rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-....: (3 ticks this GP) idle=0d1c/1/0x4000000000000000 softirq=12513/12514 fqs=5248 rcu: hardirqs softirqs csw/system rcu: number: 11283008 0 0 rcu: cputime: 5798 46729 0 ==> 52510(ms) rcu: (detected by 0, t=10502 jiffies, g=11081, q=747 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 6050 Comm: syz.3.52 Not tainted 6.6.102-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:native_apic_msr_eoi+0xf/0x10 arch/x86/include/asm/apic.h:202 Code: c3 89 c6 89 da 48 c7 c7 a0 89 b9 8c 89 c5 e8 a8 c2 17 03 89 e8 eb e3 0f 1f 40 00 f3 0f 1e fa b9 0b 08 00 00 31 c0 31 d2 0f 30 f3 0f 1e fa 81 ff cf 00 00 00 7f 0c 83 ff 20 74 2a 83 ff 30 74 RSP: 0018:ffffc900001f0a20 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffc900001f0a58 RCX: 000000000000080b RDX: 0000000000000000 RSI: ffffffff8afc66a0 RDI: ffffffff8afc6660 RBP: 0000000000000000 R08: ffffffff8e4a882f R09: 1ffffffff1c95105 R10: dffffc0000000000 R11: fffffbfff1c95106 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f989c4dd6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ec1eff8 CR3: 00000000770c7000 CR4: 00000000003506e0 Call Trace: apic_eoi arch/x86/include/asm/apic.h:409 [inline] __sysvec_irq_work+0x11/0x380 arch/x86/kernel/irq_work.c:19 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0x4e/0xc0 arch/x86/kernel/irq_work.c:17 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:ffffc900001f0b00 EFLAGS: 00000206 RAX: 44ae16595bc4ba00 RBX: 1ffff9200003e168 RCX: 44ae16595bc4ba00 RDX: dffffc0000000000 RSI: ffffffff8aaab9c0 RDI: ffffffff8afc66c0 RBP: ffffc900001f0bf0 R08: ffffffff8e4a882f R09: 1ffffffff1c95105 R10: dffffc0000000000 R11: fffffbfff1c95106 R12: ffffffff8cd35400 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002 __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:__sanitizer_cov_trace_const_cmp8+0x0/0x80 kernel/kcov.c:321 Code: c0 4c 89 01 48 c7 44 11 08 05 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f 1e fa 48 8b 04 24 65 48 8b 0d 90 2a 7e 7e 65 8b 15 91 2a 7e RSP: 0018:ffffc900050b7780 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc900050b7840 RCX: 0000000000080000 RDX: ffffc9000d12b000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900050b7810 R08: ffffffff8e4a882f R09: 1ffffffff1c95105 R10: dffffc0000000000 R11: fffffbfff1c95106 R12: 0000000000000000 R13: ffffffff8c7d2508 R14: ffffffff817466a0 R15: ffffc900050b7788 arch_stack_walk+0x12a/0x190 arch/x86/kernel/stacktrace.c:27 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 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:721 [inline] bpf_prog_alloc_no_stats+0xd8/0x440 kernel/bpf/core.c:102 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: 0033:0x7f989b58ebe9 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:00007f989c4dd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f989b7b5fa0 RCX: 00007f989b58ebe9 RDX: 0000000000000094 RSI: 00002000000006c0 RDI: 0000000000000005 RBP: 00007f989b611e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f989b7b6038 R14: 00007f989b7b5fa0 R15: 00007fffd0d2cd68