rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6353/1:b..l (detected by 1, t=10503 jiffies, g=18841, q=1645) task:syz.1.681 state:R running task stack:25312 pid: 6353 ppid: 4181 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6552 preempt_schedule+0xa7/0xb0 kernel/sched/core.c:6577 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0xf6/0x100 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline] __bpf_ringbuf_reserve+0x452/0x590 kernel/bpf/ringbuf.c:366 ____bpf_ringbuf_output kernel/bpf/ringbuf.c:454 [inline] bpf_ringbuf_output+0x65/0x1e0 kernel/bpf/ringbuf.c:444 bpf_prog_cf8c7f0b289ea32e+0x3d/0xa7c __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run_xdp include/linux/filter.h:810 [inline] bpf_test_run+0x355/0x7d0 net/bpf/test_run.c:117 bpf_prog_test_run_xdp+0x3fc/0x920 net/bpf/test_run.c:812 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3368 __sys_bpf+0x535/0x670 kernel/bpf/syscall.c:4669 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline] __se_sys_bpf kernel/bpf/syscall.c:4753 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f4518f9fbe9 RSP: 002b:00007f4517207038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f45191c6fa0 RCX: 00007f4518f9fbe9 RDX: 0000000000000050 RSI: 00002000000003c0 RDI: 000000000000000a RBP: 00007f4519022e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f45191c7038 R14: 00007f45191c6fa0 R15: 00007ffff5545af8