rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=17d/1/0x4000000000000002 softirq=13013/13014 fqs=2097 (detected by 1, t=10505 jiffies, g=17317, q=208) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 6055 Comm: syz.2.506 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:perf_tp_event+0x353/0xb50 kernel/events/core.c:10045 Code: 08 00 00 49 83 c5 60 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ef e8 a1 4f 25 00 4d 8b 6d 00 <4d> 85 ed 0f 84 06 01 00 00 49 83 c5 a0 0f 84 fc 00 00 00 e8 75 e7 RSP: 0018:ffffc90000007600 EFLAGS: 00000046 RAX: 1ffff110056b400c RBX: 1ffff11017206a4a RCX: dffffc0000000000 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc90000007888 R08: dffffc0000000000 R09: fffffbfff1ad32b6 R10: fffffbfff1ad32b6 R11: 1ffffffff1ad32b5 R12: ffff8880b9035250 R13: ffff8880233db618 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fc3912f76c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4270a9ed58 CR3: 0000000060309000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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 ad 13 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:ffffc90000007ae0 EFLAGS: 00000206 RAX: 669d703b773f6900 RBX: 1ffff92000000f60 RCX: 669d703b773f6900 RDX: dffffc0000000000 RSI: ffffffff8a0b1820 RDI: ffffffff8a59a4c0 RBP: ffffc90000007bb8 R08: dffffc0000000000 R09: ffffed1017207662 R10: ffffed1017207662 R11: 1ffff11017207661 R12: ffffffff8c120b00 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:771 [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 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x12f/0x220 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:unwind_next_frame+0x3f5/0x1d90 arch/x86/kernel/unwind_orc.c:461 Code: b6 04 2c 84 c0 48 89 14 24 0f 85 af 13 00 00 4c 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 bf 13 00 00 41 0f b7 06 41 89 c7 <41> 83 e7 0f 66 41 83 ff 09 0f 87 d4 08 00 00 4c 89 74 24 10 42 ff RSP: 0018:ffffc90002ffea68 EFLAGS: 00000246 RAX: 0000000000000015 RBX: ffffc90002ffeb28 RCX: ffffffff8d7f4500 RDX: ffffffff8dee9edc RSI: ffffffff8dee9ea6 RDI: ffffffff8134790c RBP: ffffffff81c27b70 R08: 000000000000000a R09: 0000000000000000 R10: fffff520005ffd71 R11: 1ffff920005ffd6f R12: 1ffffffff1bdd3dc R13: dffffc0000000000 R14: ffffffff8dee9ee0 R15: 0000000000000015 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122 save_stack+0xf3/0x1e0 mm/page_owner.c:119 __reset_page_owner+0x51/0x180 mm/page_owner.c:140 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x94/0x280 mm/page_alloc.c:3396 free_slab mm/slub.c:2020 [inline] discard_slab mm/slub.c:2026 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2512 put_cpu_partial+0x12d/0x190 mm/slub.c:2592 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 ____kasan_kmalloc mm/kasan/common.c:479 [inline] __kasan_krealloc+0xa7/0x1b0 mm/kasan/common.c:581 kasan_krealloc include/linux/kasan.h:284 [inline] __do_krealloc mm/slab_common.c:1240 [inline] krealloc+0xb1/0xf0 mm/slab_common.c:1277 push_jmp_history kernel/bpf/verifier.c:2125 [inline] is_state_visited kernel/bpf/verifier.c:11082 [inline] do_check+0x2d3d/0xeac0 kernel/bpf/verifier.c:11222 do_check_common+0xe67/0x16c0 kernel/bpf/verifier.c:13506 do_check_main kernel/bpf/verifier.c:13569 [inline] bpf_check+0x31f3/0xf090 kernel/bpf/verifier.c:14140 bpf_prog_load+0x1043/0x1550 kernel/bpf/syscall.c:2354 __sys_bpf+0x4c2/0x670 kernel/bpf/syscall.c:4657 __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: 0033:0x7fc3930b0ec9 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:00007fc3912f7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fc393308090 RCX: 00007fc3930b0ec9 RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005 RBP: 00007fc393133f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc393308128 R14: 00007fc393308090 R15: 00007ffec048f598