rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (92 ticks this GP) idle=627/1/0x4000000000000000 softirq=7739/7740 fqs=2125 (detected by 1, t=10504 jiffies, g=8453, q=2259) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4842 Comm: syz.2.144 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:rcu_preempt_deferred_qs_handler+0x1/0x170 kernel/rcu/tree_plugin.h:609 Code: 07 80 c1 03 38 c1 0f 8c 5e fd ff ff 48 c7 c7 c4 d0 69 8d e8 f1 f2 56 00 e9 4d fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 <48> 89 e5 41 57 41 56 41 54 53 48 83 e4 e0 48 81 ec 80 00 00 00 48 RSP: 0018:ffffc900000073d0 EFLAGS: 00000046 RAX: 1ffff11017207640 RBX: ffff8880b903b1f8 RCX: ffff888020f9d940 RDX: ffff888020f9e418 RSI: dffffc0000000000 RDI: ffff8880b903b1f0 RBP: ffffc90000007498 R08: dffffc0000000000 R09: ffffed1017207640 R10: ffffed1017207640 R11: 1ffff1101720763f R12: 1ffff110041f3c83 R13: 0000000000000022 R14: ffff8880b903b1f0 R15: 0000000000000023 FS: 00007f287635c6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2ab84d46c8 CR3: 000000005af70000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: irq_work_single kernel/irq_work.c:155 [inline] irq_work_run_list+0x1bb/0x330 kernel/irq_work.c:177 irq_work_run+0x63/0xe0 kernel/irq_work.c:186 __sysvec_irq_work+0x98/0x240 arch/x86/kernel/irq_work.c:22 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: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 ed 11 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:ffffc900000075a0 EFLAGS: 00000206 RAX: 3cff414f07277d00 RBX: 1ffff92000000eb8 RCX: 3cff414f07277d00 RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: ffffffff8a59e580 RBP: ffffc90000007680 R08: dffffc0000000000 R09: ffffed1017207662 R10: ffffed1017207662 R11: 1ffff11017207661 R12: ffffffff8c120c00 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:772 [inline] netif_receive_skb_list_internal+0x93a/0xb90 net/core/dev.c:5760 gro_normal_list net/core/dev.c:5913 [inline] gro_normal_one net/core/dev.c:5926 [inline] napi_skb_finish net/core/dev.c:6263 [inline] napi_gro_receive+0x4ef/0xa60 net/core/dev.c:6293 receive_buf+0x3793/0x5780 drivers/net/virtio_net.c:1240 virtnet_receive drivers/net/virtio_net.c:1504 [inline] virtnet_poll+0x546/0xef0 drivers/net/virtio_net.c:1617 __napi_poll+0xc0/0x430 net/core/dev.c:7075 napi_poll net/core/dev.c:7142 [inline] net_rx_action+0x4a8/0x9c0 net/core/dev.c:7232 handle_softirqs+0x328/0x820 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x12f/0x220 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 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:preempt_schedule_irq+0xac/0x150 kernel/sched/core.c:6799 Code: 44 24 20 f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 70 bf 01 00 00 00 e8 cf b7 9f f7 e8 1a 31 cc f7 fb bf 01 00 00 00 ef b5 ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc9000334f660 EFLAGS: 00000286 RAX: 3cff414f07277d00 RBX: 0000000000000000 RCX: 3cff414f07277d00 RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: 0000000000000001 RBP: ffffc9000334f700 R08: dffffc0000000000 R09: ffffed1017207662 R10: ffffed1017207662 R11: 1ffff11017207661 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000669ecc 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:refill_stock+0x323/0x520 mm/memcontrol.c:2283 Code: 00 9c 8f 44 24 60 f6 44 24 61 02 48 bb 00 00 00 00 00 fc ff df 75 4e 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <48> 8b 44 24 38 48 c7 04 18 00 00 00 00 66 c7 44 18 09 00 00 c6 44 RSP: 0018:ffffc9000334f7c0 EFLAGS: 00000206 RAX: 3cff414f07277d00 RBX: dffffc0000000000 RCX: 3cff414f07277d00 RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: ffffffff8a59e580 RBP: ffffc9000334f8b0 R08: dffffc0000000000 R09: ffffed1017207662 R10: ffffed1017207662 R11: 1ffff11017207661 R12: ffff88802ae78054 R13: 1ffff11017206c93 R14: 0000000000000a06 R15: ffff8880b9036498 try_charge_memcg+0x1092/0x14a0 mm/memcontrol.c:2726 obj_cgroup_charge_pages+0x87/0x190 mm/memcontrol.c:3018 obj_cgroup_charge+0x1a0/0x310 mm/memcontrol.c:3299 memcg_slab_pre_alloc_hook mm/slab.h:287 [inline] slab_pre_alloc_hook+0x9f/0xc0 mm/slab.h:497 slab_alloc_node mm/slub.c:3139 [inline] slab_alloc mm/slub.c:3233 [inline] kmem_cache_alloc+0x3d/0x290 mm/slub.c:3238 kmem_cache_zalloc include/linux/slab.h:728 [inline] __alloc_file+0x25/0x240 fs/file_table.c:132 alloc_empty_file+0x90/0x180 fs/file_table.c:181 alloc_file+0x5b/0x4f0 fs/file_table.c:223 alloc_file_pseudo+0x17a/0x1f0 fs/file_table.c:263 sock_alloc_file+0xb3/0x240 net/socket.c:464 sock_map_fd net/socket.c:488 [inline] __sys_socket+0x11d/0x170 net/socket.c:1598 __do_sys_socket net/socket.c:1603 [inline] __se_sys_socket net/socket.c:1601 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1601 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: 0033:0x7f28780f56c9 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:00007f287635c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f287834bfa0 RCX: 00007f28780f56c9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000002b RBP: 00007f2878177f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f287834c038 R14: 00007f287834bfa0 R15: 00007ffedfc332d8