rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P24823/1:b..l (detected by 1, t=10502 jiffies, g=94269, q=1832) task:syz.0.5331 state:R running task stack:25040 pid:24823 ppid: 23374 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799 irqentry_exit+0x63/0x70 kernel/entry/common.c:432 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__cant_migrate+0x1/0x2f0 kernel/sched/core.c:9693 Code: 89 f9 80 e1 07 80 c1 03 38 c1 7c b5 41 89 f6 41 89 d5 e8 02 40 6a 00 44 89 ea 44 89 f6 eb a2 66 2e 0f 1f 84 00 00 00 00 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00 RSP: 0018:ffffc900030efaf0 EFLAGS: 00000246 RAX: ffffc900030efbe0 RBX: ffffc900030efd44 RCX: 0000000000080000 RDX: ffffc9001381c000 RSI: 0000000000000267 RDI: ffffffff8b240960 RBP: ffffc900030efc90 R08: ffff8880214f8007 R09: 1ffff1100429f000 R10: dffffc0000000000 R11: ffffed100429f001 R12: ffffc900030efd40 R13: ffffc90000db4030 R14: dffffc0000000000 R15: 0000000000000000 __bpf_prog_run include/linux/filter.h:615 [inline] bpf_prog_run include/linux/filter.h:635 [inline] bpf_test_run+0x27c/0x800 net/bpf/test_run.c:119 bpf_prog_test_run_skb+0x9cc/0x1180 net/bpf/test_run.c:674 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3374 __sys_bpf+0x5a5/0x6f0 kernel/bpf/syscall.c:4675 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline] __se_sys_bpf kernel/bpf/syscall.c:4759 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759 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: 0033:0x7f9f1217ce59 RSP: 002b:00007f9f103d6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9f123f5fa0 RCX: 00007f9f1217ce59 RDX: 0000000000000031 RSI: 0000200000000580 RDI: 000000000000000a RBP: 00007f9f12212d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9f123f6038 R14: 00007f9f123f5fa0 R15: 00007ffd3183f058