INFO: task syz-executor.5:21477 can't die for more than 143 seconds.
task:syz-executor.5  state:R  running task     stack:27912 pid:21477 ppid:  8569 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x8eb/0x21b0 kernel/sched/core.c:5078
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:5340
 irqentry_exit_cond_resched kernel/entry/common.c:393 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:385 [inline]
 irqentry_exit+0x7a/0xa0 kernel/entry/common.c:423
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:lock_is_held_type+0xc2/0x100 kernel/locking/lockdep.c:5481
Code: 03 44 39 f0 41 0f 94 c4 48 c7 c7 40 b8 6b 89 e8 44 0b 00 00 b8 ff ff ff ff 65 0f c1 05 c7 da e6 76 83 f8 01 75 23 ff 34 24 9d <48> 83 c4 08 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 e4 eb
RSP: 82a2e5f0:ffff888080b286c0 EFLAGS: ffffc9001688f7d0 ORIG_RAX: ffffed100f1e26c0
==================================================================
BUG: KASAN: stack-out-of-bounds in __show_regs.cold+0x4e/0x508 arch/x86/kernel/process_64.c:80
Read of size 8 at addr ffffc9001688f700 by task khungtaskd/1655

CPU: 1 PID: 1655 Comm: khungtaskd Not tainted 5.10.0-next-20201223-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5/0x2f8 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:396 [inline]
 kasan_report.cold+0x79/0xd5 mm/kasan/report.c:413
 __show_regs.cold+0x4e/0x508 arch/x86/kernel/process_64.c:80
 show_trace_log_lvl+0x2a7/0x2fd arch/x86/kernel/dumpstack.c:298
 sched_show_task kernel/sched/core.c:7008 [inline]
 sched_show_task+0x470/0x5c0 kernel/sched/core.c:6982
 check_killed_task kernel/hung_task.c:183 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:241 [inline]
 watchdog.cold+0xd8/0x31d kernel/hung_task.c:338
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296


Memory state around the buggy address:
 ffffc9001688f600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9001688f680: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f3
>ffffc9001688f700: f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                   ^
 ffffc9001688f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9001688f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================