rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): (detected by 1, t=10502 jiffies, g=146861, q=238) rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295041767-4295031265), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10502 jiffies! g146861 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:28816 pid: 14 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline] rcu_gp_kthread+0xd07/0x2300 kernel/rcu/tree.c:2177 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 29838 Comm: syz-executor.5 Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:perf_exclude_event+0x150/0x190 kernel/events/core.c:9272 Code: 48 8b 9d 88 00 00 00 31 ff 45 31 e4 83 e3 03 48 89 de e8 23 b4 e3 ff 48 85 db 41 0f 94 c4 e8 f7 ab e3 ff 44 89 e0 5b 5d 41 5c <41> 5d c3 e8 e8 ab e3 ff 41 bc 01 00 00 00 5b 44 89 e0 5d 41 5c 41 RSP: 0018:ffffc90000007bf0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 1ffff92000000f84 RCX: 0000000000000000 RDX: ffff888057040000 RSI: ffffffff819116b9 RDI: 0000000000000003 RBP: ffffc90000007e20 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8191166f R11: 0000000000000000 R12: ffff88802b20ea08 R13: 0000000000000000 R14: ffff88802b20e8a0 R15: ffffffff8191ebc0 FS: 00007f8bef80c700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000970004 CR3: 000000002887e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_swevent_hrtimer+0x2b4/0x3f0 kernel/events/core.c:10538 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1601 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x3c9/0xb40 kernel/locking/qspinlock.c:508 Code: 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 41 83 ec 01 0f 84 72 04 00 00 41 0f b6 45 00 <38> d8 7f 08 84 c0 0f 85 91 05 00 00 0f b6 45 00 84 c0 75 db be 02 RSP: 0018:ffffc9000167f4b0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffffffff1812810 RDX: 0000000000000001 RSI: ffffffff817acfb1 RDI: ffffffff8132b571 RBP: ffffffff8c094080 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817acf79 R11: 0000000000000000 R12: 0000000000004d07 R13: fffffbfff1812810 R14: 0000000000000001 R15: ffff8880b9c36000 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:354 [inline] preload_this_cpu_lock mm/vmalloc.c:1450 [inline] alloc_vmap_area+0x1ba/0x1e10 mm/vmalloc.c:1491 __get_vm_area_node+0x128/0x380 mm/vmalloc.c:2370 __vmalloc_node_range+0x135/0x970 mm/vmalloc.c:2906 __vmalloc_node mm/vmalloc.c:2963 [inline] vzalloc+0x67/0x80 mm/vmalloc.c:3016 bpf_check+0x1e1/0xbe80 kernel/bpf/verifier.c:13329 bpf_prog_load+0xe60/0x2160 kernel/bpf/syscall.c:2234 __sys_bpf+0x668/0x5520 kernel/bpf/syscall.c:4429 __do_sys_bpf kernel/bpf/syscall.c:4533 [inline] __se_sys_bpf kernel/bpf/syscall.c:4531 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4531 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8bef80c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9 RDX: 0000000000000078 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe0dfb19ef R14: 00007f8bef80c300 R15: 0000000000022000