rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=5cf4/1/0x4000000000000000 softirq=12991/12992 fqs=5244 rcu: hardirqs softirqs csw/system rcu: number: 10780735 0 0 rcu: cputime: 5641 46885 0 ==> 52510(ms) rcu: (detected by 1, t=10502 jiffies, g=12161, q=1842 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 6155 Comm: syz.2.83 Not tainted 6.6.102-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:__lock_acquire+0x202/0x7c80 kernel/locking/lockdep.c:5041 Code: 83 15 00 75 0b 83 7c 24 60 30 0f 83 76 5b 00 00 48 89 5c 24 40 8b 5d 30 44 8b 7d 20 48 c7 c0 c0 b3 70 90 49 29 c5 49 c1 fd 04 <48> b9 c5 4e ec c4 4e ec c4 4e 49 0f af cd 41 89 cd 85 db 0f 85 2c RSP: 0018:ffffc90000006ea0 EFLAGS: 00000002 RAX: ffffffff9070b3c0 RBX: 0000000000000000 RCX: ffffffff96eaa403 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8cd2fca0 RBP: ffffc900000070e8 R08: dffffc0000000000 R09: 0000000000000001 R10: dffffc0000000000 R11: fffffbfff1c95106 R12: 0000000000000000 R13: 0000000000000138 R14: ffffffff8cd2fca8 R15: 0000000000000000 FS: 00007f4ccbca36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f20983f9fe8 CR3: 00000000302c0000 CR4: 00000000003506f0 Call Trace: lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 rcu_lock_acquire include/linux/rcupdate.h:334 [inline] rcu_read_lock_sched include/linux/rcupdate.h:878 [inline] pfn_valid include/linux/mmzone.h:2011 [inline] __virt_addr_valid+0x1a9/0x540 arch/x86/mm/physaddr.c:65 kasan_addr_to_slab+0xd/0xd0 mm/kasan/common.c:35 __kasan_record_aux_stack+0xf/0xc0 mm/kasan/generic.c:477 irq_work_queue_on+0xf5/0x220 kernel/irq_work.c:150 rcu_read_unlock_special+0x3a7/0x4c0 kernel/rcu/tree_plugin.h:675 __rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:818 [inline] __perf_event_output kernel/events/core.c:7983 [inline] perf_event_output_forward+0x2e6/0x3a0 kernel/events/core.c:7992 __perf_event_overflow+0x447/0x630 kernel/events/core.c:9717 perf_swevent_overflow kernel/events/core.c:9793 [inline] perf_swevent_event+0x2f5/0x5c0 kernel/events/core.c:-1 perf_tp_event+0x4f9/0x13a0 kernel/events/core.c:10343 perf_trace_run_bpf_submit+0xf4/0x1c0 kernel/events/core.c:10267 perf_trace_preemptirq_template+0x281/0x340 include/trace/events/preemptirq.h:14 trace_irq_enable+0xbf/0xe0 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:56 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:723 RIP: 0010:rcu_read_unlock_special+0x88/0x4c0 kernel/rcu/tree_plugin.h:682 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 39 58 93 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:ffffc90000007b00 EFLAGS: 00000206 RAX: b3014c61dc4e7e00 RBX: 1ffff92000000f68 RCX: b3014c61dc4e7e00 RDX: dffffc0000000000 RSI: ffffffff8aaab9c0 RDI: ffffffff8afc66c0 RBP: ffffc90000007bf0 R08: ffffffff8e4a882f R09: 1ffffffff1c95105 R10: dffffc0000000000 R11: fffffbfff1c95106 R12: ffffffff8cd35400 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:818 [inline] ieee80211_iterate_active_interfaces_atomic+0x15a/0x180 net/mac80211/util.c:804 mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295 __run_hrtimer kernel/time/hrtimer.c:1755 [inline] __hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1819 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1836 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:unwind_next_frame+0x1db/0x2970 arch/x86/kernel/unwind_orc.c:-1 Code: c7 c3 00 00 00 81 4c 89 ff 48 c7 c6 00 00 00 81 e8 aa e8 4a 00 49 81 ff 00 00 00 81 40 0f 92 c5 4c 89 ff 48 c7 c6 00 00 a0 8a 90 e8 4a 00 49 81 ff 00 00 a0 8a 0f 93 c0 40 08 e8 4c 89 7c 24 RSP: 0018:ffffc9000c277458 EFLAGS: 00000206 RAX: ffffffff813aa486 RBX: ffffffff81000000 RCX: ffff8880237a5a00 RDX: 0000000000000002 RSI: ffffffff8aa00000 RDI: ffffffff81cf6a59 RBP: ffffc9000c277500 R08: ffffc9000c2775f0 R09: 0000000000000003 R10: 0000000000000004 R11: 0000000000000002 R12: ffffc9000c277528 R13: dffffc0000000000 R14: ffffc9000c27755d R15: ffffffff81cf6a59 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc_node+0xb4/0x230 mm/slab_common.c:1014 kmalloc_node include/linux/slab.h:620 [inline] __vmalloc_area_node mm/vmalloc.c:3144 [inline] __vmalloc_node_range+0x59a/0x1320 mm/vmalloc.c:3339 __vmalloc_node mm/vmalloc.c:3404 [inline] __vmalloc+0x7a/0x90 mm/vmalloc.c:3418 bpf_prog_alloc_no_stats+0x47/0x440 kernel/bpf/core.c:98 bpf_prog_alloc+0x3d/0x1b0 kernel/bpf/core.c:136 bpf_prog_load+0x6b8/0x16d0 kernel/bpf/syscall.c:2675 __sys_bpf+0x55a/0x800 kernel/bpf/syscall.c:5467 __do_sys_bpf kernel/bpf/syscall.c:5571 [inline] __se_sys_bpf kernel/bpf/syscall.c:5569 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5569 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f4ccad8ebe9 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:00007f4ccbca3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f4ccafb5fa0 RCX: 00007f4ccad8ebe9 RDX: 0000000000000090 RSI: 0000200000000240 RDI: 0000000000000005 RBP: 00007f4ccae11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4ccafb6038 R14: 00007f4ccafb5fa0 R15: 00007ffdf94979a8