rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2654 jiffies s: 2585 root: 0x2/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4573 Comm: syz.2.61 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:bpf_prog_run_array include/linux/bpf.h:1658 [inline] RIP: 0010:trace_call_bpf+0x1d9/0x6b0 kernel/trace/bpf_trace.c:135 Code: 00 00 e8 ba 54 f6 ff eb 05 e8 b3 54 f6 ff 48 b8 00 00 00 00 00 fc ff df 41 c6 44 05 04 00 48 c7 84 24 80 00 00 00 00 00 00 00 42 ed a0 08 89 c3 31 ff 89 c6 e8 e7 57 f6 ff 85 db 74 1f e8 de RSP: 0018:ffffc900001e07a0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffff88802cd29dc0 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900001e0898 R08: dffffc0000000000 R09: 1ffffffff215ec48 R10: dffffc0000000000 R11: fffffbfff215ec49 R12: ffffffff8cb7fca0 R13: 1ffff9200003c100 R14: ffff888074b42100 R15: 0000000000000000 FS: 00007f7c0ffd46c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f916ff8 CR3: 00000000571fc000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:9997 perf_trace_preemptirq_template+0x268/0x320 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+0x7f/0x510 kernel/rcu/tree_plugin.h:685 Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 e2 33 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 RSP: 0018:ffffc900001e0ac0 EFLAGS: 00000206 RAX: 3a81f972b5397a00 RBX: 1ffff9200003c160 RCX: 3a81f972b5397a00 RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0f60 RBP: ffffc900001e0bb0 R08: ffff8880b8f3580b R09: 1ffff110171e6b01 R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000246 R13: dffffc0000000000 R14: ffff8880b8f3b900 R15: 0000000000000002 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:823 [inline] ieee80211_iterate_active_interfaces_atomic+0x156/0x170 net/mac80211/util.c:826 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147 __run_hrtimer kernel/time/hrtimer.c:1747 [inline] __hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1811 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 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_schedule_irq+0xb6/0x160 kernel/sched/core.c:6874 Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 7f bf 01 00 00 00 e8 f5 42 23 f7 e8 b0 35 53 f7 fb bf 01 00 00 00 75 b9 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f RSP: 0018:ffffc900055aeb20 EFLAGS: 00000282 RAX: 3a81f972b5397a00 RBX: 0000000000000000 RCX: 3a81f972b5397a00 RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: 0000000000000001 RBP: ffffc900055aebd0 R08: ffff8880b8f3580b R09: 1ffff110171e6b01 R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000ab5d64 irqentry_exit+0x63/0x70 kernel/entry/common.c:439 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:unwind_next_frame+0x1/0x20b0 arch/x86/kernel/unwind_orc.c:423 Code: 31 c0 5b 41 5e 41 5f c3 89 d9 80 e1 07 80 c1 03 38 c1 7c 97 48 89 df e8 cd 44 9a 00 eb 8d 66 2e 0f 1f 84 00 00 00 00 00 90 55 <41> 57 41 56 41 55 41 54 53 48 81 ec a0 00 00 00 48 89 fb 49 be 00 RSP: 0018:ffffc900055aec98 EFLAGS: 00000287 RAX: ffffc900055aed90 RBX: ffffc900055aed08 RCX: 0000000000000001 RDX: ffffc900055aed98 RSI: dffffc0000000000 RDI: ffffc900055aed08 RBP: 1ffff92000ab5da2 R08: ffffc900055aed01 R09: ffffc900055aed08 R10: dffffc0000000000 R11: fffff52000ab5dad R12: ffffc900055aed40 R13: ffffc900055aed18 R14: 1ffff92000ab5da3 R15: ffffc900055aed10 __unwind_start+0x5bb/0x740 arch/x86/kernel/unwind_orc.c:717 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xda/0x140 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:53 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_krealloc+0xfd/0x190 mm/kasan/common.c:443 kasan_krealloc include/linux/kasan.h:231 [inline] __do_krealloc mm/slab_common.c:1332 [inline] krealloc+0xc1/0x100 mm/slab_common.c:1369 copy_array kernel/bpf/verifier.c:955 [inline] copy_verifier_state+0xe6/0xb10 kernel/bpf/verifier.c:1139 pop_stack kernel/bpf/verifier.c:1201 [inline] do_check kernel/bpf/verifier.c:12718 [inline] do_check_common+0x8ae1/0xc6d0 kernel/bpf/verifier.c:14933 do_check_main kernel/bpf/verifier.c:14996 [inline] bpf_check+0xb08f/0x10db0 kernel/bpf/verifier.c:15573 bpf_prog_load+0x101a/0x1560 kernel/bpf/syscall.c:2651 __sys_bpf+0x5b8/0x780 kernel/bpf/syscall.c:5030 __do_sys_bpf kernel/bpf/syscall.c:5134 [inline] __se_sys_bpf kernel/bpf/syscall.c:5132 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5132 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f7c0f19c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7c0ffd4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f7c0f415fa0 RCX: 00007f7c0f19c799 RDX: 0000000000000094 RSI: 0000200000000200 RDI: 0000000000000005 RBP: 00007f7c0f232bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7c0f416038 R14: 00007f7c0f415fa0 R15: 00007ffe5b534eb8