rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2630 jiffies s: 21413 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: 14266 Comm: syz.2.4425 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__this_cpu_preempt_check+0x0/0x10 lib/smp_processor_id.c:65
Code: 48 89 da e8 62 dd f4 ff 48 8b 74 24 30 48 c7 c7 60 fd de 8a e8 51 dd f4 ff e8 ba 8b ff ff eb a8 e8 35 ea ff ff 0f 1f 44 00 00 <48> 89 fe 48 c7 c7 e0 fc de 8a e9 e1 fe ff ff 00 eb 1e 0f 1f 00 48
RSP: 0018:ffffc900000079d8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc900000079f8 RCX: 2ca8858766eac500
RDX: 0000000000000000 RSI: ffffffff8adefcc0 RDI: ffffffff8a865740
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1c3eee6
R10: fffffbfff1c3eee6 R11: 1ffffffff1c3eee5 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fb52fe9d6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31663fff CR3: 000000007a8b6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 kvm_set_cpu_l1tf_flush_l1d arch/x86/include/asm/hardirq.h:71 [inline]
 sysvec_irq_work+0x18/0xc0 arch/x86/kernel/irq_work.c:17
 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: 2ca8858766eac500 RBX: 1ffff92000000f5c RCX: 2ca8858766eac500
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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:rcu_preempt_deferred_qs_irqrestore+0x853/0xc00 kernel/rcu/tree_plugin.h:575
Code: 24 20 e8 b0 95 b5 08 8b 44 24 34 44 08 e0 a8 01 75 18 4c 89 f7 e8 3d 93 b5 08 4c 89 f7 be 01 00 00 00 48 89 c2 e8 2d df 00 00 <48> c7 84 24 a0 00 00 00 0e 36 e0 45 48 8b 84 24 98 00 00 00 4a c7
RSP: 0018:ffffc900036b7700 EFLAGS: 00000206
RAX: 2ca8858766eac500 RBX: ffffffff8cb30140 RCX: 2ca8858766eac500
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffffffff8adefce0
RBP: ffffc900036b7850 R08: dffffc0000000000 R09: ffffed10171c6afa
R10: ffffed10171c6afa R11: 1ffff110171c6af9 R12: ffff888029853b80
R13: 0000000000000000 R14: ffff8880b8e3b9a0 R15: dffffc0000000000
 rcu_read_unlock_special+0x419/0x500 kernel/rcu/tree_plugin.h:684
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 page_ext_put+0x91/0xb0 mm/page_ext.c:182
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare mm/page_alloc.c:1509 [inline]
 free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384
 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3479
 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]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x123/0x2f0 mm/slub.c:3383
 kmem_cache_zalloc include/linux/slab.h:689 [inline]
 lsm_file_alloc security/security.c:575 [inline]
 security_file_alloc+0x30/0x110 security/security.c:1543
 __alloc_file+0xc2/0x230 fs/file_table.c:143
 alloc_empty_file+0x90/0x180 fs/file_table.c:187
 alloc_file+0x5c/0x5f0 fs/file_table.c:229
 alloc_file_pseudo+0x17a/0x1f0 fs/file_table.c:272
 __anon_inode_getfile fs/anon_inodes.c:122 [inline]
 anon_inode_getfile+0xc1/0x1a0 fs/anon_inodes.c:160
 __do_sys_perf_event_open kernel/events/core.c:12604 [inline]
 __se_sys_perf_event_open+0xbf0/0x1e60 kernel/events/core.c:12378
 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: 0033:0x7fb52ef8eec9
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:00007fb52fe9d038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fb52f1e5fa0 RCX: 00007fb52ef8eec9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000700
RBP: 00007fb52f011f91 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb52f1e6038 R14: 00007fb52f1e5fa0 R15: 00007fff5c651b58
 </TASK>