rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=daf/1/0x4000000000000002 softirq=71620/71621 fqs=5242 rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P21488/1:b..l (detected by 1, t=10502 jiffies, g=102017, q=1621) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:irq_enter_rcu+0x1e/0xe0 kernel/softirq.c:618 Code: 50 fe ff ff 0f 1f 84 00 00 00 00 00 41 56 53 49 be 00 00 00 00 00 fc ff df bf 00 00 01 00 e8 59 f2 08 00 48 c7 c7 a0 04 0a 8a ad 00 61 08 b8 01 00 00 00 65 0f c1 05 14 f8 b9 7e 85 c0 75 25 RSP: 0018:ffffc90000007fe0 EFLAGS: 00000006 RAX: 0000000000010100 RBX: ffffc90000d378d8 RCX: ffffffff960c4f03 RDX: 0000000000000100 RSI: ffffffff8a058100 RDI: ffffffff8a0a04a0 RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ad33a6 R10: fffffbfff1ad33a6 R11: ffffc90000007ff8 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3ae3e00940 CR3: 000000000be8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0x90/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713 RIP: 0010:rcu_read_unlock_special+0x84/0x480 kernel/rcu/tree_plugin.h:674 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 ed 11 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc90000d37980 EFLAGS: 00000206 RAX: cbe9c1e3b18a8300 RBX: 1ffff920001a6f34 RCX: cbe9c1e3b18a8300 RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: ffffffff8a59e580 RBP: ffffc90000d37a58 R08: dffffc0000000000 R09: ffffed1017207662 R10: ffffed1017207662 R11: 1ffff11017207661 R12: ffffffff8c120c00 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:772 [inline] ieee80211_iterate_active_interfaces_atomic+0x132/0x140 net/mac80211/util.c:831 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766 handle_softirqs+0x328/0x820 kernel/softirq.c:576 run_ksoftirqd+0x98/0xf0 kernel/softirq.c:943 smpboot_thread_fn+0x4f6/0x970 kernel/smpboot.c:164 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 task:syz.6.5734 state:R running task stack:27264 pid:21488 ppid: 20968 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11bb/0x4390 kernel/sched/core.c:6395 preempt_schedule_irq+0xb1/0x150 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+0x8/0x2e0 kernel/sched/core.c:9693 Code: b5 41 89 f6 41 89 d5 e8 56 26 69 00 44 89 ea 44 89 f6 eb a2 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41 57 41 56 <41> 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 65 48 8b 04 25 28 RSP: 0018:ffffc9000332fae0 EFLAGS: 00000246 RAX: ffffc9000332fbe0 RBX: ffffc9000332fd44 RCX: ffff888022130000 RDX: 0000000000000000 RSI: 0000000000000267 RDI: ffffffff8b03ea00 RBP: ffffc9000332faf0 R08: dffffc0000000000 R09: ffffed1004426001 R10: ffffed1004426001 R11: 1ffff11004426000 R12: ffffc9000332fd40 R13: ffffc90001176030 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+0x266/0x7d0 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+0x535/0x670 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: 0033:0x7f3ae3f276c9 RSP: 002b:00007f3ae218e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f3ae417dfa0 RCX: 00007f3ae3f276c9 RDX: 0000000000000050 RSI: 00002000000002c0 RDI: 000000000000000a RBP: 00007f3ae3fa9f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3ae417e038 R14: 00007f3ae417dfa0 R15: 00007ffc0ed678c8