rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2657 jiffies s: 2653005 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 20752 Comm: syz.8.4771 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:perf_prepare_sample+0x161d/0x2040 kernel/events/core.c:7684 Code: 4c 89 f7 e8 85 cd 2d 00 49 89 1e 4c 8b 74 24 10 4c 89 f6 48 81 e6 00 00 10 00 31 ff e8 6c b4 dd ff 49 81 e6 00 00 10 00 75 0a 7e b0 dd ff e9 01 03 00 00 48 8b 44 24 30 42 0f b6 04 38 84 c0 RSP: 0018:ffffc90000007500 EFLAGS: 00000046 RAX: ffffffff81a31f94 RBX: 0000000000000000 RCX: ffff88802b915940 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900000075f0 R08: dffffc0000000000 R09: ffffc90000007640 R10: fffff52000000ecf R11: 1ffff92000000ec8 R12: dffffc0000000000 R13: ffff88807a730c00 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007febcf5346c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e31aff8 CR3: 00000000377b4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __perf_event_output kernel/events/core.c:7730 [inline] perf_event_output_forward+0x163/0x2a0 kernel/events/core.c:7750 __perf_event_overflow+0x448/0x610 kernel/events/core.c:9496 perf_tp_event+0x335/0xb60 kernel/events/core.c:10029 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002 perf_trace_preemptirq_template+0x287/0x330 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728 RIP: 0010:rcu_read_unlock_special+0x84/0x500 kernel/rcu/tree_plugin.h:685 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 5d 97 96 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc90000007c20 EFLAGS: 00000206 RAX: 69610e85cf47e200 RBX: 1ffff92000000f8c RCX: 69610e85cf47e200 RDX: dffffc0000000000 RSI: ffffffff8a8c0300 RDI: ffffffff8adefae0 RBP: ffffc90000007d08 R08: dffffc0000000000 R09: ffffed10171c6af6 R10: ffffed10171c6af6 R11: 1ffff110171c6af5 R12: 0000000000000246 R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:823 [inline] rebalance_domains+0x89c/0x9d0 kernel/sched/fair.c:11044 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:__preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline] RIP: 0010:rcu_is_watching+0x5c/0xa0 kernel/rcu/tree.c:722 Code: 80 3c 38 00 74 08 4c 89 f7 e8 30 de 65 00 48 c7 c3 a8 57 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 2f 8b 03 <65> ff 0d d5 60 97 7e 74 0c 83 e0 04 c1 e8 02 5b 41 5e 41 5f c3 e8 RSP: 0018:ffffc9000400ead8 EFLAGS: 00000246 RAX: 0000000000097e7c RBX: ffff8880b8e357a8 RCX: 69610e85cf47e200 RDX: 0000000000000002 RSI: ffffffff8adefac0 RDI: ffffffff8adefa80 RBP: 0000000000000001 R08: 0000000000000004 R09: 000000000000000c R10: fffff52000801d75 R11: 1ffff92000801d73 R12: ffff88802b915940 R13: 0000000000001000 R14: ffffffff8c5e3980 R15: dffffc0000000000 kernel_text_address+0x77/0xd0 kernel/extable.c:113 __kernel_text_address+0x9/0x30 kernel/extable.c:79 unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323 arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:383 kmalloc_node include/linux/slab.h:585 [inline] kzalloc_node include/linux/slab.h:710 [inline] __get_vm_area_node+0x122/0x330 mm/vmalloc.c:2506 __vmalloc_node_range+0x357/0x1390 mm/vmalloc.c:3203 __vmalloc_node mm/vmalloc.c:3308 [inline] vmalloc+0x75/0x80 mm/vmalloc.c:3341 bpf_prog_calc_tag+0xbb/0x630 kernel/bpf/core.c:287 resolve_pseudo_ldimm64+0xd4/0x1030 kernel/bpf/verifier.c:13024 bpf_check+0x3d97/0x10ca0 kernel/bpf/verifier.c:15558 bpf_prog_load+0x1072/0x15a0 kernel/bpf/syscall.c:2641 __sys_bpf+0x520/0x6d0 kernel/bpf/syscall.c:5020 __do_sys_bpf kernel/bpf/syscall.c:5124 [inline] __se_sys_bpf kernel/bpf/syscall.c:5122 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5122 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7febce78ebe9 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:00007febcf534038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007febce9c6090 RCX: 00007febce78ebe9 RDX: 0000000000000094 RSI: 00002000000000c0 RDI: 0000000000000005 RBP: 00007febce811e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007febce9c6128 R14: 00007febce9c6090 R15: 00007ffd7d02c2b8