Date
June 16, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.942490] ================================================================== [ 19.942753] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 19.942920] Read of size 4 at addr fff00000c6406880 by task swapper/0/0 [ 19.943034] [ 19.943128] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT [ 19.944818] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.945259] Hardware name: linux,dummy-virt (DT) [ 19.945344] Call trace: [ 19.945394] show_stack+0x20/0x38 (C) [ 19.945514] dump_stack_lvl+0x8c/0xd0 [ 19.945614] print_report+0x118/0x608 [ 19.946937] kasan_report+0xdc/0x128 [ 19.947568] __asan_report_load4_noabort+0x20/0x30 [ 19.947993] rcu_uaf_reclaim+0x64/0x70 [ 19.948226] rcu_core+0x9f4/0x1e20 [ 19.948372] rcu_core_si+0x18/0x30 [ 19.948849] handle_softirqs+0x374/0xb28 [ 19.949330] __do_softirq+0x1c/0x28 [ 19.949549] ____do_softirq+0x18/0x30 [ 19.949658] call_on_irq_stack+0x24/0x30 [ 19.949805] do_softirq_own_stack+0x24/0x38 [ 19.950242] __irq_exit_rcu+0x1fc/0x318 [ 19.950761] irq_exit_rcu+0x1c/0x80 [ 19.951065] el1_interrupt+0x38/0x58 [ 19.951603] el1h_64_irq_handler+0x18/0x28 [ 19.951722] el1h_64_irq+0x6c/0x70 [ 19.952748] finish_task_switch.isra.0+0x120/0x5e8 (P) [ 19.953554] __schedule+0xab4/0x2840 [ 19.953691] schedule_idle+0x60/0xa8 [ 19.953922] do_idle+0x2c4/0x4e8 [ 19.954168] cpu_startup_entry+0x64/0x80 [ 19.954713] rest_init+0x160/0x188 [ 19.955146] start_kernel+0x30c/0x3d0 [ 19.955297] __primary_switched+0x8c/0xa0 [ 19.955431] [ 19.955856] Allocated by task 207: [ 19.956227] kasan_save_stack+0x3c/0x68 [ 19.956471] kasan_save_track+0x20/0x40 [ 19.956684] kasan_save_alloc_info+0x40/0x58 [ 19.957041] __kasan_kmalloc+0xd4/0xd8 [ 19.957263] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.957359] rcu_uaf+0xb0/0x2d8 [ 19.957442] kunit_try_run_case+0x170/0x3f0 [ 19.957538] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.957720] kthread+0x328/0x630 [ 19.957856] ret_from_fork+0x10/0x20 [ 19.957989] [ 19.958060] Freed by task 0: [ 19.958140] kasan_save_stack+0x3c/0x68 [ 19.958233] kasan_save_track+0x20/0x40 [ 19.958332] kasan_save_free_info+0x4c/0x78 [ 19.958466] __kasan_slab_free+0x6c/0x98 [ 19.958555] kfree+0x214/0x3c8 [ 19.958688] rcu_uaf_reclaim+0x28/0x70 [ 19.958792] rcu_core+0x9f4/0x1e20 [ 19.958924] rcu_core_si+0x18/0x30 [ 19.959004] handle_softirqs+0x374/0xb28 [ 19.959085] __do_softirq+0x1c/0x28 [ 19.959170] [ 19.959244] Last potentially related work creation: [ 19.959318] kasan_save_stack+0x3c/0x68 [ 19.959411] kasan_record_aux_stack+0xb4/0xc8 [ 19.959496] __call_rcu_common.constprop.0+0x74/0x8c8 [ 19.959593] call_rcu+0x18/0x30 [ 19.959671] rcu_uaf+0x14c/0x2d8 [ 19.959750] kunit_try_run_case+0x170/0x3f0 [ 19.959843] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.959936] kthread+0x328/0x630 [ 19.960006] ret_from_fork+0x10/0x20 [ 19.960376] [ 19.960455] The buggy address belongs to the object at fff00000c6406880 [ 19.960455] which belongs to the cache kmalloc-32 of size 32 [ 19.960674] The buggy address is located 0 bytes inside of [ 19.960674] freed 32-byte region [fff00000c6406880, fff00000c64068a0) [ 19.960890] [ 19.960942] The buggy address belongs to the physical page: [ 19.961024] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106406 [ 19.961395] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.961632] page_type: f5(slab) [ 19.961727] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.961869] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.962017] page dumped because: kasan: bad access detected [ 19.962093] [ 19.962142] Memory state around the buggy address: [ 19.962222] fff00000c6406780: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.962591] fff00000c6406800: 00 00 05 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.962722] >fff00000c6406880: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.962820] ^ [ 19.962901] fff00000c6406900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.963181] fff00000c6406980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.963395] ==================================================================
[ 12.045548] ================================================================== [ 12.046721] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 12.047550] Read of size 4 at addr ffff888102a265c0 by task swapper/0/0 [ 12.048204] [ 12.048387] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT(voluntary) [ 12.048436] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.048448] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.048467] Call Trace: [ 12.048498] <IRQ> [ 12.048516] dump_stack_lvl+0x73/0xb0 [ 12.048549] print_report+0xd1/0x650 [ 12.048573] ? __virt_addr_valid+0x1db/0x2d0 [ 12.048597] ? rcu_uaf_reclaim+0x50/0x60 [ 12.048617] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.048638] ? rcu_uaf_reclaim+0x50/0x60 [ 12.048658] kasan_report+0x141/0x180 [ 12.048679] ? rcu_uaf_reclaim+0x50/0x60 [ 12.048702] __asan_report_load4_noabort+0x18/0x20 [ 12.048725] rcu_uaf_reclaim+0x50/0x60 [ 12.048744] rcu_core+0x66f/0x1c40 [ 12.048772] ? __pfx_rcu_core+0x10/0x10 [ 12.048793] ? ktime_get+0x6b/0x150 [ 12.048815] ? handle_softirqs+0x18e/0x730 [ 12.048839] rcu_core_si+0x12/0x20 [ 12.048859] handle_softirqs+0x209/0x730 [ 12.048877] ? hrtimer_interrupt+0x2fe/0x780 [ 12.048899] ? __pfx_handle_softirqs+0x10/0x10 [ 12.048923] __irq_exit_rcu+0xc9/0x110 [ 12.048955] irq_exit_rcu+0x12/0x20 [ 12.048973] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.048997] </IRQ> [ 12.049022] <TASK> [ 12.049032] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.049120] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 12.049325] 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 e8 1e 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 [ 12.049472] RSP: 0000:ffffffffb6a07dd8 EFLAGS: 00010202 [ 12.049568] RAX: ffff88819ca67000 RBX: ffffffffb6a1cac0 RCX: ffffffffb589d225 [ 12.049613] RDX: ffffed102a90618b RSI: 0000000000000004 RDI: 0000000000041244 [ 12.049655] RBP: ffffffffb6a07de0 R08: 0000000000000001 R09: ffffed102a90618a [ 12.049713] R10: ffff888154830c53 R11: 000000000000f400 R12: 0000000000000000 [ 12.049755] R13: fffffbfff6d43958 R14: ffffffffb75b8c90 R15: 0000000000000000 [ 12.049811] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 12.049865] ? default_idle+0xd/0x20 [ 12.049887] arch_cpu_idle+0xd/0x20 [ 12.049907] default_idle_call+0x48/0x80 [ 12.049928] do_idle+0x379/0x4f0 [ 12.049967] ? __pfx_do_idle+0x10/0x10 [ 12.049988] ? trace_preempt_on+0x20/0xc0 [ 12.050011] ? schedule+0x86/0x2e0 [ 12.050028] ? preempt_count_sub+0x50/0x80 [ 12.050054] cpu_startup_entry+0x5c/0x70 [ 12.050076] rest_init+0x11a/0x140 [ 12.050095] ? acpi_subsystem_init+0x5d/0x150 [ 12.050119] start_kernel+0x330/0x410 [ 12.050142] x86_64_start_reservations+0x1c/0x30 [ 12.050164] x86_64_start_kernel+0x10d/0x120 [ 12.050186] common_startup_64+0x13e/0x148 [ 12.050218] </TASK> [ 12.050231] [ 12.066266] Allocated by task 223: [ 12.066537] kasan_save_stack+0x45/0x70 [ 12.066710] kasan_save_track+0x18/0x40 [ 12.066875] kasan_save_alloc_info+0x3b/0x50 [ 12.067067] __kasan_kmalloc+0xb7/0xc0 [ 12.067224] __kmalloc_cache_noprof+0x189/0x420 [ 12.067452] rcu_uaf+0xb0/0x330 [ 12.067624] kunit_try_run_case+0x1a5/0x480 [ 12.068379] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.068617] kthread+0x337/0x6f0 [ 12.068750] ret_from_fork+0x116/0x1d0 [ 12.069086] ret_from_fork_asm+0x1a/0x30 [ 12.069379] [ 12.069539] Freed by task 0: [ 12.069691] kasan_save_stack+0x45/0x70 [ 12.070035] kasan_save_track+0x18/0x40 [ 12.070235] kasan_save_free_info+0x3f/0x60 [ 12.070639] __kasan_slab_free+0x56/0x70 [ 12.070837] kfree+0x222/0x3f0 [ 12.071123] rcu_uaf_reclaim+0x1f/0x60 [ 12.071318] rcu_core+0x66f/0x1c40 [ 12.071469] rcu_core_si+0x12/0x20 [ 12.071780] handle_softirqs+0x209/0x730 [ 12.071948] __irq_exit_rcu+0xc9/0x110 [ 12.072124] irq_exit_rcu+0x12/0x20 [ 12.072280] sysvec_apic_timer_interrupt+0x81/0x90 [ 12.072780] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 12.072989] [ 12.073093] Last potentially related work creation: [ 12.073700] kasan_save_stack+0x45/0x70 [ 12.073865] kasan_record_aux_stack+0xb2/0xc0 [ 12.074086] __call_rcu_common.constprop.0+0x7b/0x9e0 [ 12.074302] call_rcu+0x12/0x20 [ 12.074463] rcu_uaf+0x168/0x330 [ 12.074886] kunit_try_run_case+0x1a5/0x480 [ 12.075069] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.075433] kthread+0x337/0x6f0 [ 12.075664] ret_from_fork+0x116/0x1d0 [ 12.075799] ret_from_fork_asm+0x1a/0x30 [ 12.076025] [ 12.076119] The buggy address belongs to the object at ffff888102a265c0 [ 12.076119] which belongs to the cache kmalloc-32 of size 32 [ 12.076583] The buggy address is located 0 bytes inside of [ 12.076583] freed 32-byte region [ffff888102a265c0, ffff888102a265e0) [ 12.077054] [ 12.077153] The buggy address belongs to the physical page: [ 12.077374] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a26 [ 12.077701] flags: 0x200000000000000(node=0|zone=2) [ 12.077911] page_type: f5(slab) [ 12.078653] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 12.078913] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 12.079356] page dumped because: kasan: bad access detected [ 12.079773] [ 12.079877] Memory state around the buggy address: [ 12.080256] ffff888102a26480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 12.080484] ffff888102a26500: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 12.080973] >ffff888102a26580: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 12.081345] ^ [ 12.081763] ffff888102a26600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.082170] ffff888102a26680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.082606] ==================================================================