[<ffffffff859082fa>] raw_irqentry_exit_cond_resched kernel/entry/common.c:305 [inline]
[<ffffffff859082fa>] raw_irqentry_exit_cond_resched kernel/entry/common.c:297 [inline]
[<ffffffff859082fa>] irqentry_exit+0x138/0x17a kernel/entry/common.c:348
[<ffffffff859070bc>] do_irq+0x34/0x4c arch/riscv/kernel/traps.c:375
[<ffffffff85928618>] ret_from_exception+0x0/0x64 arch/riscv/kernel/entry.S:112
==================================================================
BUG: KASAN: stack-out-of-bounds in walk_stackframe+0x40e/0x410 arch/riscv/kernel/stacktrace.c:69
Read of size 8 at addr ff2000000121bb00 by task klogd/2818

CPU: 1 PID: 2818 Comm: klogd Not tainted 6.8.0-rc1-syzkaller #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80010868>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:121
[<ffffffff858a9b60>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:127
[<ffffffff85904e9c>] __dump_stack lib/dump_stack.c:88 [inline]
[<ffffffff85904e9c>] dump_stack_lvl+0xe8/0x154 lib/dump_stack.c:106
[<ffffffff858b45e0>] print_address_description mm/kasan/report.c:377 [inline]
[<ffffffff858b45e0>] print_report+0x26e/0x57e mm/kasan/report.c:488
[<ffffffff80899772>] kasan_report+0xf0/0x1b8 mm/kasan/report.c:601
[<ffffffff8089b59e>] __asan_report_load8_noabort+0x12/0x1a mm/kasan/report_generic.c:381
[<ffffffff800107b8>] walk_stackframe+0x40e/0x410 arch/riscv/kernel/stacktrace.c:69
[<ffffffff80010868>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:121
[<ffffffff858a9b60>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:127
[<ffffffff8016a578>] sched_show_task kernel/sched/core.c:9171 [inline]
[<ffffffff8016a578>] sched_show_task+0x446/0x5c0 kernel/sched/core.c:9145
[<ffffffff8017d29a>] show_state_filter+0xcc/0x28e kernel/sched/core.c:9216
[<ffffffff818f2ea4>] show_state include/linux/sched/debug.h:21 [inline]
[<ffffffff818f2ea4>] fn_show_state+0x1a/0x22 drivers/tty/vt/keyboard.c:614
[<ffffffff818f3552>] k_spec drivers/tty/vt/keyboard.c:667 [inline]
[<ffffffff818f3552>] k_spec+0xf8/0x140 drivers/tty/vt/keyboard.c:656
[<ffffffff818f5d16>] kbd_keycode drivers/tty/vt/keyboard.c:1524 [inline]
[<ffffffff818f5d16>] kbd_event+0x856/0xf54 drivers/tty/vt/keyboard.c:1543
[<ffffffff836fe5b4>] input_to_handler+0x374/0x466 drivers/input/input.c:132
[<ffffffff837058ba>] input_pass_values+0x54a/0x7d0 drivers/input/input.c:161
[<ffffffff83705fe0>] input_event_dispose+0x4a0/0x5a0 drivers/input/input.c:389
[<ffffffff837087b2>] input_handle_event+0x11e/0xc9e drivers/input/input.c:406
[<ffffffff837093c8>] input_event drivers/input/input.c:435 [inline]
[<ffffffff837093c8>] input_event+0x96/0xc8 drivers/input/input.c:427
[<ffffffff83fafe02>] hidinput_hid_event+0x7d0/0x238e drivers/hid/hid-input.c:1731
[<ffffffff83f98956>] hid_process_event+0x48a/0x59e drivers/hid/hid-core.c:1541
[<ffffffff83f98f04>] hid_input_array_field+0x49a/0x66a drivers/hid/hid-core.c:1653
[<ffffffff83f99aa2>] hid_process_report drivers/hid/hid-core.c:1695 [inline]
[<ffffffff83f99aa2>] hid_report_raw_event+0x9ce/0x10a6 drivers/hid/hid-core.c:2016
[<ffffffff83f9a470>] hid_input_report+0x2f6/0x3fa drivers/hid/hid-core.c:2090
[<ffffffff840e0930>] hid_irq_in+0x31c/0x6d0 drivers/hid/usbhid/hid-core.c:284
[<ffffffff83085b00>] __usb_hcd_giveback_urb+0x34a/0x5d4 drivers/usb/core/hcd.c:1650
[<ffffffff830860e4>] usb_hcd_giveback_urb+0x35a/0x3fc drivers/usb/core/hcd.c:1733
[<ffffffff83528c22>] dummy_timer+0x1318/0x3348 drivers/usb/gadget/udc/dummy_hcd.c:1987
[<ffffffff802ea156>] call_timer_fn+0x1cc/0x7fe kernel/time/timer.c:1700
[<ffffffff802eafb8>] expire_timers kernel/time/timer.c:1751 [inline]
[<ffffffff802eafb8>] __run_timers+0x830/0xae0 kernel/time/timer.c:2038
[<ffffffff802eb2be>] run_timer_softirq+0x56/0xb6 kernel/time/timer.c:2051
[<ffffffff85928c6c>] __do_softirq+0x480/0xfe2 kernel/softirq.c:553
[<ffffffff800d2af0>] invoke_softirq kernel/softirq.c:427 [inline]
[<ffffffff800d2af0>] __irq_exit_rcu kernel/softirq.c:632 [inline]
[<ffffffff800d2af0>] irq_exit_rcu+0x220/0x3c2 kernel/softirq.c:644
[<ffffffff8590696c>] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:363
[<ffffffff85928762>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:258

The buggy address belongs to the virtual mapping at
 [ff20000001218000, ff2000000121d000) created by:
 kernel_clone+0x11e/0xa16 kernel/fork.c:2901

The buggy address belongs to the physical page:
page:ff1c000002564000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95900
memcg:ff60000015f58302
flags: 0xffe000000000000(node=0|zone=0|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 0ffe000000000000 0000000000000000 0000000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ff60000015f58302
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 13794, tgid 13794 (kworker/u6:0), ts 3858341497400, free_ts 3856282681900
 __set_page_owner+0x32/0x31e mm/page_owner.c:195
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x9c/0xfc mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0x882/0x23e8 mm/page_alloc.c:3311
 __alloc_pages+0x1ee/0x2032 mm/page_alloc.c:4567
 alloc_pages_mpol+0xf8/0x46e mm/mempolicy.c:2133
 alloc_pages+0x1f6/0x246 mm/mempolicy.c:2204
 vm_area_alloc_pages mm/vmalloc.c:3063 [inline]
 __vmalloc_area_node mm/vmalloc.c:3139 [inline]
 __vmalloc_node_range+0x968/0x1316 mm/vmalloc.c:3320
 alloc_thread_stack_node kernel/fork.c:307 [inline]
 dup_task_struct kernel/fork.c:1112 [inline]
 copy_process+0x2c2a/0x6b54 kernel/fork.c:2326
 kernel_clone+0x11e/0xa16 kernel/fork.c:2901
 user_mode_thread+0xea/0x11a kernel/fork.c:2979
 call_usermodehelper_exec_work kernel/umh.c:172 [inline]
 call_usermodehelper_exec_work+0xd4/0x1ac kernel/umh.c:158
 process_one_work+0x7ce/0x179c kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0xadc/0x10f8 kernel/workqueue.c:2787
 kthread+0x28c/0x3a6 kernel/kthread.c:388
 ret_from_fork+0xe/0x1c arch/riscv/kernel/entry.S:229
page last free pid 14284 tgid 14284 stack trace:
 __reset_page_owner+0x54/0x20c mm/page_owner.c:150
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x3d0/0xae2 mm/page_alloc.c:2346
 free_unref_page+0x90/0x422 mm/page_alloc.c:2486
 free_the_page mm/page_alloc.c:563 [inline]
 __free_pages+0x152/0x190 mm/page_alloc.c:4653
 vfree+0x1c2/0xa82 mm/vmalloc.c:2842
 delayed_vfree_work+0x58/0x7a mm/vmalloc.c:2763
 process_one_work+0x7ce/0x179c kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0xadc/0x10f8 kernel/workqueue.c:2787
 kthread+0x28c/0x3a6 kernel/kthread.c:388
 ret_from_fork+0xe/0x1c arch/riscv/kernel/entry.S:229

Memory state around the buggy address:
 ff2000000121ba00: 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00
 ff2000000121ba80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ff2000000121bb00: f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00 00 00 00 00
                   ^
 ff2000000121bb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ff2000000121bc00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 04 f2 00 00
==================================================================