Date
July 18, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.694471] ================================================================== [ 15.694585] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 15.696634] Read of size 4 at addr fff00000c7713d00 by task swapper/1/0 [ 15.697139] [ 15.697266] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.697922] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.697955] Hardware name: linux,dummy-virt (DT) [ 15.698728] Call trace: [ 15.698985] show_stack+0x20/0x38 (C) [ 15.699547] dump_stack_lvl+0x8c/0xd0 [ 15.699886] print_report+0x118/0x5d0 [ 15.700524] kasan_report+0xdc/0x128 [ 15.701290] __asan_report_load4_noabort+0x20/0x30 [ 15.701490] rcu_uaf_reclaim+0x64/0x70 [ 15.701830] rcu_core+0x9f4/0x1e20 [ 15.702250] rcu_core_si+0x18/0x30 [ 15.702523] handle_softirqs+0x374/0xb28 [ 15.702814] __do_softirq+0x1c/0x28 [ 15.702862] ____do_softirq+0x18/0x30 [ 15.703702] call_on_irq_stack+0x24/0x30 [ 15.703975] do_softirq_own_stack+0x24/0x38 [ 15.704025] __irq_exit_rcu+0x1fc/0x318 [ 15.704074] irq_exit_rcu+0x1c/0x80 [ 15.704866] el1_interrupt+0x38/0x58 [ 15.705572] el1h_64_irq_handler+0x18/0x28 [ 15.705636] el1h_64_irq+0x6c/0x70 [ 15.707362] arch_local_irq_enable+0x4/0x8 (P) [ 15.707590] do_idle+0x384/0x4e8 [ 15.708062] cpu_startup_entry+0x64/0x80 [ 15.708121] secondary_start_kernel+0x288/0x340 [ 15.708956] __secondary_switched+0xc0/0xc8 [ 15.709909] [ 15.710020] Allocated by task 198: [ 15.710053] kasan_save_stack+0x3c/0x68 [ 15.710913] kasan_save_track+0x20/0x40 [ 15.711400] kasan_save_alloc_info+0x40/0x58 [ 15.711592] __kasan_kmalloc+0xd4/0xd8 [ 15.711657] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.711705] rcu_uaf+0xb0/0x2d8 [ 15.711793] kunit_try_run_case+0x170/0x3f0 [ 15.711837] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.712344] kthread+0x328/0x630 [ 15.712391] ret_from_fork+0x10/0x20 [ 15.712427] [ 15.712448] Freed by task 0: [ 15.713044] kasan_save_stack+0x3c/0x68 [ 15.713485] kasan_save_track+0x20/0x40 [ 15.713523] kasan_save_free_info+0x4c/0x78 [ 15.713564] __kasan_slab_free+0x6c/0x98 [ 15.714401] kfree+0x214/0x3c8 [ 15.714950] rcu_uaf_reclaim+0x28/0x70 [ 15.715313] rcu_core+0x9f4/0x1e20 [ 15.715900] rcu_core_si+0x18/0x30 [ 15.716377] handle_softirqs+0x374/0xb28 [ 15.716481] __do_softirq+0x1c/0x28 [ 15.716646] [ 15.716768] Last potentially related work creation: [ 15.717548] kasan_save_stack+0x3c/0x68 [ 15.717898] kasan_record_aux_stack+0xb4/0xc8 [ 15.717944] __call_rcu_common.constprop.0+0x74/0x8c8 [ 15.718477] call_rcu+0x18/0x30 [ 15.719074] rcu_uaf+0x14c/0x2d8 [ 15.719213] kunit_try_run_case+0x170/0x3f0 [ 15.719539] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.719589] kthread+0x328/0x630 [ 15.720257] ret_from_fork+0x10/0x20 [ 15.720699] [ 15.720737] The buggy address belongs to the object at fff00000c7713d00 [ 15.720737] which belongs to the cache kmalloc-32 of size 32 [ 15.721584] The buggy address is located 0 bytes inside of [ 15.721584] freed 32-byte region [fff00000c7713d00, fff00000c7713d20) [ 15.722747] [ 15.722800] The buggy address belongs to the physical page: [ 15.722941] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107713 [ 15.723801] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.724162] page_type: f5(slab) [ 15.724485] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 15.724582] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 15.724774] page dumped because: kasan: bad access detected [ 15.725553] [ 15.725710] Memory state around the buggy address: [ 15.725965] fff00000c7713c00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 15.726187] fff00000c7713c80: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 15.726246] >fff00000c7713d00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 15.726891] ^ [ 15.726934] fff00000c7713d80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.727274] fff00000c7713e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.728079] ==================================================================
[ 12.758263] ================================================================== [ 12.758752] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 12.759041] Read of size 4 at addr ffff8881029d7680 by task swapper/0/0 [ 12.759430] [ 12.759537] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.759604] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.759617] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.759636] Call Trace: [ 12.759662] <IRQ> [ 12.759676] dump_stack_lvl+0x73/0xb0 [ 12.759708] print_report+0xd1/0x610 [ 12.759730] ? __virt_addr_valid+0x1db/0x2d0 [ 12.759753] ? rcu_uaf_reclaim+0x50/0x60 [ 12.759772] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.759815] ? rcu_uaf_reclaim+0x50/0x60 [ 12.759835] kasan_report+0x141/0x180 [ 12.759856] ? rcu_uaf_reclaim+0x50/0x60 [ 12.759893] __asan_report_load4_noabort+0x18/0x20 [ 12.759917] rcu_uaf_reclaim+0x50/0x60 [ 12.759937] rcu_core+0x66f/0x1c40 [ 12.759964] ? __pfx_rcu_core+0x10/0x10 [ 12.759985] ? ktime_get+0x6b/0x150 [ 12.760009] rcu_core_si+0x12/0x20 [ 12.760028] handle_softirqs+0x209/0x730 [ 12.760050] ? hrtimer_interrupt+0x2fe/0x780 [ 12.760071] ? __pfx_handle_softirqs+0x10/0x10 [ 12.760096] __irq_exit_rcu+0xc9/0x110 [ 12.760134] irq_exit_rcu+0x12/0x20 [ 12.760153] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.760179] </IRQ> [ 12.760205] <TASK> [ 12.760215] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.760316] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 12.760562] 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 23 62 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 [ 12.760644] RSP: 0000:ffffffff86e07dd8 EFLAGS: 00010212 [ 12.760731] RAX: ffff8881d2e72000 RBX: ffffffff86e1cac0 RCX: ffffffff85c76125 [ 12.760775] RDX: ffffed102b60618b RSI: 0000000000000004 RDI: 000000000000592c [ 12.760819] RBP: ffffffff86e07de0 R08: 0000000000000001 R09: ffffed102b60618a [ 12.760860] R10: ffff88815b030c53 R11: 000000000002ac00 R12: 0000000000000000 [ 12.760902] R13: fffffbfff0dc3958 R14: ffffffff879b1490 R15: 0000000000000000 [ 12.760968] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 12.761022] ? default_idle+0xd/0x20 [ 12.761044] arch_cpu_idle+0xd/0x20 [ 12.761065] default_idle_call+0x48/0x80 [ 12.761084] do_idle+0x379/0x4f0 [ 12.761109] ? __pfx_do_idle+0x10/0x10 [ 12.761130] ? trace_preempt_on+0x20/0xc0 [ 12.761151] ? schedule+0x86/0x2e0 [ 12.761171] ? preempt_count_sub+0x50/0x80 [ 12.761193] cpu_startup_entry+0x5c/0x70 [ 12.761212] rest_init+0x11a/0x140 [ 12.761229] ? acpi_subsystem_init+0x5d/0x150 [ 12.761254] start_kernel+0x330/0x410 [ 12.761292] x86_64_start_reservations+0x1c/0x30 [ 12.761317] x86_64_start_kernel+0x10d/0x120 [ 12.761341] common_startup_64+0x13e/0x148 [ 12.761372] </TASK> [ 12.761382] [ 12.771669] Allocated by task 217: [ 12.771817] kasan_save_stack+0x45/0x70 [ 12.771967] kasan_save_track+0x18/0x40 [ 12.772103] kasan_save_alloc_info+0x3b/0x50 [ 12.772251] __kasan_kmalloc+0xb7/0xc0 [ 12.772394] __kmalloc_cache_noprof+0x189/0x420 [ 12.772615] rcu_uaf+0xb0/0x330 [ 12.772783] kunit_try_run_case+0x1a5/0x480 [ 12.772997] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.773377] kthread+0x337/0x6f0 [ 12.773599] ret_from_fork+0x116/0x1d0 [ 12.773733] ret_from_fork_asm+0x1a/0x30 [ 12.773871] [ 12.773940] Freed by task 0: [ 12.774046] kasan_save_stack+0x45/0x70 [ 12.774236] kasan_save_track+0x18/0x40 [ 12.774436] kasan_save_free_info+0x3f/0x60 [ 12.774657] __kasan_slab_free+0x56/0x70 [ 12.774850] kfree+0x222/0x3f0 [ 12.775033] rcu_uaf_reclaim+0x1f/0x60 [ 12.775217] rcu_core+0x66f/0x1c40 [ 12.775400] rcu_core_si+0x12/0x20 [ 12.775607] handle_softirqs+0x209/0x730 [ 12.775742] __irq_exit_rcu+0xc9/0x110 [ 12.775871] irq_exit_rcu+0x12/0x20 [ 12.775995] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.776153] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.776413] [ 12.776519] Last potentially related work creation: [ 12.776749] kasan_save_stack+0x45/0x70 [ 12.776950] kasan_record_aux_stack+0xb2/0xc0 [ 12.777392] __call_rcu_common.constprop.0+0x7b/0x9e0 [ 12.777702] call_rcu+0x12/0x20 [ 12.777820] rcu_uaf+0x168/0x330 [ 12.777940] kunit_try_run_case+0x1a5/0x480 [ 12.778084] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.778585] kthread+0x337/0x6f0 [ 12.778755] ret_from_fork+0x116/0x1d0 [ 12.778941] ret_from_fork_asm+0x1a/0x30 [ 12.779147] [ 12.779250] The buggy address belongs to the object at ffff8881029d7680 [ 12.779250] which belongs to the cache kmalloc-32 of size 32 [ 12.779701] The buggy address is located 0 bytes inside of [ 12.779701] freed 32-byte region [ffff8881029d7680, ffff8881029d76a0) [ 12.780047] [ 12.780119] The buggy address belongs to the physical page: [ 12.780408] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029d7 [ 12.781166] flags: 0x200000000000000(node=0|zone=2) [ 12.781342] page_type: f5(slab) [ 12.781543] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 12.781854] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 12.782144] page dumped because: kasan: bad access detected [ 12.782331] [ 12.782423] Memory state around the buggy address: [ 12.782666] ffff8881029d7580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 12.783062] ffff8881029d7600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 12.783373] >ffff8881029d7680: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 12.783741] ^ [ 12.783859] ffff8881029d7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.784077] ffff8881029d7780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.784298] ==================================================================