Date
June 20, 2025, 12:38 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.657951] ================================================================== [ 32.658263] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 32.658726] Read of size 4 at addr fff00000c59d4a80 by task swapper/1/0 [ 32.658901] [ 32.659012] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G B N 6.16.0-rc2-next-20250620 #1 PREEMPT [ 32.659240] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.659325] Hardware name: linux,dummy-virt (DT) [ 32.659404] Call trace: [ 32.659476] show_stack+0x20/0x38 (C) [ 32.659817] dump_stack_lvl+0x8c/0xd0 [ 32.660061] print_report+0x118/0x608 [ 32.660179] kasan_report+0xdc/0x128 [ 32.660290] __asan_report_load4_noabort+0x20/0x30 [ 32.660409] rcu_uaf_reclaim+0x64/0x70 [ 32.660638] rcu_core+0x9f4/0x1e20 [ 32.660740] rcu_core_si+0x18/0x30 [ 32.660833] handle_softirqs+0x374/0xb28 [ 32.661117] __do_softirq+0x1c/0x28 [ 32.661258] ____do_softirq+0x18/0x30 [ 32.661395] call_on_irq_stack+0x24/0x30 [ 32.661580] do_softirq_own_stack+0x24/0x38 [ 32.661709] __irq_exit_rcu+0x1fc/0x318 [ 32.661828] irq_exit_rcu+0x1c/0x80 [ 32.661935] el1_interrupt+0x38/0x58 [ 32.662338] el1h_64_irq_handler+0x18/0x28 [ 32.662452] el1h_64_irq+0x6c/0x70 [ 32.662813] arch_local_irq_enable+0x4/0x8 (P) [ 32.663002] do_idle+0x384/0x4e8 [ 32.663107] cpu_startup_entry+0x64/0x80 [ 32.663268] secondary_start_kernel+0x288/0x340 [ 32.663440] __secondary_switched+0xc0/0xc8 [ 32.663593] [ 32.663656] Allocated by task 209: [ 32.663725] kasan_save_stack+0x3c/0x68 [ 32.663857] kasan_save_track+0x20/0x40 [ 32.664059] kasan_save_alloc_info+0x40/0x58 [ 32.664156] __kasan_kmalloc+0xd4/0xd8 [ 32.664688] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.665003] rcu_uaf+0xb0/0x2d8 [ 32.665075] kunit_try_run_case+0x170/0x3f0 [ 32.665150] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.665230] kthread+0x328/0x630 [ 32.665299] ret_from_fork+0x10/0x20 [ 32.665437] [ 32.665514] Freed by task 0: [ 32.665634] kasan_save_stack+0x3c/0x68 [ 32.665734] kasan_save_track+0x20/0x40 [ 32.665831] kasan_save_free_info+0x4c/0x78 [ 32.665928] __kasan_slab_free+0x6c/0x98 [ 32.666021] kfree+0x214/0x3c8 [ 32.666105] rcu_uaf_reclaim+0x28/0x70 [ 32.666196] rcu_core+0x9f4/0x1e20 [ 32.666288] rcu_core_si+0x18/0x30 [ 32.666371] handle_softirqs+0x374/0xb28 [ 32.666464] __do_softirq+0x1c/0x28 [ 32.666552] [ 32.666654] Last potentially related work creation: [ 32.666736] kasan_save_stack+0x3c/0x68 [ 32.666866] kasan_record_aux_stack+0xb4/0xc8 [ 32.666987] __call_rcu_common.constprop.0+0x74/0x8c8 [ 32.667692] call_rcu+0x18/0x30 [ 32.667893] rcu_uaf+0x14c/0x2d8 [ 32.667981] kunit_try_run_case+0x170/0x3f0 [ 32.668071] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.668184] kthread+0x328/0x630 [ 32.668281] ret_from_fork+0x10/0x20 [ 32.668389] [ 32.668726] The buggy address belongs to the object at fff00000c59d4a80 [ 32.668726] which belongs to the cache kmalloc-32 of size 32 [ 32.669013] The buggy address is located 0 bytes inside of [ 32.669013] freed 32-byte region [fff00000c59d4a80, fff00000c59d4aa0) [ 32.669165] [ 32.669213] The buggy address belongs to the physical page: [ 32.669277] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059d4 [ 32.669642] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.669993] page_type: f5(slab) [ 32.670107] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 32.670239] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 32.670342] page dumped because: kasan: bad access detected [ 32.670429] [ 32.670485] Memory state around the buggy address: [ 32.670604] fff00000c59d4980: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 32.670778] fff00000c59d4a00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 32.670931] >fff00000c59d4a80: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 32.671034] ^ [ 32.671108] fff00000c59d4b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.671219] fff00000c59d4b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.671325] ==================================================================
[ 26.271852] ================================================================== [ 26.272525] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 26.272718] Read of size 4 at addr ffff888102328d00 by task swapper/0/0 [ 26.273252] [ 26.273362] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc2-next-20250620 #1 PREEMPT(voluntary) [ 26.273424] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.273452] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.273481] Call Trace: [ 26.273513] <IRQ> [ 26.273537] dump_stack_lvl+0x73/0xb0 [ 26.273574] print_report+0xd1/0x650 [ 26.273599] ? __virt_addr_valid+0x1db/0x2d0 [ 26.273627] ? rcu_uaf_reclaim+0x50/0x60 [ 26.273648] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.273676] ? rcu_uaf_reclaim+0x50/0x60 [ 26.273698] kasan_report+0x141/0x180 [ 26.273721] ? rcu_uaf_reclaim+0x50/0x60 [ 26.273747] __asan_report_load4_noabort+0x18/0x20 [ 26.273773] rcu_uaf_reclaim+0x50/0x60 [ 26.273795] rcu_core+0x66f/0x1c40 [ 26.273828] ? __pfx_rcu_core+0x10/0x10 [ 26.273852] ? ktime_get+0x6b/0x150 [ 26.273881] rcu_core_si+0x12/0x20 [ 26.273903] handle_softirqs+0x209/0x730 [ 26.273926] ? hrtimer_interrupt+0x2fe/0x780 [ 26.273952] ? __pfx_handle_softirqs+0x10/0x10 [ 26.273979] __irq_exit_rcu+0xc9/0x110 [ 26.274000] irq_exit_rcu+0x12/0x20 [ 26.274022] sysvec_apic_timer_interrupt+0x81/0x90 [ 26.274062] </IRQ> [ 26.274092] <TASK> [ 26.274105] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 26.274323] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 26.274896] 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 63 d8 1e 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 [ 26.275066] RSP: 0000:ffffffffb4807dd8 EFLAGS: 00010216 [ 26.275208] RAX: ffff8881a545e000 RBX: ffffffffb481cac0 RCX: ffffffffb369e285 [ 26.275264] RDX: ffffed102b606193 RSI: 0000000000000004 RDI: 000000000006f9dc [ 26.275312] RBP: ffffffffb4807de0 R08: 0000000000000001 R09: ffffed102b606192 [ 26.275374] R10: ffff88815b030c93 R11: 0000000000035000 R12: 0000000000000000 [ 26.275423] R13: fffffbfff6903958 R14: ffffffffb53c1d90 R15: 0000000000000000 [ 26.275516] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 26.275592] ? default_idle+0xd/0x20 [ 26.275621] arch_cpu_idle+0xd/0x20 [ 26.275646] default_idle_call+0x48/0x80 [ 26.275671] do_idle+0x379/0x4f0 [ 26.275701] ? __pfx_do_idle+0x10/0x10 [ 26.275731] cpu_startup_entry+0x5c/0x70 [ 26.275757] rest_init+0x11a/0x140 [ 26.275776] ? acpi_subsystem_init+0x5d/0x150 [ 26.275805] start_kernel+0x330/0x410 [ 26.275832] x86_64_start_reservations+0x1c/0x30 [ 26.275858] x86_64_start_kernel+0x10d/0x120 [ 26.275884] common_startup_64+0x13e/0x148 [ 26.275919] </TASK> [ 26.275934] [ 26.287434] Allocated by task 227: [ 26.288615] kasan_save_stack+0x45/0x70 [ 26.288876] kasan_save_track+0x18/0x40 [ 26.289070] kasan_save_alloc_info+0x3b/0x50 [ 26.289811] __kasan_kmalloc+0xb7/0xc0 [ 26.289943] __kmalloc_cache_noprof+0x189/0x420 [ 26.290413] rcu_uaf+0xb0/0x330 [ 26.290575] kunit_try_run_case+0x1a5/0x480 [ 26.290698] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.290821] kthread+0x337/0x6f0 [ 26.290911] ret_from_fork+0x116/0x1d0 [ 26.291202] ret_from_fork_asm+0x1a/0x30 [ 26.291504] [ 26.291649] Freed by task 0: [ 26.291887] kasan_save_stack+0x45/0x70 [ 26.292205] kasan_save_track+0x18/0x40 [ 26.293036] kasan_save_free_info+0x3f/0x60 [ 26.293209] __kasan_slab_free+0x56/0x70 [ 26.293537] kfree+0x222/0x3f0 [ 26.294086] rcu_uaf_reclaim+0x1f/0x60 [ 26.294477] rcu_core+0x66f/0x1c40 [ 26.294706] rcu_core_si+0x12/0x20 [ 26.294904] handle_softirqs+0x209/0x730 [ 26.295258] __irq_exit_rcu+0xc9/0x110 [ 26.295804] irq_exit_rcu+0x12/0x20 [ 26.296039] sysvec_apic_timer_interrupt+0x81/0x90 [ 26.296205] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 26.296326] [ 26.296427] Last potentially related work creation: [ 26.297169] kasan_save_stack+0x45/0x70 [ 26.297437] kasan_record_aux_stack+0xb2/0xc0 [ 26.297563] __call_rcu_common.constprop.0+0x7b/0x9e0 [ 26.297680] call_rcu+0x12/0x20 [ 26.298006] rcu_uaf+0x168/0x330 [ 26.298157] kunit_try_run_case+0x1a5/0x480 [ 26.298311] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.298540] kthread+0x337/0x6f0 [ 26.298724] ret_from_fork+0x116/0x1d0 [ 26.298982] ret_from_fork_asm+0x1a/0x30 [ 26.299166] [ 26.299283] The buggy address belongs to the object at ffff888102328d00 [ 26.299283] which belongs to the cache kmalloc-32 of size 32 [ 26.299607] The buggy address is located 0 bytes inside of [ 26.299607] freed 32-byte region [ffff888102328d00, ffff888102328d20) [ 26.300490] [ 26.300560] The buggy address belongs to the physical page: [ 26.300677] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102328 [ 26.300835] flags: 0x200000000000000(node=0|zone=2) [ 26.300949] page_type: f5(slab) [ 26.301695] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 26.302098] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 26.302475] page dumped because: kasan: bad access detected [ 26.302840] [ 26.302916] Memory state around the buggy address: [ 26.303179] ffff888102328c00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 26.303476] ffff888102328c80: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 26.303991] >ffff888102328d00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 26.304160] ^ [ 26.304414] ffff888102328d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.305129] ffff888102328e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.305691] ==================================================================