rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (1 GPs behind) idle=6fb/1/0x4000000000000000 softirq=11463/11464 fqs=32 (detected by 0, t=10502 jiffies, g=14721, q=210) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4683 Comm: syz.0.312 Not tainted 5.15.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:__lock_acquire+0x518/0x1ff0 kernel/locking/lockdep.c:4962 Code: c8 e3 0f 00 0f 84 8b 05 00 00 31 db 48 81 c3 b8 00 00 00 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 b1 12 00 00 44 0f b6 33 <48> 8b 44 24 38 0f b6 04 10 84 c0 0f 85 c0 12 00 00 41 8b 1f 81 e3 RSP: 0018:ffffc90000dd0a80 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffffff8f96a938 RCX: ffffffff8162b70b RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff8fc700c8 RBP: 000000000000000a R08: dffffc0000000000 R09: fffffbfff1f8e01a R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000002 R13: ffff88801e51c668 R14: 0000000000000002 R15: ffff88801e51c6e0 FS: 00005555568f7500(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3151bff8 CR3: 0000000079eb0000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170 __run_hrtimer kernel/time/hrtimer.c:1690 [inline] __hrtimer_run_queues+0x662/0xcf0 kernel/time/hrtimer.c:1750 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline] RIP: 0010:__local_bh_enable_ip+0x16c/0x1f0 kernel/softirq.c:390 Code: 8a e8 38 a3 e5 08 65 66 8b 05 f0 19 b6 7e 66 85 c0 75 57 bf 01 00 00 00 e8 e1 eb 09 00 e8 ac 62 39 00 fb 65 8b 05 9c f0 b4 7e <85> c0 75 05 e8 6b 0d b3 ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c RSP: 0018:ffffc90003367c20 EFLAGS: 00000282 RAX: 0000000080000000 RBX: 1ffff9200066cf88 RCX: ffffffff816319d8 RDX: dffffc0000000000 RSI: ffffffff8a8b2a00 RDI: ffffffff8ad8f800 RBP: ffffc90003367cd8 R08: dffffc0000000000 R09: fffffbfff1f8e030 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff9200066cf8c R14: ffffc90003367c60 R15: 0000000000000201 spin_unlock_bh include/linux/spinlock.h:408 [inline] unlock_sock_fast include/net/sock.h:1737 [inline] mptcp_close+0x3b3/0xa10 net/mptcp/protocol.c:2778 inet_release+0x174/0x1f0 net/ipv4/af_inet.c:434 __sock_release net/socket.c:649 [inline] sock_close+0xcd/0x230 net/socket.c:1336 __fput+0x3fe/0x8e0 fs/file_table.c:280 task_work_run+0x129/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f47149ab9f9 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:00007ffd2e712d58 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 000000000001e059 RCX: 00007f47149ab9f9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007ffd2e712e30 R08: 0000000000000001 R09: 00007ffd2e71303f R10: 00007f4714832000 R11: 0000000000000246 R12: 0000000000000032 R13: 00007ffd2e712e50 R14: 00007ffd2e712e70 R15: ffffffffffffffff rcu: rcu_preempt kthread starved for 10438 jiffies! g14721 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:27064 pid: 15 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376 schedule+0x11b/0x1f0 kernel/sched/core.c:6459 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 rcu: Stack dump where RCU GP kthread last ran: NMI backtrace for cpu 0 CPU: 0 PID: 4666 Comm: syz.3.306 Not tainted 5.15.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline] rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487 print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592 check_cpu_stall kernel/rcu/tree_stall.h:745 [inline] rcu_pending kernel/rcu/tree.c:3932 [inline] rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619 update_process_times+0x196/0x200 kernel/time/timer.c:1818 tick_sched_handle kernel/time/tick-sched.c:254 [inline] tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473 __run_hrtimer kernel/time/hrtimer.c:1686 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1750 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0xa93/0xd90 kernel/smp.c:969 Code: 04 03 84 c0 0f 85 84 00 00 00 45 8b 7d 00 44 89 fe 83 e6 01 31 ff e8 7c cf 0b 00 41 83 e7 01 75 07 e8 11 cc 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00 RSP: 0018:ffffc90002e67220 EFLAGS: 00000246 RAX: ffffffff81749574 RBX: 1ffff110173680b9 RCX: 0000000000040000 RDX: ffffc90003c2d000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90002e67360 R08: ffffffff81749544 R09: fffffbfff1f8e01a R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: ffff8880b9b405c8 R14: ffff8880b9a3b3c0 R15: 0000000000000001 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135 __purge_vmap_area_lazy+0x294/0x1740 mm/vmalloc.c:1683 _vm_unmap_aliases+0x453/0x4e0 mm/vmalloc.c:2107 change_page_attr_set_clr+0x308/0x1050 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline] set_memory_ro+0xa1/0xe0 arch/x86/mm/pat/set_memory.c:1943 bpf_jit_binary_lock_ro include/linux/filter.h:892 [inline] bpf_int_jit_compile+0xbf57/0xc6e0 arch/x86/net/bpf_jit_comp.c:2372 bpf_prog_select_runtime+0x701/0x9f0 kernel/bpf/core.c:1930 bpf_prog_load+0x131c/0x1b60 kernel/bpf/syscall.c:2357 __sys_bpf+0x343/0x670 kernel/bpf/syscall.c:4651 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline] __se_sys_bpf kernel/bpf/syscall.c:4753 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f2dab2f49f9 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:00007f2da9771038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f2dab490f80 RCX: 00007f2dab2f49f9 RDX: 0000000000000090 RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 00007f2dab3628ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2dab490f80 R15: 00007ffe25a7dc08