rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-....: (2 ticks this GP) idle=8d9/1/0x4000000000000002 softirq=66361/66361 fqs=5248 
	(detected by 0, t=10502 jiffies, g=86669, q=451)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 22563 Comm: syz.4.4778 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:asm_sysvec_irq_work+0x0/0x20 arch/x86/include/asm/idtentry.h:707
Code: e9 a5 03 00 00 90 90 90 90 90 0f 01 ca fc 6a ff e8 a5 02 00 00 48 89 c4 48 89 e7 e8 7a 3c dc ff e9 85 03 00 00 90 90 90 90 90 <0f> 01 ca fc 6a ff e8 85 02 00 00 48 89 c4 48 89 e7 e8 4a 41 dc ff
RSP: 0018:ffffc90000dd0ad8 EFLAGS: 00000006
RAX: 2e7dceffb9d75f00 RBX: 1ffff920001ba164 RCX: 2e7dceffb9d75f00
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f980
RBP: ffffc90000dd0bd8 R08: ffff8880b913b30b R09: 1ffff11017227661
R10: dffffc0000000000 R11: ffffed1017227662 R12: ffffffff8c322f00
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f269eda56c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f269eda4ff8 CR3: 0000000046720000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff3 DR7: 0000000000000600
Call Trace:
 <IRQ>
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
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 f2 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000dd0b00 EFLAGS: 00000206
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 ieee80211_iterate_active_interfaces_atomic+0x132/0x140 net/mac80211/util.c:831
 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4f2/0xb70 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:773 [inline]
RIP: 0010:get_mem_cgroup_from_objcg+0x109/0x120 mm/memcontrol.c:2817
Code: d8 b2 0b 00 75 1f c6 05 3f d8 b2 0b 01 48 c7 c7 80 ed 35 8a be 02 03 00 00 48 c7 c2 20 ee 35 8a e8 9c 4e ee 07 e8 d7 33 a2 ff <e8> 22 fb ff ff 4c 89 f0 5b 41 5c 41 5d 41 5e 41 5f c3 0f 1f 44 00
RSP: 0018:ffffc9000362f6f0 EFLAGS: 00000287
RAX: 0000000000000000 RBX: ffff888023995a90 RCX: 2e7dceffb9d75f00
RDX: 0000000000000001 RSI: ffffffff8a79f960 RDI: ffff88802c510000
RBP: 0000000000000000 R08: ffffffff8d89e36f R09: 1ffffffff1b13c6d
R10: dffffc0000000000 R11: fffffbfff1b13c6e R12: dffffc0000000000
R13: 1ffff11004732b52 R14: ffff88802b0e8000 R15: ffff88802b0e8054
 obj_cgroup_uncharge_pages mm/memcontrol.c:2992 [inline]
 __memcg_kmem_uncharge_page+0x74/0x140 mm/memcontrol.c:3083
 memcg_kmem_uncharge_page include/linux/memcontrol.h:1703 [inline]
 free_thread_stack+0x1ea/0x430 kernel/fork.c:283
 release_task_stack kernel/fork.c:433 [inline]
 put_task_stack+0x97/0x140 kernel/fork.c:444
 finish_task_switch+0x26f/0x640 kernel/sched/core.c:4961
 context_switch kernel/sched/core.c:5052 [inline]
 __schedule+0x11f7/0x43c0 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue_me+0x22d/0x440 kernel/futex/core.c:2863
 futex_wait+0x256/0x680 kernel/futex/core.c:2964
 do_futex+0xdb2/0x12b0 kernel/futex/core.c:3982
 __do_sys_futex kernel/futex/core.c:4059 [inline]
 __se_sys_futex+0x389/0x420 kernel/futex/core.c:4040
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f26a0b6c819
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:00007f269eda50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f26a0de6098 RCX: 00007f26a0b6c819
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f26a0de6098
RBP: 00007f26a0de6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26a0de6128 R14: 00007ffe17be4060 R15: 00007ffe17be4148
 </TASK>