rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=601/1/0x4000000000000002 softirq=36189/36190 fqs=2100 (detected by 1, t=10505 jiffies, g=52861, q=877) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 12843 Comm: syz.8.2306 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:debug_lockdep_rcu_enabled+0x25/0x30 kernel/rcu/update.c:281 Code: 00 00 cc cc 00 31 c0 83 3d ab 2a c0 03 00 74 1d 83 3d 22 5d c0 03 00 74 14 65 48 8b 0d 14 fc 58 76 31 c0 83 b9 ec 0a 00 00 00 <0f> 94 c0 c3 00 00 cc cc 00 00 cc 41 56 53 89 fb e8 16 0a 00 00 41 RSP: 0018:ffffc9000304f218 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff8880772ec1a8 RCX: ffff88807d929dc0 RDX: 0000000000000000 RSI: 00000000ffffffe4 RDI: 0000000000000000 RBP: ffffc9000304f338 R08: dffffc0000000000 R09: fffffbfff1ad33a6 R10: fffffbfff1ad33a6 R11: 1ffffffff1ad33a5 R12: 00000000ffffffe4 R13: 1ffff92000609e48 R14: ffffc9000304f260 R15: ffffc9000304f480 FS: 00007f42e15686c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005cc11000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_read_unlock include/linux/rcupdate.h:769 [inline] __perf_event_output kernel/events/core.c:7813 [inline] perf_event_output_forward+0x19c/0x280 kernel/events/core.c:7822 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515 perf_swevent_overflow kernel/events/core.c:9591 [inline] perf_swevent_event+0x4ad/0x530 kernel/events/core.c:9629 perf_tp_event+0x32c/0xb50 kernel/events/core.c:10047 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021 perf_trace_preemptirq_template+0x2be/0x380 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44 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:ffffc9000304f8e0 EFLAGS: 00000206 RAX: 603a32178c126000 RBX: 1ffff92000609f20 RCX: 603a32178c126000 RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: ffffffff8a59e580 RBP: ffffc9000304f9a8 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] percpu_ref_put_many include/linux/percpu-refcount.h:324 [inline] percpu_ref_put+0xcc/0x150 include/linux/percpu-refcount.h:338 memcg_kmem_uncharge_page include/linux/memcontrol.h:1703 [inline] free_thread_stack+0x22e/0x430 kernel/fork.c:283 release_task_stack kernel/fork.c:433 [inline] put_task_stack+0x97/0x140 kernel/fork.c:444 finish_task_switch+0x26f/0x640 kernel/sched/core.c:4961 context_switch kernel/sched/core.c:5052 [inline] __schedule+0x11c3/0x4390 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:__sock_create+0x4a3/0x900 net/socket.c:1509 Code: ff 17 41 89 c7 31 ff 89 c6 e8 a9 7a aa f9 45 85 ff 0f 88 3e 01 00 00 49 8d 9c 24 60 ff ff ff 48 89 d8 48 c1 e8 03 80 3c 28 00 <74> 08 48 89 df e8 43 df ee f9 48 8b 1b 48 83 c3 08 48 89 d8 48 c1 RSP: 0018:ffffc9000304fe38 EFLAGS: 00000246 RAX: 1ffff1100e87e244 RBX: ffff8880743f1220 RCX: ffff88807d929dc0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffed1017207662 R10: ffffed1017207662 R11: 1ffff11017207661 R12: ffff8880743f12c0 R13: 0000000000000001 R14: 0000000000000025 R15: 0000000000000000 sock_create net/socket.c:1552 [inline] __sys_socket+0xe2/0x170 net/socket.c:1594 __do_sys_socket net/socket.c:1603 [inline] __se_sys_socket net/socket.c:1601 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1601 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: 0033:0x7f42e33226c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f42e1568038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f42e3579090 RCX: 00007f42e33226c9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000025 RBP: 00007f42e33a4f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f42e3579128 R14: 00007f42e3579090 R15: 00007fff438d5528