Date
July 8, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.749383] ================================================================== [ 19.749776] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 19.749962] Read of size 4 at addr fff00000c63d9600 by task swapper/1/0 [ 19.750128] [ 19.750548] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.750741] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.750767] Hardware name: linux,dummy-virt (DT) [ 19.751003] Call trace: [ 19.751095] show_stack+0x20/0x38 (C) [ 19.751225] dump_stack_lvl+0x8c/0xd0 [ 19.751275] print_report+0x118/0x608 [ 19.751321] kasan_report+0xdc/0x128 [ 19.751367] __asan_report_load4_noabort+0x20/0x30 [ 19.751419] rcu_uaf_reclaim+0x64/0x70 [ 19.751462] rcu_core+0x9f4/0x1e20 [ 19.751714] rcu_core_si+0x18/0x30 [ 19.752012] handle_softirqs+0x374/0xb28 [ 19.752389] __do_softirq+0x1c/0x28 [ 19.752434] ____do_softirq+0x18/0x30 [ 19.752479] call_on_irq_stack+0x24/0x30 [ 19.752523] do_softirq_own_stack+0x24/0x38 [ 19.752569] __irq_exit_rcu+0x1fc/0x318 [ 19.752614] irq_exit_rcu+0x1c/0x80 [ 19.753258] el1_interrupt+0x38/0x58 [ 19.753572] el1h_64_irq_handler+0x18/0x28 [ 19.753734] el1h_64_irq+0x6c/0x70 [ 19.754174] finish_task_switch.isra.0+0x120/0x5e8 (P) [ 19.754252] __schedule+0xab4/0x2840 [ 19.754603] schedule_idle+0x60/0xa8 [ 19.754648] do_idle+0x2c4/0x4e8 [ 19.754861] cpu_startup_entry+0x64/0x80 [ 19.754918] secondary_start_kernel+0x288/0x340 [ 19.755005] __secondary_switched+0xc0/0xc8 [ 19.755060] [ 19.755078] Allocated by task 198: [ 19.755143] kasan_save_stack+0x3c/0x68 [ 19.755196] kasan_save_track+0x20/0x40 [ 19.755233] kasan_save_alloc_info+0x40/0x58 [ 19.755352] __kasan_kmalloc+0xd4/0xd8 [ 19.755520] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.755794] rcu_uaf+0xb0/0x2d8 [ 19.755958] kunit_try_run_case+0x170/0x3f0 [ 19.756073] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.756129] kthread+0x328/0x630 [ 19.756279] ret_from_fork+0x10/0x20 [ 19.756314] [ 19.756335] Freed by task 0: [ 19.756360] kasan_save_stack+0x3c/0x68 [ 19.756533] kasan_save_track+0x20/0x40 [ 19.756573] kasan_save_free_info+0x4c/0x78 [ 19.756697] __kasan_slab_free+0x6c/0x98 [ 19.756759] kfree+0x214/0x3c8 [ 19.756819] rcu_uaf_reclaim+0x28/0x70 [ 19.756926] rcu_core+0x9f4/0x1e20 [ 19.756962] rcu_core_si+0x18/0x30 [ 19.757057] handle_softirqs+0x374/0xb28 [ 19.757265] __do_softirq+0x1c/0x28 [ 19.757300] [ 19.757349] Last potentially related work creation: [ 19.757384] kasan_save_stack+0x3c/0x68 [ 19.757425] kasan_record_aux_stack+0xb4/0xc8 [ 19.757482] __call_rcu_common.constprop.0+0x74/0x8c8 [ 19.757525] call_rcu+0x18/0x30 [ 19.757557] rcu_uaf+0x14c/0x2d8 [ 19.757866] kunit_try_run_case+0x170/0x3f0 [ 19.757925] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.757970] kthread+0x328/0x630 [ 19.758002] ret_from_fork+0x10/0x20 [ 19.758134] [ 19.758173] The buggy address belongs to the object at fff00000c63d9600 [ 19.758173] which belongs to the cache kmalloc-32 of size 32 [ 19.758391] The buggy address is located 0 bytes inside of [ 19.758391] freed 32-byte region [fff00000c63d9600, fff00000c63d9620) [ 19.758681] [ 19.758707] The buggy address belongs to the physical page: [ 19.758821] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1063d9 [ 19.758878] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.758931] page_type: f5(slab) [ 19.759083] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.759206] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.759248] page dumped because: kasan: bad access detected [ 19.759279] [ 19.759297] Memory state around the buggy address: [ 19.759545] fff00000c63d9500: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.759682] fff00000c63d9580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.759898] >fff00000c63d9600: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 19.759940] ^ [ 19.760006] fff00000c63d9680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.760079] fff00000c63d9700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.760342] ==================================================================
[ 13.098313] ================================================================== [ 13.098852] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 13.099161] Read of size 4 at addr ffff888102b87b00 by task swapper/0/0 [ 13.099458] [ 13.099701] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.099751] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.099762] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.099783] Call Trace: [ 13.099820] <IRQ> [ 13.099840] dump_stack_lvl+0x73/0xb0 [ 13.099896] print_report+0xd1/0x650 [ 13.099921] ? __virt_addr_valid+0x1db/0x2d0 [ 13.099946] ? rcu_uaf_reclaim+0x50/0x60 [ 13.100015] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.100040] ? rcu_uaf_reclaim+0x50/0x60 [ 13.100061] kasan_report+0x141/0x180 [ 13.100083] ? rcu_uaf_reclaim+0x50/0x60 [ 13.100109] __asan_report_load4_noabort+0x18/0x20 [ 13.100134] rcu_uaf_reclaim+0x50/0x60 [ 13.100166] rcu_core+0x66f/0x1c40 [ 13.100196] ? __pfx_rcu_core+0x10/0x10 [ 13.100217] ? ktime_get+0x6b/0x150 [ 13.100252] ? handle_softirqs+0x18e/0x730 [ 13.100277] rcu_core_si+0x12/0x20 [ 13.100297] handle_softirqs+0x209/0x730 [ 13.100327] ? hrtimer_interrupt+0x2fe/0x780 [ 13.100350] ? __pfx_handle_softirqs+0x10/0x10 [ 13.100376] __irq_exit_rcu+0xc9/0x110 [ 13.100406] irq_exit_rcu+0x12/0x20 [ 13.100425] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.100451] </IRQ> [ 13.100478] <TASK> [ 13.100488] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.100607] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 13.100819] 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 e3 81 21 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 [ 13.100896] RSP: 0000:ffffffff8fa07dd8 EFLAGS: 00010206 [ 13.100984] RAX: ffff8881ca272000 RBX: ffffffff8fa1cac0 RCX: ffffffff8e874105 [ 13.101030] RDX: ffffed102b60618b RSI: 0000000000000004 RDI: 0000000000006a04 [ 13.101073] RBP: ffffffff8fa07de0 R08: 0000000000000001 R09: ffffed102b60618a [ 13.101116] R10: ffff88815b030c53 R11: 0000000000061800 R12: 0000000000000000 [ 13.101158] R13: fffffbfff1f43958 R14: ffffffff905b1390 R15: 0000000000000000 [ 13.101215] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 13.101270] ? default_idle+0xd/0x20 [ 13.101291] arch_cpu_idle+0xd/0x20 [ 13.101313] default_idle_call+0x48/0x80 [ 13.101332] do_idle+0x379/0x4f0 [ 13.101358] ? __pfx_do_idle+0x10/0x10 [ 13.101385] cpu_startup_entry+0x5c/0x70 [ 13.101405] rest_init+0x11a/0x140 [ 13.101421] ? acpi_subsystem_init+0x5d/0x150 [ 13.101447] start_kernel+0x330/0x410 [ 13.101472] x86_64_start_reservations+0x1c/0x30 [ 13.101497] x86_64_start_kernel+0x10d/0x120 [ 13.101521] common_startup_64+0x13e/0x148 [ 13.101554] </TASK> [ 13.101565] [ 13.115727] Allocated by task 216: [ 13.115876] kasan_save_stack+0x45/0x70 [ 13.116092] kasan_save_track+0x18/0x40 [ 13.116266] kasan_save_alloc_info+0x3b/0x50 [ 13.116476] __kasan_kmalloc+0xb7/0xc0 [ 13.117057] __kmalloc_cache_noprof+0x189/0x420 [ 13.117458] rcu_uaf+0xb0/0x330 [ 13.117718] kunit_try_run_case+0x1a5/0x480 [ 13.118098] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.118513] kthread+0x337/0x6f0 [ 13.118674] ret_from_fork+0x116/0x1d0 [ 13.118999] ret_from_fork_asm+0x1a/0x30 [ 13.119288] [ 13.119424] Freed by task 0: [ 13.119617] kasan_save_stack+0x45/0x70 [ 13.120047] kasan_save_track+0x18/0x40 [ 13.120231] kasan_save_free_info+0x3f/0x60 [ 13.120547] __kasan_slab_free+0x56/0x70 [ 13.120740] kfree+0x222/0x3f0 [ 13.121193] rcu_uaf_reclaim+0x1f/0x60 [ 13.121349] rcu_core+0x66f/0x1c40 [ 13.121544] rcu_core_si+0x12/0x20 [ 13.121718] handle_softirqs+0x209/0x730 [ 13.121924] __irq_exit_rcu+0xc9/0x110 [ 13.122434] irq_exit_rcu+0x12/0x20 [ 13.122570] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.123010] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.123227] [ 13.123473] Last potentially related work creation: [ 13.123686] kasan_save_stack+0x45/0x70 [ 13.124025] kasan_record_aux_stack+0xb2/0xc0 [ 13.124231] __call_rcu_common.constprop.0+0x7b/0x9e0 [ 13.124449] call_rcu+0x12/0x20 [ 13.124763] rcu_uaf+0x168/0x330 [ 13.124937] kunit_try_run_case+0x1a5/0x480 [ 13.125332] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.125632] kthread+0x337/0x6f0 [ 13.125867] ret_from_fork+0x116/0x1d0 [ 13.126011] ret_from_fork_asm+0x1a/0x30 [ 13.126444] [ 13.126623] The buggy address belongs to the object at ffff888102b87b00 [ 13.126623] which belongs to the cache kmalloc-32 of size 32 [ 13.127525] The buggy address is located 0 bytes inside of [ 13.127525] freed 32-byte region [ffff888102b87b00, ffff888102b87b20) [ 13.128248] [ 13.128353] The buggy address belongs to the physical page: [ 13.128580] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b87 [ 13.129172] flags: 0x200000000000000(node=0|zone=2) [ 13.129403] page_type: f5(slab) [ 13.129772] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.130182] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.130536] page dumped because: kasan: bad access detected [ 13.130789] [ 13.130887] Memory state around the buggy address: [ 13.131272] ffff888102b87a00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.131679] ffff888102b87a80: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 13.132080] >ffff888102b87b00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 13.132368] ^ [ 13.132508] ffff888102b87b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.132810] ffff888102b87c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.133113] ==================================================================