0x630 [ 16.982119] ret_from_fork+0x10/0x20 [ 16.982157] [ 16.982189] Freed by task 0: [ 16.982216] kasan_save_stack+0x3c/0x68 [ 16.982496] kasan_save_track+0x20/0x40 [ 16.982605] kasan_save_free_info+0x4c/0x78 [ 16.982665] __kasan_slab_free+0x6c/0x98 [ 16.982743] kfree+0x214/0x3c8 [ 16.982851] rcu_uaf_reclaim+0x28/0x70 [ 16.982901] rcu_core+0x9f4/0x1e20 [ 16.982938] rcu_core_si+0x18/0x30 [ 16.982973] handle_softirqs+0x374/0xb28 [ 16.983010] __do_softirq+0x1c/0x28 [ 16.983045] [ 16.983078] Last potentially related work creation: [ 16.983611] kasan_save_stack+0x3c/0x68 [ 16.983720] kasan_record_aux_stack+0xb4/0xc8 [ 16.983793] __call_rcu_common.constprop.0+0x74/0x8c8 [ 16.983835] call_rcu+0x18/0x30 [ 16.984002] rcu_uaf+0x14c/0x2d8 [ 16.984201] kunit_try_run_case+0x170/0x3f0 [ 16.984285] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.984385] kthread+0x328/0x630 [ 16.984419] ret_from_fork+0x10/0x20 [ 16.984510] [ 16.984619] The buggy address belongs to the object at fff00000c5931300 [ 16.984619] which belongs to the cache kmalloc-32 of size 32 [ 16.984741] The buggy address is located 0 bytes inside of [ 16.984741] freed 32-byte region [fff00000c5931300, fff00000c5931320) [ 16.984852] [ 16.984948] The buggy address belongs to the physical page: [ 16.985051] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105931 [ 16.985122] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.985213] page_type: f5(slab) [ 16.985308] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 16.985449] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 16.985498] page dumped because: kasan: bad access detected [ 16.985641] [ 16.985660] Memory state around the buggy address: [ 16.985696] fff00000c5931200: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 16.985782] fff00000c5931280: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 16.985891] >fff00000c5931300: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 16.986023] ^ [ 16.986128] fff00000c5931380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.986457] fff00000c5931400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.986842] ==================================================================
[ 13.547144] ================================================================== [ 13.547615] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 13.547941] Read of size 4 at addr ffff888103a4fac0 by task swapper/0/0 [ 13.548240] [ 13.548382] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.548424] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.548436] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.548458] Call Trace: [ 13.548490] <IRQ> [ 13.548505] dump_stack_lvl+0x73/0xb0 [ 13.548536] print_report+0xd1/0x610 [ 13.548584] ? __virt_addr_valid+0x1db/0x2d0 [ 13.548608] ? rcu_uaf_reclaim+0x50/0x60 [ 13.548628] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.548651] ? rcu_uaf_reclaim+0x50/0x60 [ 13.548671] kasan_report+0x141/0x180 [ 13.548693] ? rcu_uaf_reclaim+0x50/0x60 [ 13.548717] __asan_report_load4_noabort+0x18/0x20 [ 13.548850] rcu_uaf_reclaim+0x50/0x60 [ 13.548871] rcu_core+0x66f/0x1c40 [ 13.548922] ? __pfx_rcu_core+0x10/0x10 [ 13.548944] ? ktime_get+0x6b/0x150 [ 13.548964] ? handle_softirqs+0x18e/0x730 [ 13.548999] rcu_core_si+0x12/0x20 [ 13.549018] handle_softirqs+0x209/0x730 [ 13.549047] ? hrtimer_interrupt+0x2fe/0x780 [ 13.549069] ? __pfx_handle_softirqs+0x10/0x10 [ 13.549094] __irq_exit_rcu+0xc9/0x110 [ 13.549114] irq_exit_rcu+0x12/0x20 [ 13.549134] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.549160] </IRQ> [ 13.549186] <TASK> [ 13.549222] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.549339] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 13.549605] 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 71 21 00 fb f4 <e9> 3c 1d 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 [ 13.549691] RSP: 0000:ffffffff8e607dd8 EFLAGS: 00010212 [ 13.549777] RAX: ffff8881cb672000 RBX: ffffffff8e61cac0 RCX: ffffffff8d475125 [ 13.549823] RDX: ffffed102b60618b RSI: 0000000000000004 RDI: 000000000001819c [ 13.549865] RBP: ffffffff8e607de0 R08: 0000000000000001 R09: ffffed102b60618a [ 13.549909] R10: ffff88815b030c53 R11: 000000000000ac00 R12: 0000000000000000 [ 13.549952] R13: fffffbfff1cc3958 R14: ffffffff8f1b1490 R15: 0000000000000000 [ 13.550024] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 13.550104] ? default_idle+0xd/0x20 [ 13.550127] arch_cpu_idle+0xd/0x20 [ 13.550148] default_idle_call+0x48/0x80 [ 13.550167] do_idle+0x379/0x4f0 [ 13.550194] ? __pfx_do_idle+0x10/0x10 [ 13.550215] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.550239] ? trace_preempt_on+0x20/0xc0 [ 13.550271] ? schedule+0x86/0x2e0 [ 13.550291] ? preempt_count_sub+0x50/0x80 [ 13.550314] cpu_startup_entry+0x5c/0x70 [ 13.550334] rest_init+0x11a/0x140 [ 13.550351] ? acpi_subsystem_init+0x5d/0x150 [ 13.550376] start_kernel+0x330/0x410 [ 13.550401] x86_64_start_reservations+0x1c/0x30 [ 13.550426] x86_64_start_kernel+0x10d/0x120 [ 13.550450] common_startup_64+0x13e/0x148 [ 13.550482] </TASK> [ 13.550492] [ 13.566131] Allocated by task 215: [ 13.566325] kasan_save_stack+0x45/0x70 [ 13.566523] kasan_save_track+0x18/0x40 [ 13.566707] kasan_save_alloc_info+0x3b/0x50 [ 13.566902] __kasan_kmalloc+0xb7/0xc0 [ 13.567678] __kmalloc_cache_noprof+0x189/0x420 [ 13.567956] rcu_uaf+0xb0/0x330 [ 13.568228] kunit_try_run_case+0x1a5/0x480 [ 13.568439] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.568664] kthread+0x337/0x6f0 [ 13.568822] ret_from_fork+0x116/0x1d0 [ 13.569052] ret_from_fork_asm+0x1a/0x30 [ 13.569236] [ 13.569334] Freed by task 0: [ 13.569471] kasan_save_stack+0x45/0x70 [ 13.569647] kasan_save_track+0x18/0x40 [ 13.569826] kasan_save_free_info+0x3f/0x60 [ 13.570241] __kasan_slab_free+0x56/0x70 [ 13.570455] kfree+0x222/0x3f0 [ 13.570604] rcu_uaf_reclaim+0x1f/0x60 [ 13.570777] rcu_core+0x66f/0x1c40 [ 13.570926] rcu_core_si+0x12/0x20 [ 13.571168] handle_softirqs+0x209/0x730 [ 13.571367] __irq_exit_rcu+0xc9/0x110 [ 13.571541] irq_exit_rcu+0x12/0x20 [ 13.571704] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.571903] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.572170] [ 13.572299] Last potentially related work creation: [ 13.572521] kasan_save_stack+0x45/0x70 [ 13.572702] kasan_record_aux_stack+0xb2/0xc0 [ 13.572899] __call_rcu_common.constprop.0+0x7b/0x9e0 [ 13.573338] call_rcu+0x12/0x20 [ 13.573489] rcu_uaf+0x168/0x330 [ 13.573644] kunit_try_run_case+0x1a5/0x480 [ 13.573829] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.574192] kthread+0x337/0x6f0 [ 13.574368] ret_from_fork+0x116/0x1d0 [ 13.574540] ret_from_fork_asm+0x1a/0x30 [ 13.574738] [ 13.574836] The buggy address belongs to the object at ffff888103a4fac0 [ 13.574836] which belongs to the cache kmalloc-32 of size 32 [ 13.575572] The buggy address is located 0 bytes inside of [ 13.575572] freed 32-byte region [ffff888103a4fac0, ffff888103a4fae0) [ 13.576135] [ 13.576231] The buggy address belongs to the physical page: [ 13.576474] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103a4f [ 13.576799] flags: 0x200000000000000(node=0|zone=2) [ 13.577057] page_type: f5(slab) [ 13.577224] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.577539] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.577839] page dumped because: kasan: bad access detected [ 13.578124] [ 13.578212] Memory state around the buggy address: [ 13.578430] ffff888103a4f980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.578724] ffff888103a4fa00: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 13.579081] >ffff888103a4fa80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.579378] ^ [ 13.579601] ffff888103a4fb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.579875] ffff888103a4fb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.580206] ==================================================================