[] context_switch kernel/sched/core.c:5325 [inline] [] __schedule+0x1042/0x4114 kernel/sched/core.c:6929 [] preempt_schedule_common kernel/sched/core.c:7113 [inline] [] preempt_schedule+0xd2/0x1e2 kernel/sched/core.c:7137 [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] [] _raw_spin_unlock_irqrestore+0xb4/0xd6 kernel/locking/spinlock.c:194 ================================================================== BUG: KASAN: stack-out-of-bounds in walk_stackframe+0x3e0/0x44e arch/riscv/kernel/stacktrace.c:67 Read of size 8 at addr ffff8f80001179f8 by task kworker/u8:7/4232 CPU: 1 UID: 0 PID: 4232 Comm: kworker/u8:7 Not tainted syzkaller #0 PREEMPT Hardware name: riscv-virtio,qemu (DT) Workqueue: events_unbound nsim_dev_trap_report_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+0x12a/0x1a2 lib/dump_stack.c:120 [] print_address_description mm/kasan/report.c:378 [inline] [] print_report+0x28c/0x59e mm/kasan/report.c:482 [] kasan_report+0xf0/0x218 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:7901 [inline] [] sched_show_task+0x460/0x61c kernel/sched/core.c:7876 [] show_state_filter+0xcc/0x302 kernel/sched/core.c:7946 [] 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:2541 [] input_pass_values+0x6f4/0x7f6 drivers/input/input.c:128 [] input_event_dispose drivers/input/input.c:353 [inline] [] input_handle_event+0x536/0x13e6 drivers/input/input.c:370 [] input_event drivers/input/input.c:396 [inline] [] input_event+0x9c/0xe6 drivers/input/input.c:391 [] hidinput_hid_event+0x86c/0x2402 drivers/hid/hid-input.c:1727 [] hid_process_event+0x48a/0x59e drivers/hid/hid-core.c:1565 [] hid_input_array_field+0x49e/0x66e drivers/hid/hid-core.c:1677 [] hid_process_report drivers/hid/hid-core.c:1719 [inline] [] hid_report_raw_event+0xa24/0x1146 drivers/hid/hid-core.c:2074 [] __hid_input_report.constprop.0+0x2f6/0x3fa drivers/hid/hid-core.c:2144 [] hid_input_report+0x32/0x44 drivers/hid/hid-core.c:2166 [] hid_irq_in+0x2f6/0x732 drivers/hid/usbhid/hid-core.c:286 [] __usb_hcd_giveback_urb+0x36e/0x61c drivers/usb/core/hcd.c:1661 [] usb_hcd_giveback_urb+0x364/0x3fe drivers/usb/core/hcd.c:1745 [] dummy_timer+0x134e/0x34a2 drivers/usb/gadget/udc/dummy_hcd.c:1995 [] __run_hrtimer kernel/time/hrtimer.c:1777 [inline] [] __hrtimer_run_queues+0x1bc/0xfa8 kernel/time/hrtimer.c:1841 [] hrtimer_run_softirq+0x144/0x2f6 kernel/time/hrtimer.c:1858 [] handle_softirqs+0x4b2/0x1332 kernel/softirq.c:622 [] __do_softirq+0x12/0x1a kernel/softirq.c:656 [] ___do_softirq+0x18/0x20 arch/riscv/kernel/irq.c:119 [] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:361 The buggy address belongs to a 8-page vmalloc region starting at 0xffff8f8000110000 allocated at kernel_clone+0x128/0xda2 kernel/fork.c:2609 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9368a 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 2, tgid 2 (kthreadd), ts 1066956200, free_ts 0 __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:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0xdfc/0x3672 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x22e/0x2124 mm/page_alloc.c:5183 alloc_pages_mpol+0x1fa/0x5be 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:3647 [inline] __vmalloc_area_node mm/vmalloc.c:3724 [inline] __vmalloc_node_range_noprof+0x62a/0x121e mm/vmalloc.c:3897 __vmalloc_node_noprof+0x104/0x142 mm/vmalloc.c:3960 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct kernel/fork.c:881 [inline] copy_process+0x330a/0x72e6 kernel/fork.c:2012 kernel_clone+0x128/0xda2 kernel/fork.c:2609 kernel_thread+0xde/0x11c kernel/fork.c:2670 create_kthread kernel/kthread.c:486 [inline] kthreadd+0x49a/0x73c kernel/kthread.c:846 ret_from_fork_kernel+0x2a/0xbc6 arch/riscv/kernel/process.c:214 ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:328 page_owner free stack trace missing Memory state around the buggy address: ffff8f8000117880: 00 00 00 00 f1 f1 f1 f1 f1 f1 00 00 00 00 00 f3 ffff8f8000117900: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8f8000117980: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ^ ffff8f8000117a00: 00 00 00 00 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 ffff8f8000117a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================