syzbot

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10472 ticks this GP) idle=22ec/1/0x4000000000000000 softirq=17574/18185 fqs=4543
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1955614       1456            0
rcu: 	cputime:    15870      36615           38   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=21133 q=212 ncpus=2)
CPU: 0 PID: 7848 Comm: syz-executor262 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:slab_pre_alloc_hook+0x0/0x310 mm/slab.h:711
Code: c8 75 02 e9 3d fb ff ff 48 c7 c7 e0 b1 e2 8c 48 89 ee e8 83 c8 75 02 e9 f0 fd ff ff e8 a9 5f 24 ff e9 7c ff ff ff 0f 1f 40 00 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 18 44 89 c5 49 89 cf 48 89
RSP: 0018:ffffc90000007868 EFLAGS: 00000246
RAX: ffffffff885c3835 RBX: 0000000000000000 RCX: 0000000000000001
RDX: ffffc90000007880 RSI: 0000000000000000 RDI: ffff88801d24d8c0
RBP: ffffc9000000791c R08: 0000000000082820 R09: 0000000000000000
R10: ffff88802346a8c0 R11: fffffbfff1c94426 R12: 00000000000000c0
R13: 00000000000002c0 R14: 0000000000082820 R15: ffff88801d24d8c0
FS:  000055555f793480(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000078aeb000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 slab_alloc_node mm/slub.c:3477 [inline]
 kmem_cache_alloc_node+0x60/0x330 mm/slub.c:3540
 kmalloc_reserve+0x95/0x240 net/core/skbuff.c:562
 __alloc_skb+0x138/0x2c0 net/core/skbuff.c:653
 __netdev_alloc_skb+0x10c/0x500 net/core/skbuff.c:717
 netdev_alloc_skb include/linux/skbuff.h:3272 [inline]
 dev_alloc_skb include/linux/skbuff.h:3285 [inline]
 __ieee80211_beacon_get+0xe17/0x1600 net/mac80211/tx.c:5447
 ieee80211_beacon_get_tim+0xb8/0x560 net/mac80211/tx.c:5569
 ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
 mac80211_hwsim_beacon_tx+0x3c7/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:766
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802
 mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
 __run_hrtimer kernel/time/hrtimer.c:1750 [inline]
 __hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1814
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:finish_task_switch+0x26a/0x920 kernel/sched/core.c:5254
Code: 0f 84 37 01 00 00 48 85 db 0f 85 56 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 80 ca 14 09 e8 4b a4 2f 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000c35f9b8 EFLAGS: 00000286
RAX: d9a4bef203fe4800 RBX: 0000000000000000 RCX: d9a4bef203fe4800
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: ffffffff8afc6f80
RBP: ffffc9000c35fa10 R08: ffffffff90d945df R09: 1ffffffff21b28bb
R10: dffffc0000000000 R11: fffffbfff21b28bc R12: ffff8880222d0000
R13: dffffc0000000000 R14: ffffffff8ca93440 R15: ffff8880b8e3cac8
 context_switch kernel/sched/core.c:5383 [inline]
 __schedule+0x14da/0x44d0 kernel/sched/core.c:6699
 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6866
 preempt_schedule+0xab/0xc0 kernel/sched/core.c:6890
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irq+0x40/0x50 kernel/locking/spinlock.c:202
 perf_remove_from_context+0xdb/0x1d0 kernel/events/core.c:2448
 perf_event_release_kernel+0x1de/0x8c0 kernel/events/core.c:5417
 perf_release+0x3b/0x40 kernel/events/core.c:5511
 __fput+0x234/0x970 fs/file_table.c:384
 __do_sys_close fs/open.c:1573 [inline]
 __se_sys_close+0x15f/0x220 fs/open.c:1558
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3b21e6b64a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 83 83 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 e3 83 02 00 8b 44 24
RSP: 002b:00007ffee824c7e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f3b21e6b64a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000003
R10: ffffffffffffffff R11: 0000000000000293 R12: 00007ffee824c818
R13: 00007ffee824c830 R14: 00007ffee824c870 R15: 000000000000080a
 </TASK>