rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2667 jiffies s: 977 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: 4378 Comm: syz.0.7 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:perf_fetch_caller_regs include/linux/perf_event.h:1247 [inline]
RIP: 0010:perf_trace_preemptirq_template+0x168/0x320 include/trace/events/preemptirq.h:14
Code: e8 3d b1 01 00 48 85 c0 0f 84 20 01 00 00 49 89 c5 4c 89 64 24 08 4c 8b 64 24 40 4c 8b 75 08 49 8d bc 24 80 00 00 00 48 89 f8 <48> c1 e8 03 80 3c 18 00 74 05 e8 c9 85 4a 00 4d 89 b4 24 80 00 00
RSP: 0018:ffffc90000007900 EFLAGS: 00000082
RAX: ffff8880b8e355d8 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8880b8e355d8
RBP: ffffc900000079c8 R08: ffff8880b8e3580b R09: 1ffff110171c6b01
R10: dffffc0000000000 R11: ffffed10171c6b02 R12: ffff8880b8e35558
R13: ffffe8ffffc86198 R14: ffffffff8188dcc3 R15: 1ffff92000000f24
FS:  00007f3910bc86c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f817ff8 CR3: 0000000024120000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 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:ffffc90000007ac0 EFLAGS: 00000206
RAX: 0b599256b2567500 RBX: 1ffff92000000f60 RCX: 0b599256b2567500
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0f60
RBP: ffffc90000007bb0 R08: ffff8880b8e3580b R09: 1ffff110171c6b01
R10: dffffc0000000000 R11: ffffed10171c6b02 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+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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:slab_post_alloc_hook+0x4f/0x480 mm/slab.h:738
Code: 48 85 c9 74 3f 31 db 41 0f b6 e9 eb 08 48 ff c3 49 39 dc 74 2f 49 8b 34 df 4c 89 ef 44 89 f2 89 e9 e8 55 83 00 00 49 89 04 df <40> 84 ed 74 de 48 85 c0 74 d9 41 8b 55 1c 48 89 c7 31 f6 e8 39 7d
RSP: 0018:ffffc900046cfb10 EFLAGS: 00000286
RAX: ffff88807bae0a00 RBX: 0000000000000000 RCX: 0b599256b2567500
RDX: 000000000000000c RSI: ffffffff8a4000cc RDI: 0000000000000dc0
RBP: 0000000000000001 R08: ffff88823b400000 R09: 0000000000000001
R10: 000000005cf2ef47 R11: fffffbfff1c3faee R12: 0000000000000001
R13: ffff888017627a00 R14: 0000000000000dc0 R15: ffffc900046cfb80
 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]
 __alloc_file+0x25/0x230 fs/file_table.c:138
 alloc_empty_file+0x90/0x180 fs/file_table.c:187
 alloc_file+0x5c/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:12604 [inline]
 __se_sys_perf_event_open+0xc26/0x1ec0 kernel/events/core.c:12378
 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: 0033:0x7f390fd9c799
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:00007f3910bc8028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f3910016090 RCX: 00007f390fd9c799
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f390fe32c99 R08: 0000000000000008 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3910016128 R14: 00007f3910016090 R15: 00007ffe48369458
 </TASK>