rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4392/1:b..l (detected by 1, t=10502 jiffies, g=8037, q=2342) task:syz.1.18 state:R running task stack:24592 pid: 4392 ppid: 4228 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:should_resched arch/x86/include/asm/preempt.h:103 [inline] RIP: 0010:__local_bh_enable_ip+0x13e/0x1c0 kernel/softirq.c:408 Code: 8a e8 16 0c 71 08 65 66 8b 05 8e 6a ba 7e 66 85 c0 75 54 bf 01 00 00 00 e8 bf 24 09 00 e8 6a 0d 36 00 fb 65 8b 05 3a 41 b9 7e <85> c0 75 05 e8 89 4e b7 ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00 RSP: 0018:ffffc9000342f560 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000000200 RCX: 9a06f248576df600 RDX: dffffc0000000000 RSI: ffffffff8a2b1c00 RDI: ffffffff8a79e740 RBP: ffffc9000342f5f0 R08: ffff8880b903b30b R09: 1ffff11017207661 R10: dffffc0000000000 R11: ffffed1017207662 R12: ffffffff87e16005 R13: 1ffff1100f31301c R14: dffffc0000000000 R15: 1ffff92000685eac rcu_read_unlock_bh include/linux/rcupdate.h:810 [inline] __dev_queue_xmit+0x1c51/0x2fd0 net/core/dev.c:4315 __bpf_tx_skb net/core/filter.c:2127 [inline] __bpf_redirect_no_mac net/core/filter.c:2161 [inline] __bpf_redirect+0x6ad/0xee0 net/core/filter.c:2184 ____bpf_clone_redirect net/core/filter.c:2455 [inline] bpf_clone_redirect+0x241/0x390 net/core/filter.c:2425 bpf_prog_b36a1f39e2fdd4f4+0x56/0x984 bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] bpf_test_run+0x2a8/0x800 net/bpf/test_run.c:119 bpf_prog_test_run_skb+0x9cc/0x1180 net/bpf/test_run.c:669 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: 0033:0x7f0d49949cb9 RSP: 002b:00007f0d47ba5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f0d49bc4fa0 RCX: 00007f0d49949cb9 RDX: 0000000000000050 RSI: 0000200000002300 RDI: 000000000000000a RBP: 00007f0d499b7bf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0d49bc5038 R14: 00007f0d49bc4fa0 R15: 00007ffd54980558