rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1):
------------[ cut here ]------------
IRQs not enabled as expected
WARNING: CPU: 1 PID: 22580 at kernel/sched/core.c:2701 try_invoke_on_locked_down_task+0x2bf/0x370 kernel/sched/core.c:2701
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 22580 Comm: syz-executor620 Not tainted 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:540
RIP: 0010:try_invoke_on_locked_down_task+0x2bf/0x370 kernel/sched/core.c:2701
Code: ff d4 41 89 c6 e9 18 ff ff ff 80 3d a9 46 59 09 00 0f 85 6f fe ff ff 48 c7 c7 80 41 4b 88 c6 05 95 46 59 09 01 e8 d3 4b f4 ff <0f> 0b e9 55 fe ff ff 4c 89 04 24 4c 89 ee 48 89 ef 41 ff d4 4c 8b
RSP: 0018:ffffc90000da8bd8 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 1ffff920001b517d RCX: 0000000000000000
RDX: ffff8880a4702380 RSI: ffffffff815d4ef7 RDI: fffff520001b516d
RBP: ffff888093646240 R08: 0000000000000001 R09: ffff8880ae720fcb
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8160c610
R13: ffffc90000da8d00 R14: ffff8880a4702380 R15: ffff8880ae736c00
 rcu_print_task_stall kernel/rcu/tree_stall.h:269 [inline]
 print_other_cpu_stall kernel/rcu/tree_stall.h:477 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:636 [inline]
 rcu_pending kernel/rcu/tree.c:3489 [inline]
 rcu_sched_clock_irq.cold+0x92e/0xccc kernel/rcu/tree.c:2504
 update_process_times+0x25/0x60 kernel/time/timer.c:1737
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x108/0x290 kernel/time/tick-sched.c:1320
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_apic_timer_interrupt+0xe0/0x120 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585
RIP: 0010:bvec_iter_advance include/linux/bvec.h:110 [inline]
RIP: 0010:iov_iter_copy_from_user_atomic+0x623/0xbe0 lib/iov_iter.c:1000
Code: 00 e8 51 ca dd fd 48 8b 44 24 28 80 38 00 0f 85 39 05 00 00 48 8b 04 24 4c 8b 60 18 e8 36 ca dd fd 41 01 ef 31 ff 29 6c 24 14 <44> 89 fe e8 a5 c6 dd fd 45 85 ff 75 20 eb 58 e8 19 ca dd fd 41 29
RSP: 0018:ffffc90008d376f0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8395f21b
RDX: ffff8880a4702380 RSI: ffffffff8395f29a RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888080ce1b7f
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809df03400
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
 generic_perform_write+0x277/0x4f0 mm/filemap.c:3326
 ext4_buffered_write_iter+0x235/0x4a0 fs/ext4/file.c:270
 ext4_file_write_iter+0x1f3/0x13d0 fs/ext4/file.c:655
 call_write_iter include/linux/fs.h:1908 [inline]
 do_iter_readv_writev+0x567/0x780 fs/read_write.c:713
 do_iter_write+0x188/0x5f0 fs/read_write.c:1018
 vfs_iter_write+0x70/0xa0 fs/read_write.c:1059
 iter_file_splice_write+0x721/0xbe0 fs/splice.c:750
 do_splice_from fs/splice.c:846 [inline]
 do_splice+0xbcd/0x1820 fs/splice.c:1144
 __do_sys_splice fs/splice.c:1419 [inline]
 __se_sys_splice fs/splice.c:1401 [inline]
 __x64_sys_splice+0x198/0x250 fs/splice.c:1401
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x449cd9
Code: e8 3c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f32eae63da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000006dfc48 RCX: 0000000000449cd9
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000006dfc40 R08: 0000000000010005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc4c
R13: 00007ffcc99b8b4f R14: 00007f32eae649c0 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..