Date
July 12, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.902951] ================================================================== [ 19.903902] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x64/0x70 [ 19.904262] Read of size 4 at addr fff00000c599ed80 by task swapper/0/0 [ 19.904534] [ 19.904815] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.905370] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.905435] Hardware name: linux,dummy-virt (DT) [ 19.905499] Call trace: [ 19.905541] show_stack+0x20/0x38 (C) [ 19.905650] dump_stack_lvl+0x8c/0xd0 [ 19.905752] print_report+0x118/0x608 [ 19.906247] kasan_report+0xdc/0x128 [ 19.906547] __asan_report_load4_noabort+0x20/0x30 [ 19.907150] rcu_uaf_reclaim+0x64/0x70 [ 19.907480] rcu_core+0x9f4/0x1e20 [ 19.908127] rcu_core_si+0x18/0x30 [ 19.908877] handle_softirqs+0x374/0xb28 [ 19.909153] __do_softirq+0x1c/0x28 [ 19.909609] ____do_softirq+0x18/0x30 [ 19.909708] call_on_irq_stack+0x24/0x30 [ 19.910179] do_softirq_own_stack+0x24/0x38 [ 19.910396] __irq_exit_rcu+0x1fc/0x318 [ 19.910502] irq_exit_rcu+0x1c/0x80 [ 19.910617] el1_interrupt+0x38/0x58 [ 19.911200] el1h_64_irq_handler+0x18/0x28 [ 19.911961] el1h_64_irq+0x6c/0x70 [ 19.912595] arch_local_irq_enable+0x4/0x8 (P) [ 19.912837] do_idle+0x384/0x4e8 [ 19.913409] cpu_startup_entry+0x68/0x80 [ 19.913519] rest_init+0x160/0x188 [ 19.914065] start_kernel+0x30c/0x3d0 [ 19.914467] __primary_switched+0x8c/0xa0 [ 19.914775] [ 19.914848] Allocated by task 199: [ 19.915302] kasan_save_stack+0x3c/0x68 [ 19.915438] kasan_save_track+0x20/0x40 [ 19.915747] kasan_save_alloc_info+0x40/0x58 [ 19.916002] __kasan_kmalloc+0xd4/0xd8 [ 19.916262] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.916568] rcu_uaf+0xb0/0x2d8 [ 19.916701] kunit_try_run_case+0x170/0x3f0 [ 19.917008] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.917215] kthread+0x328/0x630 [ 19.917488] ret_from_fork+0x10/0x20 [ 19.917583] [ 19.917625] Freed by task 0: [ 19.918070] kasan_save_stack+0x3c/0x68 [ 19.918172] kasan_save_track+0x20/0x40 [ 19.918275] kasan_save_free_info+0x4c/0x78 [ 19.918370] __kasan_slab_free+0x6c/0x98 [ 19.918451] kfree+0x214/0x3c8 [ 19.918536] rcu_uaf_reclaim+0x28/0x70 [ 19.918634] rcu_core+0x9f4/0x1e20 [ 19.918717] rcu_core_si+0x18/0x30 [ 19.919459] handle_softirqs+0x374/0xb28 [ 19.919912] __do_softirq+0x1c/0x28 [ 19.920116] [ 19.920468] Last potentially related work creation: [ 19.920818] kasan_save_stack+0x3c/0x68 [ 19.921091] kasan_record_aux_stack+0xb4/0xc8 [ 19.921228] __call_rcu_common.constprop.0+0x74/0x8c8 [ 19.921475] call_rcu+0x18/0x30 [ 19.921579] rcu_uaf+0x14c/0x2d8 [ 19.921649] kunit_try_run_case+0x170/0x3f0 [ 19.921732] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.921841] kthread+0x328/0x630 [ 19.922260] ret_from_fork+0x10/0x20 [ 19.922845] [ 19.922922] The buggy address belongs to the object at fff00000c599ed80 [ 19.922922] which belongs to the cache kmalloc-32 of size 32 [ 19.923068] The buggy address is located 0 bytes inside of [ 19.923068] freed 32-byte region [fff00000c599ed80, fff00000c599eda0) [ 19.923236] [ 19.923309] The buggy address belongs to the physical page: [ 19.923426] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10599e [ 19.923617] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.923781] page_type: f5(slab) [ 19.923905] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.924023] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.924121] page dumped because: kasan: bad access detected [ 19.924200] [ 19.924243] Memory state around the buggy address: [ 19.924320] fff00000c599ec80: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 19.924443] fff00000c599ed00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.924585] >fff00000c599ed80: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 19.924713] ^ [ 19.924807] fff00000c599ee00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.924923] fff00000c599ee80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.925021] ==================================================================
[ 13.178777] ================================================================== [ 13.179374] BUG: KASAN: slab-use-after-free in rcu_uaf_reclaim+0x50/0x60 [ 13.179598] Read of size 4 at addr ffff888103abf140 by task swapper/0/0 [ 13.179852] [ 13.180081] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.180125] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.180136] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.180156] Call Trace: [ 13.180185] <IRQ> [ 13.180200] dump_stack_lvl+0x73/0xb0 [ 13.180230] print_report+0xd1/0x650 [ 13.180253] ? __virt_addr_valid+0x1db/0x2d0 [ 13.180276] ? rcu_uaf_reclaim+0x50/0x60 [ 13.180297] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.180321] ? rcu_uaf_reclaim+0x50/0x60 [ 13.180341] kasan_report+0x141/0x180 [ 13.180363] ? rcu_uaf_reclaim+0x50/0x60 [ 13.180388] __asan_report_load4_noabort+0x18/0x20 [ 13.180413] rcu_uaf_reclaim+0x50/0x60 [ 13.180434] rcu_core+0x66f/0x1c40 [ 13.180462] ? __pfx_rcu_core+0x10/0x10 [ 13.180483] ? ktime_get+0x6b/0x150 [ 13.180504] ? handle_softirqs+0x18e/0x730 [ 13.180529] rcu_core_si+0x12/0x20 [ 13.180548] handle_softirqs+0x209/0x730 [ 13.180568] ? hrtimer_interrupt+0x2fe/0x780 [ 13.180618] ? __pfx_handle_softirqs+0x10/0x10 [ 13.180644] __irq_exit_rcu+0xc9/0x110 [ 13.180664] irq_exit_rcu+0x12/0x20 [ 13.180683] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.180709] </IRQ> [ 13.180734] <TASK> [ 13.180756] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.180848] RIP: 0010:pv_native_safe_halt+0xf/0x20 [ 13.181086] 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 71 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 [ 13.181167] RSP: 0000:ffffffff88607dd8 EFLAGS: 00010202 [ 13.181258] RAX: ffff8881d1672000 RBX: ffffffff8861cac0 RCX: ffffffff87475105 [ 13.181303] RDX: ffffed102b60618b RSI: 0000000000000004 RDI: 0000000000005ed4 [ 13.181344] RBP: ffffffff88607de0 R08: 0000000000000001 R09: ffffed102b60618a [ 13.181384] R10: ffff88815b030c53 R11: 000000000001a800 R12: 0000000000000000 [ 13.181426] R13: fffffbfff10c3958 R14: ffffffff891b1490 R15: 0000000000000000 [ 13.181481] ? ct_kernel_exit.constprop.0+0xa5/0xd0 [ 13.181536] ? default_idle+0xd/0x20 [ 13.181558] arch_cpu_idle+0xd/0x20 [ 13.181579] default_idle_call+0x48/0x80 [ 13.181599] do_idle+0x379/0x4f0 [ 13.181625] ? __pfx_do_idle+0x10/0x10 [ 13.181656] ? trace_preempt_on+0x20/0xc0 [ 13.181680] ? schedule+0x86/0x2e0 [ 13.181699] ? preempt_count_sub+0x50/0x80 [ 13.181723] cpu_startup_entry+0x5c/0x70 [ 13.181742] rest_init+0x11a/0x140 [ 13.181769] ? acpi_subsystem_init+0x5d/0x150 [ 13.181794] start_kernel+0x330/0x410 [ 13.181819] x86_64_start_reservations+0x1c/0x30 [ 13.181845] x86_64_start_kernel+0x10d/0x120 [ 13.181869] common_startup_64+0x13e/0x148 [ 13.181900] </TASK> [ 13.181911] [ 13.197741] Allocated by task 216: [ 13.198006] kasan_save_stack+0x45/0x70 [ 13.198327] kasan_save_track+0x18/0x40 [ 13.198500] kasan_save_alloc_info+0x3b/0x50 [ 13.198721] __kasan_kmalloc+0xb7/0xc0 [ 13.199094] __kmalloc_cache_noprof+0x189/0x420 [ 13.199372] rcu_uaf+0xb0/0x330 [ 13.199503] kunit_try_run_case+0x1a5/0x480 [ 13.199882] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.200201] kthread+0x337/0x6f0 [ 13.200335] ret_from_fork+0x116/0x1d0 [ 13.200531] ret_from_fork_asm+0x1a/0x30 [ 13.200860] [ 13.200948] Freed by task 0: [ 13.201075] kasan_save_stack+0x45/0x70 [ 13.201267] kasan_save_track+0x18/0x40 [ 13.201443] kasan_save_free_info+0x3f/0x60 [ 13.201639] __kasan_slab_free+0x56/0x70 [ 13.202159] kfree+0x222/0x3f0 [ 13.202281] rcu_uaf_reclaim+0x1f/0x60 [ 13.202550] rcu_core+0x66f/0x1c40 [ 13.202869] rcu_core_si+0x12/0x20 [ 13.203006] handle_softirqs+0x209/0x730 [ 13.203304] __irq_exit_rcu+0xc9/0x110 [ 13.203555] irq_exit_rcu+0x12/0x20 [ 13.203806] sysvec_apic_timer_interrupt+0x81/0x90 [ 13.204040] asm_sysvec_apic_timer_interrupt+0x1f/0x30 [ 13.204264] [ 13.204370] Last potentially related work creation: [ 13.204598] kasan_save_stack+0x45/0x70 [ 13.205053] kasan_record_aux_stack+0xb2/0xc0 [ 13.205242] __call_rcu_common.constprop.0+0x7b/0x9e0 [ 13.205479] call_rcu+0x12/0x20 [ 13.205822] rcu_uaf+0x168/0x330 [ 13.205997] kunit_try_run_case+0x1a5/0x480 [ 13.206292] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.206584] kthread+0x337/0x6f0 [ 13.206784] ret_from_fork+0x116/0x1d0 [ 13.207070] ret_from_fork_asm+0x1a/0x30 [ 13.207275] [ 13.207384] The buggy address belongs to the object at ffff888103abf140 [ 13.207384] which belongs to the cache kmalloc-32 of size 32 [ 13.208102] The buggy address is located 0 bytes inside of [ 13.208102] freed 32-byte region [ffff888103abf140, ffff888103abf160) [ 13.208602] [ 13.208702] The buggy address belongs to the physical page: [ 13.209131] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103abf [ 13.209509] flags: 0x200000000000000(node=0|zone=2) [ 13.209729] page_type: f5(slab) [ 13.209995] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.210432] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.210840] page dumped because: kasan: bad access detected [ 13.211078] [ 13.211168] Memory state around the buggy address: [ 13.211362] ffff888103abf000: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.211643] ffff888103abf080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.212249] >ffff888103abf100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.212546] ^ [ 13.212939] ffff888103abf180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.213200] ffff888103abf200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.213584] ==================================================================