rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=7b3/1/0x4000000000000002 softirq=18283/18286 fqs=5245 (detected by 1, t=10502 jiffies, g=21609, q=2482) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8069 Comm: syz.0.1093 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:debug_lockdep_rcu_enabled+0x25/0x30 kernel/rcu/update.c:281 Code: 00 00 cc cc 00 31 c0 83 3d 1b 12 cd 03 00 74 1d 83 3d 92 44 cd 03 00 74 14 65 48 8b 0d 44 90 45 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:ffffc90000006dd0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 00007f24dbbcd819 RCX: ffff88802cb98000 RDX: 0000000000000100 RSI: 00007f24dbbcd819 RDI: ffffffffa002c000 RBP: 0000000000000000 R08: dffffc0000000000 R09: 1ffffffff203aa18 R10: dffffc0000000000 R11: fffffbfff203aa19 R12: dffffc0000000000 R13: 0000000000000a80 R14: 0000000000000000 R15: ffffffffa002c000 FS: 00007f24d9e276c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000438e9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff3 DR7: 0000000000000600 Call Trace: rcu_read_unlock include/linux/rcupdate.h:769 [inline] is_bpf_text_address+0x1c3/0x270 kernel/bpf/core.c:727 kernel_text_address kernel/extable.c:151 [inline] __kernel_text_address+0x9a/0x100 kernel/extable.c:105 unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323 perf_callchain_kernel+0x34c/0x720 arch/x86/events/core.c:2784 get_perf_callchain+0x356/0x460 kernel/events/callchain.c:200 perf_callchain kernel/events/core.c:7606 [inline] perf_prepare_sample+0x352/0x1cd0 kernel/events/core.c:7633 __perf_event_output kernel/events/core.c:7802 [inline] perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7822 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515 perf_tp_event+0x383/0xbf0 kernel/events/core.c:10047 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021 perf_trace_preemptirq_template+0x2aa/0x360 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+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674 Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 32 e1 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 RSP: 0018:ffffc900000077a0 EFLAGS: 00000206 RAX: be2bc88515d4c100 RBX: 1ffff92000000ef8 RCX: be2bc88515d4c100 RDX: dffffc0000000000 RSI: ffffffff8a2b2800 RDI: ffffffff8a79fe40 RBP: ffffc90000007880 R08: ffff8880b903b30b R09: 1ffff11017207661 R10: dffffc0000000000 R11: ffffed1017207662 R12: ffffffff8c323000 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] netif_receive_skb_list_internal+0x961/0xbd0 net/core/dev.c:5786 gro_normal_list net/core/dev.c:5939 [inline] napi_complete_done+0x378/0x850 net/core/dev.c:6677 virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline] virtnet_poll+0x955/0xf40 drivers/net/virtio_net.c:1624 __napi_poll+0xc0/0x430 net/core/dev.c:7101 napi_poll net/core/dev.c:7168 [inline] net_rx_action+0x4d4/0xa10 net/core/dev.c:7258 handle_softirqs+0x339/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:lock_is_held_type+0x13a/0x190 kernel/locking/lockdep.c:5671 Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c5 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90002d0fa78 EFLAGS: 00000206 RAX: be2bc88515d4c100 RBX: ffff88802cb98000 RCX: be2bc88515d4c100 RDX: 0000000000000000 RSI: ffffffff8a2b3aa0 RDI: ffffffff8a79fe40 RBP: 0000000000000000 R08: ffffffff8198e6f9 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1005973006 R12: dffffc0000000000 R13: 0000000000000246 R14: ffffffff8c31eb80 R15: 00000000ffffffff lock_is_held include/linux/lockdep.h:287 [inline] ___might_sleep+0x9b/0x610 kernel/sched/core.c:9624 __mutex_lock_common+0xc8/0x2400 kernel/locking/mutex.c:573 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 __do_sys_perf_event_open kernel/events/core.c:12805 [inline] __se_sys_perf_event_open+0x18d9/0x1bb0 kernel/events/core.c:12387 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: 0033:0x7f24dbbcd819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f24d9e27028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f24dbe46fa0 RCX: 00007f24dbbcd819 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480 RBP: 00007f24dbc63c91 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f24dbe47038 R14: 00007f24dbe46fa0 R15: 00007fff3a660ba8