Date
June 24, 2025, 11:37 a.m.
| Environment | |
|---|---|
| dragonboard-845c | |
| qemu-arm64 | |
| qemu-x86_64 |
[ 42.627232] ================================================================== [ 42.637742] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 42.644542] Read of size 4 at addr ffff0000829a85c0 by task swapper/3/0 [ 42.651244] [ 42.652777] CPU: 3 UID: 0 PID: 0 Comm: swapper/3 Tainted: G B N 6.16.0-rc3-next-20250624 #1 PREEMPT [ 42.652807] Tainted: [B]=BAD_PAGE, [N]=TEST [ 42.652817] Hardware name: Thundercomm Dragonboard 845c (DT) [ 42.652830] Call trace: [ 42.652837] show_stack+0x20/0x38 (C) [ 42.652855] dump_stack_lvl+0x8c/0xd0 [ 42.652875] print_report+0x118/0x608 [ 42.652895] kasan_report+0xdc/0x128 [ 42.652913] __asan_report_load4_noabort+0x20/0x30 [ 42.652932] rcu_uaf_reclaim+0x64/0x70 [ 42.652949] rcu_core+0x9f4/0x1e20 [ 42.652971] rcu_core_si+0x18/0x30 [ 42.652989] handle_softirqs+0x374/0xb28 [ 42.653011] __do_softirq+0x1c/0x28 [ 42.653027] ____do_softirq+0x18/0x30 [ 42.653044] call_on_irq_stack+0x24/0x30 [ 42.653063] do_softirq_own_stack+0x24/0x38 [ 42.653082] __irq_exit_rcu+0x1fc/0x318 [ 42.653099] irq_exit_rcu+0x1c/0x80 [ 42.653116] el1_interrupt+0x38/0x58 [ 42.653138] el1h_64_irq_handler+0x18/0x28 [ 42.653160] el1h_64_irq+0x6c/0x70 [ 42.653176] arch_local_irq_enable+0x4/0x8 (P) [ 42.653199] cpuidle_enter+0x60/0xb8 [ 42.653217] do_idle+0x36c/0x4e8 [ 42.653238] cpu_startup_entry+0x64/0x80 [ 42.653260] secondary_start_kernel+0x288/0x340 [ 42.653281] __secondary_switched+0xc0/0xc8 [ 42.653306] [ 42.770292] Allocated by task 296: [ 42.773751] kasan_save_stack+0x3c/0x68 [ 42.777662] kasan_save_track+0x20/0x40 [ 42.781563] kasan_save_alloc_info+0x40/0x58 [ 42.785901] __kasan_kmalloc+0xd4/0xd8 [ 42.789725] __kmalloc_cache_noprof+0x16c/0x3c0 [ 42.794337] rcu_uaf+0xb0/0x2d8 [ 42.797542] kunit_try_run_case+0x170/0x3f0 [ 42.801798] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 42.807370] kthread+0x328/0x630 [ 42.810665] ret_from_fork+0x10/0x20 [ 42.814305] [ 42.815838] Freed by task 0: [ 42.818775] kasan_save_stack+0x3c/0x68 [ 42.822687] kasan_save_track+0x20/0x40 [ 42.826597] kasan_save_free_info+0x4c/0x78 [ 42.830850] __kasan_slab_free+0x6c/0x98 [ 42.834846] kfree+0x214/0x3c8 [ 42.837965] rcu_uaf_reclaim+0x28/0x70 [ 42.841784] rcu_core+0x9f4/0x1e20 [ 42.845252] rcu_core_si+0x18/0x30 [ 42.848718] handle_softirqs+0x374/0xb28 [ 42.852715] __do_softirq+0x1c/0x28 [ 42.856265] [ 42.857795] Last potentially related work creation: [ 42.862743] kasan_save_stack+0x3c/0x68 [ 42.866652] kasan_record_aux_stack+0xb4/0xc8 [ 42.871077] __call_rcu_common.constprop.0+0x74/0x8c8 [ 42.876212] call_rcu+0x18/0x30 [ 42.879421] rcu_uaf+0x14c/0x2d8 [ 42.882716] kunit_try_run_case+0x170/0x3f0 [ 42.886970] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 42.892540] kthread+0x328/0x630 [ 42.895832] ret_from_fork+0x10/0x20 [ 42.899475] [ 42.901002] The buggy address belongs to the object at ffff0000829a85c0 [ 42.901002] which belongs to the cache kmalloc-32 of size 32 [ 42.913483] The buggy address is located 0 bytes inside of [ 42.913483] freed 32-byte region [ffff0000829a85c0, ffff0000829a85e0) [ 42.925624] [ 42.927152] The buggy address belongs to the physical page: [ 42.932800] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029a8 [ 42.940905] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 42.947520] page_type: f5(slab) [ 42.950728] raw: 0bfffe0000000000 ffff000080002780 dead000000000122 0000000000000000 [ 42.958575] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 42.966417] page dumped because: kasan: bad access detected [ 42.972061] [ 42.973592] Memory state around the buggy address: [ 42.978454] ffff0000829a8480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 42.985768] ffff0000829a8500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 42.993082] >ffff0000829a8580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 43.000397] ^ [ 43.005790] ffff0000829a8600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.013105] ffff0000829a8680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.020418] ==================================================================
[ 33.544753] ================================================================== [ 33.545038] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 33.545357] Read of size 4 at addr fff00000c7738400 by task swapper/0/0 [ 33.545497] [ 33.545580] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc3-next-20250624 #1 PREEMPT [ 33.545780] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.545840] Hardware name: linux,dummy-virt (DT) [ 33.546001] Call trace: [ 33.546284] show_stack+0x20/0x38 (C) [ 33.546444] dump_stack_lvl+0x8c/0xd0 [ 33.546538] print_report+0x118/0x608 [ 33.546600] kasan_report+0xdc/0x128 [ 33.546694] __asan_report_load4_noabort+0x20/0x30 [ 33.546775] rcu_uaf_reclaim+0x64/0x70 [ 33.546830] rcu_core+0x9f4/0x1e20 [ 33.546908] rcu_core_si+0x18/0x30 [ 33.547183] handle_softirqs+0x374/0xb28 [ 33.547342] __do_softirq+0x1c/0x28 [ 33.547499] ____do_softirq+0x18/0x30 [ 33.547653] call_on_irq_stack+0x24/0x30 [ 33.547835] do_softirq_own_stack+0x24/0x38 [ 33.548185] __irq_exit_rcu+0x1fc/0x318 [ 33.548306] irq_exit_rcu+0x1c/0x80 [ 33.548453] el1_interrupt+0x38/0x58 [ 33.548818] el1h_64_irq_handler+0x18/0x28 [ 33.548955] el1h_64_irq+0x6c/0x70 [ 33.549138] arch_local_irq_enable+0x4/0x8 (P) [ 33.549272] do_idle+0x384/0x4e8 [ 33.549381] cpu_startup_entry+0x68/0x80 [ 33.549498] rest_init+0x160/0x188 [ 33.549623] start_kernel+0x30c/0x3d0 [ 33.549752] __primary_switched+0x8c/0xa0 [ 33.549880] [ 33.549948] Allocated by task 209: [ 33.550019] kasan_save_stack+0x3c/0x68 [ 33.550125] kasan_save_track+0x20/0x40 [ 33.550222] kasan_save_alloc_info+0x40/0x58 [ 33.550327] __kasan_kmalloc+0xd4/0xd8 [ 33.550433] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.550562] rcu_uaf+0xb0/0x2d8 [ 33.550662] kunit_try_run_case+0x170/0x3f0 [ 33.550837] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.550981] kthread+0x328/0x630 [ 33.551191] ret_from_fork+0x10/0x20 [ 33.551300] [ 33.551353] Freed by task 0: [ 33.551449] kasan_save_stack+0x3c/0x68 [ 33.551583] kasan_save_track+0x20/0x40 [ 33.551697] kasan_save_free_info+0x4c/0x78 [ 33.551839] __kasan_slab_free+0x6c/0x98 [ 33.552037] kfree+0x214/0x3c8 [ 33.552129] rcu_uaf_reclaim+0x28/0x70 [ 33.552238] rcu_core+0x9f4/0x1e20 [ 33.552377] rcu_core_si+0x18/0x30 [ 33.552473] handle_softirqs+0x374/0xb28 [ 33.552581] __do_softirq+0x1c/0x28 [ 33.552705] [ 33.552810] Last potentially related work creation: [ 33.552917] kasan_save_stack+0x3c/0x68 [ 33.553077] kasan_record_aux_stack+0xb4/0xc8 [ 33.553203] __call_rcu_common.constprop.0+0x74/0x8c8 [ 33.553632] call_rcu+0x18/0x30 [ 33.553834] rcu_uaf+0x14c/0x2d8 [ 33.554010] kunit_try_run_case+0x170/0x3f0 [ 33.554201] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.554510] kthread+0x328/0x630 [ 33.554610] ret_from_fork+0x10/0x20 [ 33.554723] [ 33.555047] The buggy address belongs to the object at fff00000c7738400 [ 33.555047] which belongs to the cache kmalloc-32 of size 32 [ 33.555182] The buggy address is located 0 bytes inside of [ 33.555182] freed 32-byte region [fff00000c7738400, fff00000c7738420) [ 33.555261] [ 33.555343] The buggy address belongs to the physical page: [ 33.555448] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107738 [ 33.555529] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.555591] page_type: f5(slab) [ 33.555639] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 33.555699] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 33.555749] page dumped because: kasan: bad access detected [ 33.555787] [ 33.555808] Memory state around the buggy address: [ 33.555848] fff00000c7738300: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 33.556875] fff00000c7738380: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 33.557672] >fff00000c7738400: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 33.558030] ^ [ 33.558386] fff00000c7738480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.558496] fff00000c7738500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.559037] ==================================================================
[ 29.837313] ================================================================== [ 29.837966] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 29.838846] Read of size 4 at addr ffff888102de1380 by task swapper/0/0 [ 29.839618] [ 29.840488] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc3-next-20250624 #1 PREEMPT(voluntary) [ 29.840672] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.840722] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 29.840763] Call Trace: [ 29.840804] <IRQ> [ 29.840829] dump_stack_lvl+0x73/0xb0 [ 29.840878] print_report+0xd1/0x650 [ 29.840911] ? __virt_addr_valid+0x1db/0x2d0 [ 29.840946] ? rcu_uaf_reclaim+0x50/0x60 [ 29.840973] ? kasan_complete_mode_report_info+0x64/0x200 [ 29.841006] ? rcu_uaf_reclaim+0x50/0x60 [ 29.841033] kasan_report+0x141/0x180 [ 29.841086] ? rcu_uaf_reclaim+0x50/0x60 [ 29.841142] __asan_report_load4_noabort+0x18/0x20 [ 29.841195] rcu_uaf_reclaim+0x50/0x60 [ 29.841225] rcu_core+0x66f/0x1c40 [ 29.841263] ? __pfx_rcu_core+0x10/0x10 [ 29.841292] ? ktime_get+0x6b/0x150 [ 29.841326] rcu_core_si+0x12/0x20 [ 29.841352] handle_softirqs+0x209/0x730 [ 29.841380] ? hrtimer_interrupt+0x2fe/0x780 [ 29.841415] ? __pfx_handle_softirqs+0x10/0x10 [ 29.841447] __irq_exit_rcu+0xc9/0x110 [ 29.841473] irq_exit_rcu+0x12/0x20 [ 29.841499] sysvec_apic_timer_interrupt+0x81/0x90 [ 29.841533] </IRQ> [ 29.841594] <TASK> [ 29.841610] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 29.841750] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 29.842023] 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 83 d9 1a 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 [ 29.842220] RSP: 0000:ffffffffa0607dd8 EFLAGS: 00010206 [ 29.842342] RAX: ffff8881b962f000 RBX: ffffffffa061cac0 RCX: ffffffff9f4de165 [ 29.842401] RDX: ffffed102b606193 RSI: 0000000000000004 RDI: 0000000000039794 [ 29.842457] RBP: ffffffffa0607de0 R08: 0000000000000001 R09: ffffed102b606192 [ 29.842511] R10: ffff88815b030c93 R11: 0000000000063800 R12: 0000000000000000 [ 29.842587] R13: fffffbfff40c3958 R14: ffffffffa11e9490 R15: 0000000000000000 [ 29.842678] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 29.842759] ? default_idle+0xd/0x20 [ 29.842790] arch_cpu_idle+0xd/0x20 [ 29.842817] default_idle_call+0x48/0x80 [ 29.842845] do_idle+0x379/0x4f0 [ 29.842880] ? __pfx_do_idle+0x10/0x10 [ 29.842915] cpu_startup_entry+0x5c/0x70 [ 29.842946] rest_init+0x11a/0x140 [ 29.842971] ? acpi_subsystem_init+0x5d/0x150 [ 29.843006] start_kernel+0x352/0x400 [ 29.843035] x86_64_start_reservations+0x1c/0x30 [ 29.843082] x86_64_start_kernel+0x10d/0x120 [ 29.843135] common_startup_64+0x13e/0x148 [ 29.843194] </TASK> [ 29.843211] [ 29.866530] Allocated by task 228: [ 29.867359] kasan_save_stack+0x45/0x70 [ 29.867618] kasan_save_track+0x18/0x40 [ 29.868089] kasan_save_alloc_info+0x3b/0x50 [ 29.868575] __kasan_kmalloc+0xb7/0xc0 [ 29.869070] __kmalloc_cache_noprof+0x189/0x420 [ 29.869832] rcu_uaf+0xb0/0x330 [ 29.870262] kunit_try_run_case+0x1a5/0x480 [ 29.870643] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.871925] kthread+0x337/0x6f0 [ 29.872267] ret_from_fork+0x116/0x1d0 [ 29.872715] ret_from_fork_asm+0x1a/0x30 [ 29.873097] [ 29.873284] Freed by task 0: [ 29.874087] kasan_save_stack+0x45/0x70 [ 29.874296] kasan_save_track+0x18/0x40 [ 29.874748] kasan_save_free_info+0x3f/0x60 [ 29.875193] __kasan_slab_free+0x56/0x70 [ 29.875964] kfree+0x222/0x3f0 [ 29.876618] rcu_uaf_reclaim+0x1f/0x60 [ 29.876910] rcu_core+0x66f/0x1c40 [ 29.877282] rcu_core_si+0x12/0x20 [ 29.877835] handle_softirqs+0x209/0x730 [ 29.878186] __irq_exit_rcu+0xc9/0x110 [ 29.879111] irq_exit_rcu+0x12/0x20 [ 29.879597] sysvec_apic_timer_interrupt+0x81/0x90 [ 29.880006] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 29.880382] [ 29.881030] Last potentially related work creation: [ 29.881669] kasan_save_stack+0x45/0x70 [ 29.881965] kasan_record_aux_stack+0xb2/0xc0 [ 29.882913] __call_rcu_common.constprop.0+0x7b/0x9e0 [ 29.883733] call_rcu+0x12/0x20 [ 29.884209] rcu_uaf+0x168/0x330 [ 29.884812] kunit_try_run_case+0x1a5/0x480 [ 29.885523] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.886337] kthread+0x337/0x6f0 [ 29.886778] ret_from_fork+0x116/0x1d0 [ 29.887301] ret_from_fork_asm+0x1a/0x30 [ 29.887859] [ 29.888101] The buggy address belongs to the object at ffff888102de1380 [ 29.888101] which belongs to the cache kmalloc-32 of size 32 [ 29.888866] The buggy address is located 0 bytes inside of [ 29.888866] freed 32-byte region [ffff888102de1380, ffff888102de13a0) [ 29.890083] [ 29.890284] The buggy address belongs to the physical page: [ 29.891262] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102de1 [ 29.891484] flags: 0x200000000000000(node=0|zone=2) [ 29.891727] page_type: f5(slab) [ 29.892057] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 29.892624] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 29.893390] page dumped because: kasan: bad access detected [ 29.894592] [ 29.894769] Memory state around the buggy address: [ 29.895228] ffff888102de1280: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 29.895865] ffff888102de1300: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 29.896601] >ffff888102de1380: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 29.897053] ^ [ 29.897799] ffff888102de1400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.898674] ffff888102de1480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.899148] ==================================================================