rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10882 ticks this GP) idle=b72/1/0x4000000000000002 softirq=20932/20934 fqs=5236 (t=10502 jiffies g=35029 q=450) NMI backtrace for cpu 0 CPU: 0 PID: 12685 Comm: syz-executor.2 Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x19b/0x1e5 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:475 [inline] check_cpu_stall kernel/rcu/tree_stall.h:549 [inline] rcu_pending kernel/rcu/tree.c:3225 [inline] rcu_sched_clock_irq.cold+0x55d/0xcfa kernel/rcu/tree.c:2296 update_process_times+0x25/0x60 kernel/time/timer.c:1727 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x4e/0x140 kernel/time/tick-sched.c:1320 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x5ca/0xed0 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline] smp_apic_timer_interrupt+0x15b/0x600 arch/x86/kernel/apic/apic.c:1138 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:debug_lockdep_rcu_enabled.part.0+0x33/0x50 kernel/rcu/update.c:276 Code: df 53 65 48 8b 1c 25 00 1f 02 00 48 8d bb c4 08 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 <84> d2 75 0f 8b 93 c4 08 00 00 31 c0 5b 85 d2 0f 94 c0 c3 e8 75 60 RSP: 0018:ffffc900045bfda8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff88804e09a580 RCX: 1ffffffff1513952 RDX: 0000000000000000 RSI: 1ffff11009c135c8 RDI: ffff88804e09ae44 RBP: ffffffff8837c080 R08: 0000000000000001 R09: ffffed1014ed4861 R10: ffff8880a76a4307 R11: ffffed1014ed4860 R12: 0000000000001c9b R13: ffff8880a76a4160 R14: ffff8880a76a4110 R15: ffffffff81d54820 ___might_sleep+0x2b/0x2b0 kernel/sched/core.c:6766 io_ring_ctx_wait_and_kill+0xa9/0x5f0 fs/io_uring.c:7323 io_uring_release+0x3e/0x50 fs/io_uring.c:7345 __fput+0x33e/0x880 fs/file_table.c:280 task_work_run+0xf4/0x1b0 kernel/task_work.c:123 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x2fa/0x360 arch/x86/entry/common.c:165 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:305 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x416621 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffde9fe0710 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000416621 RDX: 0000000000000000 RSI: 0000000000000081 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000790c88 R09: 0000000000000000 R10: 00007ffde9fe07f0 R11: 0000000000000293 R12: 0000000000790c90 R13: 0000000000000001 R14: ffffffffffffffff R15: 000000000078bfac