rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=3b1/1/0x4000000000000002 softirq=27303/27304 fqs=2099 (detected by 1, t=10502 jiffies, g=26297, q=3058) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 12293 Comm: syz.1.3848 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:debug_lockdep_rcu_enabled+0x9/0x30 kernel/rcu/update.c:280 Code: 80 1a 0b 8a 48 c7 c6 00 3f 0b 8a e8 01 3b f5 ff 0f 0b eb d1 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 31 c0 83 3d bb 49 c7 03 00 <74> 1d 83 3d 32 7c c7 03 00 74 14 65 48 8b 0d a4 82 60 76 31 c0 83 RSP: 0000:ffffc9000340f340 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffff8880b9035120 RCX: ffff88805a8d0000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880b9035120 RBP: ffffc9000340f470 R08: ffffffff8eebf008 R09: ffffffff8eebf018 R10: ffffffff8eebf010 R11: ffffffff8eebf003 R12: dffffc0000000000 R13: ffffc9000340f526 R14: ffffffff8bf23a40 R15: ffffc9000340f680 FS: 0000555591694500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b34863fff CR3: 0000000022f21000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_get_guest_cbs include/linux/perf_event.h:1274 [inline] perf_instruction_pointer+0x46/0x3f0 arch/x86/events/core.c:2951 perf_prepare_sample+0x188/0x1cb0 kernel/events/core.c:7627 __perf_event_output kernel/events/core.c:7802 [inline] perf_event_output_forward+0x146/0x280 kernel/events/core.c:7822 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515 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: 0000:ffffc9000340fac0 EFLAGS: 00000206 RAX: 9c134ec3cc88ff00 RBX: 1ffff92000681f5c RCX: 9c134ec3cc88ff00 RDX: dffffc0000000000 RSI: ffffffff8a0b1be0 RDI: ffffffff8a59e800 RBP: ffffc9000340fb98 R08: dffffc0000000000 R09: fffffbfff1ff5419 R10: fffffbfff1ff5419 R11: 1ffffffff1ff5418 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] __unlock_page_memcg+0xea/0x100 mm/memcontrol.c:2093 do_set_pte+0x3c9/0x530 mm/memory.c:4069 finish_fault+0x52e/0x8d0 mm/memory.c:4143 do_shared_fault mm/memory.c:4336 [inline] do_fault mm/memory.c:4396 [inline] handle_pte_fault mm/memory.c:4650 [inline] __handle_mm_fault mm/memory.c:4785 [inline] handle_mm_fault+0x2154/0x43b0 mm/memory.c:4883 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357 handle_page_fault arch/x86/mm/fault.c:1445 [inline] exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0033:0x7f37316cb411 Code: b5 7a ff ff 48 8b 05 66 43 eb 00 0f b6 4c 24 10 be 08 00 00 00 48 89 df 83 05 42 43 eb 00 01 48 8d 50 ff 48 89 15 47 43 eb 00 <88> 48 ff 8b 2d 2e 43 eb 00 e8 81 7a ff ff 48 8b 05 3a 43 eb 00 41 RSP: 002b:00007ffcf38a9d70 EFLAGS: 00010202 RAX: 0000001b34864000 RBX: 00007f373257f720 RCX: 0000000000000003 RDX: 0000001b34863fff RSI: 0000000000000008 RDI: 00007f373257f720 RBP: 00007f3731a50038 R08: 0000000000000000 R09: 0000000000000000 R10: 00007f373257f700 R11: 0000000000000000 R12: 00000000fffffc03 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000