rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2654 jiffies s: 149093 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: 12843 Comm: syz.0.2340 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:debug_smp_processor_id+0xe/0x10 lib/smp_processor_id.c:60 Code: 48 c7 c7 60 9e bc 8c 4c 89 f6 e8 ed 0a 0c fa e9 6e ff ff ff 00 00 cc cc 00 00 cc cc 48 c7 c7 c0 0c df 8a 48 c7 c6 00 0d df 8a 00 55 41 57 41 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 RSP: 0018:ffffc900001e0998 EFLAGS: 00000003 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff812e2d3a RDX: 0000000000000000 RSI: ffffffff8adf0d00 RDI: ffffffff8adf0cc0 RBP: 0000000000000000 R08: ffffffff8e1fcc2f R09: 1ffffffff1c3f985 R10: dffffc0000000000 R11: fffffbfff1c3f986 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 FS: 00007fa2f19e36c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000049de2000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline] rcu_is_watching+0x11/0xa0 kernel/rcu/tree.c:721 trace_irq_work_exit arch/x86/include/asm/trace/irq_vectors.h:64 [inline] __sysvec_irq_work+0x109/0x350 arch/x86/kernel/irq_work.c:23 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0x4a/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 92 31 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:ffffc900001e0aa0 EFLAGS: 00000206 RAX: b7b39fb4540b3200 RBX: 1ffff9200003c15c RCX: b7b39fb4540b3200 RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0d20 RBP: ffffc900001e0b90 R08: ffff8880b8f3580b R09: 1ffff110171e6b01 R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000246 R13: dffffc0000000000 R14: ffff8880b8f3b900 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:1747 [inline] __hrtimer_run_queues+0x560/0xd70 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 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5124 Code: 0f 84 3b 01 00 00 48 85 db 0f 85 5a 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 d0 fd dc 08 e8 0b 2d 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:ffffc90004b1f8b8 EFLAGS: 00000286 RAX: b7b39fb4540b3200 RBX: 0000000000000000 RCX: b7b39fb4540b3200 RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0d20 RBP: ffffc90004b1f910 R08: ffff8880b8f3580b R09: 1ffff110171e6b01 R10: dffffc0000000000 R11: ffffed10171e6b02 R12: ffff888059d23b80 R13: dffffc0000000000 R14: ffff88802a1e3b80 R15: ffff8880b8f3b5d0 context_switch kernel/sched/core.c:5248 [inline] __schedule+0x11d9/0x40e0 kernel/sched/core.c:6562 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874 irqentry_exit+0x63/0x70 kernel/entry/common.c:439 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:obj_cgroup_charge+0x32a/0x620 mm/memcontrol.c:3358 Code: 84 24 80 00 00 00 f7 84 24 80 00 00 00 00 02 00 00 41 c6 44 1f 08 f8 0f 85 21 01 00 00 41 f7 c4 00 02 00 00 74 01 fb 45 31 e4 <80> 7c 24 14 00 0f 85 a0 00 00 00 48 8b 44 24 18 49 89 c6 49 c1 ee RSP: 0018:ffffc90004b1fc20 EFLAGS: 00000246 RAX: b7b39fb4540b3200 RBX: dffffc0000000000 RCX: b7b39fb4540b3200 RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0d20 RBP: ffffc90004b1fd18 R08: ffff8880b8f3580b R09: 1ffff110171e6b01 R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000000 R13: ffff8880b8f36950 R14: ffff8880b8f36978 R15: 1ffff92000963f8c memcg_slab_pre_alloc_hook mm/slab.h:501 [inline] slab_pre_alloc_hook+0x2e7/0x310 mm/slab.h:715 slab_alloc_node mm/slub.c:3279 [inline] slab_alloc mm/slub.c:3367 [inline] __kmem_cache_alloc_lru mm/slub.c:3374 [inline] kmem_cache_alloc_lru+0x49/0x2e0 mm/slub.c:3390 alloc_inode_sb include/linux/fs.h:3245 [inline] sock_alloc_inode+0x24/0xc0 net/socket.c:306 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x5f/0x1c0 fs/inode.c:1063 sock_alloc net/socket.c:631 [inline] __sock_create+0x129/0x940 net/socket.c:1513 sock_create net/socket.c:1605 [inline] __sys_socketpair+0x1bd/0x540 net/socket.c:1732 __do_sys_socketpair net/socket.c:1785 [inline] __se_sys_socketpair net/socket.c:1782 [inline] __x64_sys_socketpair+0x97/0xb0 net/socket.c:1782 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: 0033:0x7fa2f0b9bf79 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:00007fa2f19e3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007fa2f0e15fa0 RCX: 00007fa2f0b9bf79 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000001e RBP: 00007fa2f0c327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa2f0e16038 R14: 00007fa2f0e15fa0 R15: 00007ffec7e1d948