task:kworker/0:4 state:R running task stack:0 pid:3910 tgid:3910 ppid:2 task_flags:0x4288060 flags:0x00000000 Workqueue: usb_hub_wq hub_event Call Trace: [] context_switch kernel/sched/core.c:5357 [inline] [] __schedule+0x1042/0x4106 kernel/sched/core.c:6961 ================================================================== BUG: KASAN: stack-out-of-bounds in walk_stackframe+0x3e0/0x44e arch/riscv/kernel/stacktrace.c:67 Read of size 8 at addr ffff8f80047d6df8 by task kworker/1:1/3247 CPU: 1 UID: 0 PID: 3247 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT Hardware name: riscv-virtio,qemu (DT) Workqueue: events_power_efficient neigh_periodic_work Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132 [] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138 [] __dump_stack lib/dump_stack.c:94 [inline] [] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120 [] print_address_description mm/kasan/report.c:378 [inline] [] print_report+0x28e/0x5a2 mm/kasan/report.c:482 [] kasan_report+0xf0/0x214 mm/kasan/report.c:595 [] __asan_report_load8_noabort+0x12/0x1a mm/kasan/report_generic.c:381 [] walk_stackframe+0x3e0/0x44e arch/riscv/kernel/stacktrace.c:67 [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:132 [] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:138 [] sched_show_task kernel/sched/core.c:7933 [inline] [] sched_show_task+0x460/0x61c kernel/sched/core.c:7908 [] show_state_filter+0xcc/0x302 kernel/sched/core.c:7978 [] show_state include/linux/sched/debug.h:21 [inline] [] fn_show_state+0x1a/0x22 drivers/tty/vt/keyboard.c:613 [] k_spec drivers/tty/vt/keyboard.c:666 [inline] [] k_spec+0x102/0x16c drivers/tty/vt/keyboard.c:655 [] kbd_keycode drivers/tty/vt/keyboard.c:1515 [inline] [] kbd_event+0x8ac/0x10b6 drivers/tty/vt/keyboard.c:1534 [] input_handle_events_default+0xfe/0x174 drivers/input/input.c:2575 [] input_pass_values+0x6f4/0x7f6 drivers/input/input.c:127 [] input_event_dispose drivers/input/input.c:341 [inline] [] input_handle_event+0x232/0x13e6 drivers/input/input.c:369 [] input_repeat_key+0x24c/0x340 drivers/input/input.c:2262 [] call_timer_fn+0x202/0xab8 kernel/time/timer.c:1747 [] expire_timers kernel/time/timer.c:1798 [inline] [] __run_timers+0x944/0xcf4 kernel/time/timer.c:2372 [] __run_timer_base kernel/time/timer.c:2384 [inline] [] __run_timer_base kernel/time/timer.c:2376 [inline] [] run_timer_base+0x136/0x1b6 kernel/time/timer.c:2393 [] run_timer_softirq+0x1c/0x52 kernel/time/timer.c:2403 [] handle_softirqs+0x4b2/0x132e kernel/softirq.c:579 [] __do_softirq kernel/softirq.c:613 [inline] [] invoke_softirq kernel/softirq.c:453 [inline] [] __irq_exit_rcu+0x18c/0x550 kernel/softirq.c:680 [] irq_exit_rcu+0x10/0xf8 kernel/softirq.c:696 [] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:390 [] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:360 The buggy address belongs to a 8-page vmalloc region starting at 0xffff8f80047d0000 allocated at kernel_clone+0x128/0xd9e kernel/fork.c:2605 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb290e flags: 0xffe000000000000(node=0|zone=0|lastcpupid=0x7ff) raw: 0ffe000000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_ZERO|__GFP_NOWARN), pid 3591, tgid 3591 (kworker/u9:2), ts 1018543568600, free_ts 1017976840600 __set_page_owner+0x94/0x4a8 mm/page_owner.c:329 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xdc/0x1ba mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x7fa/0x359a mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x22e/0x2120 mm/page_alloc.c:5148 alloc_pages_mpol+0x1fa/0x5bc mm/mempolicy.c:2416 alloc_frozen_pages_noprof+0x174/0x2f0 mm/mempolicy.c:2487 alloc_pages_noprof+0x20/0x48 mm/mempolicy.c:2507 vm_area_alloc_pages mm/vmalloc.c:3642 [inline] __vmalloc_area_node mm/vmalloc.c:3720 [inline] __vmalloc_node_range_noprof+0x624/0x11b0 mm/vmalloc.c:3893 __vmalloc_node_noprof+0x104/0x136 mm/vmalloc.c:3956 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct kernel/fork.c:882 [inline] copy_process+0x32ec/0x72da kernel/fork.c:2004 kernel_clone+0x128/0xd9e kernel/fork.c:2605 user_mode_thread+0xd4/0x110 kernel/fork.c:2683 call_usermodehelper_exec_sync kernel/umh.c:132 [inline] call_usermodehelper_exec_work+0x6c/0x1ac kernel/umh.c:163 process_one_work+0x96a/0x1f32 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x5ce/0xde8 kernel/workqueue.c:3400 kthread+0x39c/0x7d4 kernel/kthread.c:463 page last free pid 9 tgid 9 stack trace: __reset_page_owner+0x78/0x1ba mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0x836/0x145e mm/page_alloc.c:2895 ___free_pages+0x146/0x1c8 mm/page_alloc.c:5229 __free_pages+0xe/0x16 mm/page_alloc.c:5260 pagetable_free include/linux/mm.h:2898 [inline] pagetable_dtor_free include/linux/mm.h:2996 [inline] __tlb_remove_table include/asm-generic/tlb.h:220 [inline] __tlb_remove_table_free mm/mmu_gather.c:227 [inline] tlb_remove_table_rcu+0xde/0x160 mm/mmu_gather.c:290 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0xa24/0x1ef8 kernel/rcu/tree.c:2861 rcu_core_si+0xc/0x14 kernel/rcu/tree.c:2878 handle_softirqs+0x4b2/0x132e kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x18c/0x550 kernel/softirq.c:680 irq_exit_rcu+0x10/0xf8 kernel/softirq.c:696 handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:390 call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:360 Memory state around the buggy address: ffff8f80047d6c80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 ffff8f80047d6d00: 04 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8f80047d6d80: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ^ ffff8f80047d6e00: 04 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 ffff8f80047d6e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================