rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2676 jiffies s: 18825 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: 9112 Comm: syz.3.1650 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:check_region_inline mm/kasan/generic.c:169 [inline] RIP: 0010:kasan_check_range+0xf/0x290 mm/kasan/generic.c:189 Code: 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 00 00 cc cc 00 00 cc cc 00 00 cc cc b0 01 48 85 f6 0f 84 a4 01 00 00 41 57 41 56 <53> 49 89 f8 49 01 f0 0f 82 57 02 00 00 49 89 f8 49 c1 e8 2f 41 81 RSP: 0018:ffffc90000007208 EFLAGS: 00000002 RAX: dffffc0000000001 RBX: ffff8880b8e340b8 RCX: ffffffff84060684 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90000007260 RBP: ffffc900000072c8 R08: dffffc0000000000 R09: ffffed10171c6818 R10: ffffed10171c6818 R11: 1ffff110171c6817 R12: 1ffff92000000e48 R13: 0000000000000000 R14: 1ffff110171c7736 R15: ffff8880b8e3b9b0 FS: 00007fb1742136c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe3a5a4f721 CR3: 000000007c99e000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 00002000000000c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: instrument_atomic_write include/linux/instrumented.h:87 [inline] llist_add_batch+0xd4/0x170 lib/llist.c:33 llist_add include/linux/llist.h:221 [inline] __irq_work_queue_local+0xad/0x190 kernel/irq_work.c:97 irq_work_queue_on+0x13c/0x260 kernel/irq_work.c:165 rcu_read_unlock_special+0x3c7/0x500 kernel/rcu/tree_plugin.h:678 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:823 [inline] __perf_event_output kernel/events/core.c:7741 [inline] perf_event_output_forward+0x237/0x2a0 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 2d 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:ffffc90000007aa0 EFLAGS: 00000206 RAX: 4098f7c251ddc800 RBX: 1ffff92000000f5c RCX: 4098f7c251ddc800 RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffffffff8adefce0 RBP: ffffc90000007b90 R08: dffffc0000000000 R09: ffffed10171c6afa R10: ffffed10171c6afa R11: 1ffff110171c6af9 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] 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+0x554/0xd60 kernel/time/hrtimer.c:1811 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828 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:put_cpu_partial+0x1b0/0x250 mm/slub.c:2666 Code: 3b 44 24 18 0f 85 b4 00 00 00 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 3c ec 46 08 f7 c5 00 02 00 00 74 c0 fb 4d 85 e4 <75> bf eb c8 e8 d7 66 33 02 85 c0 0f 84 e9 fe ff ff 83 3d d0 34 4f RSP: 0018:ffffc900038e7990 EFLAGS: 00000246 RAX: 4098f7c251ddc800 RBX: ffff888017442140 RCX: 4098f7c251ddc800 RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffffffff8adefce0 RBP: 0000000000000286 R08: dffffc0000000000 R09: ffffed10171c6afa R10: ffffed10171c6afa R11: 1ffff110171c6af9 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88807c5b0000 R15: ffff8880b8e3e840 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1e/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737 slab_alloc_node mm/slub.c:3359 [inline] __kmem_cache_alloc_node+0x140/0x260 mm/slub.c:3398 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc+0xa0/0x240 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] kzalloc include/linux/slab.h:699 [inline] bpf_test_init+0xc0/0x150 net/bpf/test_run.c:775 bpf_prog_test_run_xdp+0x359/0xe50 net/bpf/test_run.c:1333 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3692 __sys_bpf+0x593/0x6d0 kernel/bpf/syscall.c:5045 __do_sys_bpf kernel/bpf/syscall.c:5131 [inline] __se_sys_bpf kernel/bpf/syscall.c:5129 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5129 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: 0033:0x7fb17338eec9 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:00007fb174213038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb1735e5fa0 RCX: 00007fb17338eec9 RDX: 0000000000000050 RSI: 0000200000000600 RDI: 000000000000000a RBP: 00007fb173411f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb1735e6038 R14: 00007fb1735e5fa0 R15: 00007ffd9e58d988