rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=48b/1/0x4000000000000002 softirq=7767/7768 fqs=5248 (detected by 1, t=10502 jiffies, g=9017, q=1444) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4784 Comm: syz.3.127 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:perf_tp_event_match kernel/events/core.c:9995 [inline] RIP: 0010:perf_tp_event+0x209/0xb50 kernel/events/core.c:10046 Code: 4c 8d a0 88 00 00 00 4c 89 e3 48 c1 eb 03 4d 8d bd d8 01 00 00 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 0f 85 d2 01 00 00 45 8b 3f 44 89 fe 83 e6 01 31 ff e8 9f eb RSP: 0018:ffffc900011eed80 EFLAGS: 00000802 RAX: 0000000000000000 RBX: 1ffff11017206a2b RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc900011eefe8 R08: dffffc0000000000 R09: ffffed10055a6001 R10: ffffed10055a6001 R11: 1ffff110055a6000 R12: ffff8880b9035158 R13: ffff88804d7547a0 R14: 0000000000000000 R15: ffff88804d754978 FS: 00007f8a6caa76c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000079ce3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021 perf_trace_preemptirq_template+0x2be/0x380 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713 RIP: 0010:rcu_read_unlock_special+0x84/0x480 kernel/rcu/tree_plugin.h:674 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 dd 13 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc900011ef240 EFLAGS: 00000206 RAX: 37e5b43ae2853200 RBX: 1ffff9200023de4c RCX: 37e5b43ae2853200 RDX: dffffc0000000000 RSI: ffffffff8a0b1620 RDI: ffffffff8a59a240 RBP: ffffc900011ef310 R08: dffffc0000000000 R09: ffffed101720765a R10: ffffed101720765a R11: 1ffff11017207659 R12: ffffffff8c120900 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:771 [inline] get_mem_cgroup_from_objcg+0x109/0x120 mm/memcontrol.c:2817 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+0x275/0x430 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+0x11c3/0x4390 kernel/sched/core.c:6395 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6799 irqentry_exit+0x63/0x70 kernel/entry/common.c:432 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:mod_node_state+0x72/0x120 mm/vmstat.c:629 Code: 41 f7 c4 ff 0f 00 00 0f 85 a4 00 00 00 41 c1 fc 0c 49 63 f4 eb 11 89 c8 65 44 0f b0 64 1a 01 38 c8 0f 84 81 00 00 00 65 8a 02 <48> 0f be f8 65 8a 4c 1a 01 4c 0f be e1 49 01 f4 4d 89 e0 49 f7 d8 RSP: 0018:ffffc900011ef7c0 EFLAGS: 00000282 RAX: 0000000000000018 RBX: 0000000000000006 RCX: dffffc0000000000 RDX: 0000000000040cc0 RSI: fffffffffffffff8 RDI: ffff88813fffb000 RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed101720765a R10: ffffed101720765a R11: 1ffff11017207659 R12: 00000000fffffff8 R13: ffffffff7fffffff R14: 0000000000000006 R15: ffff88813fffb000 unaccount_slab_page mm/slab.h:436 [inline] __free_slab+0x189/0x370 mm/slub.c:1999 free_slab mm/slub.c:2015 [inline] discard_slab mm/slub.c:2021 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2507 put_cpu_partial+0x12d/0x190 mm/slub.c:2587 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3233 __d_alloc+0x2a/0x6f0 fs/dcache.c:1749 d_alloc_pseudo+0x19/0x70 fs/dcache.c:1878 alloc_file_pseudo+0xc8/0x1f0 fs/file_table.c:256 __anon_inode_getfile fs/anon_inodes.c:109 [inline] anon_inode_getfile+0xc1/0x1a0 fs/anon_inodes.c:147 __do_sys_perf_event_open kernel/events/core.c:12613 [inline] __se_sys_perf_event_open+0xbd2/0x1b80 kernel/events/core.c:12387 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: 0033:0x7f8a6e860be9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8a6caa7038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f8a6ea98090 RCX: 00007f8a6e860be9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480 RBP: 00007f8a6e8e3e19 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8a6ea98128 R14: 00007f8a6ea98090 R15: 00007fff1b7e40e8