rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2672 jiffies s: 114809 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: 25061 Comm: syz.4.5071 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:preempt_count_add+0x13c/0x190 kernel/sched/core.c:5715
Code: 48 c7 c1 40 a1 c1 96 80 e1 07 80 c1 03 38 c1 0f 8c 00 ff ff ff 89 fb 48 c7 c7 40 a1 c1 96 e8 3b ad 7a 00 89 df e9 eb fe ff ff <48> c7 c1 40 a1 c1 96 80 e1 07 80 c1 03 38 c1 0f 8c 05 ff ff ff 89
RSP: 0018:ffffc900001e09e8 EFLAGS: 00000002
RAX: 0000000000000004 RBX: ffffc900001e0a38 RCX: ffffffff96c1a103
RDX: 0000000000000000 RSI: ffffffff8a8660e0 RDI: 0000000000010000
RBP: 0000000000000000 R08: ffffffff8e21116f R09: 1ffffffff1c4222d
R10: dffffc0000000000 R11: fffffbfff1c4222e R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: dffffc0000000000
FS:  00007f3fa449c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055aba2ba2a20 CR3: 00000000891ba000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 irq_enter_rcu+0x17/0xe0 kernel/softirq.c:638
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x45/0xc0 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+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 12 7c 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:ffffc900001e0ae0 EFLAGS: 00000206
RAX: af0eba365276ce00 RBX: 1ffff9200003c164 RCX: af0eba365276ce00
RDX: dffffc0000000000 RSI: ffffffff8a8c1820 RDI: ffffffff8adf6220
RBP: ffffc900001e0bd0 R08: ffff8880b8f357cb R09: 1ffff110171e6af9
R10: dffffc0000000000 R11: ffffed10171e6afa R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3bb00 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:1751 [inline]
 __hrtimer_run_queues+0x522/0xc90 kernel/time/hrtimer.c:1815
 hrtimer_run_softirq+0x173/0x290 kernel/time/hrtimer.c:1832
 handle_softirqs+0x291/0x910 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:56 [inline]
RIP: 0010:__unwind_start+0x4a4/0x650 arch/x86/kernel/unwind_orc.c:715
Code: 41 80 3c 04 00 48 8d 6b 08 74 0b 48 89 ef e8 13 4a 9a 00 4c 89 f9 48 8b 6d 00 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 <74> 0b 4c 89 ff e8 f2 49 9a 00 4c 89 f9 48 8b 01 48 8b 54 24 08 48
RSP: 0018:ffffc90005967718 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc90005967768 RCX: ffffc90005967778
RDX: ffffc90005967701 RSI: dffffc0000000000 RDI: 00000000ffffffff
RBP: ffffc90005960000 R08: ffffc90005967758 R09: ffffc900059677b8
R10: dffffc0000000000 R11: fffff52000b2cef9 R12: 1ffff92000b2ceee
R13: 1ffff92000b2ceef R14: 1ffff92000b2ceed R15: ffffc90005967778
 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_slab_alloc+0x6b/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x4b/0x490 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+0x18b/0x2f0 mm/slub.c:3383
 kmem_cache_zalloc include/linux/slab.h:689 [inline]
 __alloc_file+0x25/0x230 fs/file_table.c:138
 alloc_empty_file+0x90/0x180 fs/file_table.c:187
 alloc_file+0x5b/0x5f0 fs/file_table.c:229
 alloc_file_pseudo+0x180/0x200 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:12654 [inline]
 __se_sys_perf_event_open+0xc2a/0x1ec0 kernel/events/core.c:12428
 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: 0033:0x7f3fa359e159
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:00007f3fa449c028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f3fa3825fa0 RCX: 00007f3fa359e159
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f3fa3635024 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3fa3826038 R14: 00007f3fa3825fa0 R15: 00007ffe3b7360f8
 </TASK>