rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=d2a/1/0x4000000000000000 softirq=132927/132928 fqs=0 (t=10500 jiffies g=245353 q=479) rcu: rcu_preempt kthread starved for 10500 jiffies! g245353 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 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:29080 pid: 10 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 schedule_timeout+0x148/0x250 kernel/time/timer.c:1879 rcu_gp_fqs_loop kernel/rcu/tree.c:1888 [inline] rcu_gp_kthread+0xae5/0x1b50 kernel/rcu/tree.c:2058 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 NMI backtrace for cpu 0 CPU: 0 PID: 30466 Comm: syz-executor.5 Not tainted 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x194/0x1cf kernel/rcu/tree_stall.h:318 print_cpu_stall kernel/rcu/tree_stall.h:551 [inline] check_cpu_stall kernel/rcu/tree_stall.h:625 [inline] rcu_pending kernel/rcu/tree.c:3637 [inline] rcu_sched_clock_irq.cold+0x5b3/0xccd kernel/rcu/tree.c:2519 update_process_times+0x25/0xa0 kernel/time/timer.c:1710 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1524 [inline] __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1588 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline] sysvec_apic_timer_interrupt+0x4c/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199 Code: c0 d8 3b b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 36 06 c0 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 cb 7d 59 f9 65 8b 05 c4 c8 0b 78 85 c0 74 02 5d RSP: 0018:ffffc90000007e00 EFLAGS: 00000286 RAX: 1ffffffff136c77b RBX: ffffffff8656feb0 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff87f6357f RBP: ffff8880ae6255c0 R08: 0000000000000001 R09: ffffffff8c5f39e7 R10: fffffbfff18be73c R11: 0000000000000001 R12: ffffc90000007e90 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880ae6255c0 expire_timers kernel/time/timer.c:1457 [inline] __run_timers.part.0+0x66c/0xaa0 kernel/time/timer.c:1755 __run_timers kernel/time/timer.c:1736 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768 __do_softirq+0x2de/0xa24 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:__sanitizer_cov_trace_pc+0x45/0x60 kernel/kcov.c:202 Code: f6 c4 01 74 35 8b 82 24 14 00 00 85 c0 74 2b 8b 82 00 14 00 00 83 f8 02 75 20 48 8b 8a 08 14 00 00 8b 92 04 14 00 00 48 8b 01 <48> 83 c0 01 48 39 c2 76 07 48 89 34 c1 48 89 01 c3 66 2e 0f 1f 84 RSP: 0018:ffffc9001343f738 EFLAGS: 00000246 RAX: 000000000000c74d RBX: 0000000000d8c000 RCX: ffffc90015016000 RDX: 0000000000040000 RSI: ffffffff81a9b782 RDI: 0000000000000007 RBP: 0000000000006000 R08: 0000000000000001 R09: ffffffff8c5f39e7 R10: 00001ffffffffffe R11: 0000000000000001 R12: 0000000000006000 R13: 0000000000000000 R14: ffffc90000d8c000 R15: dffffc0000000000 __purge_vmap_area_lazy+0x7b2/0x1b70 mm/vmalloc.c:1373 _vm_unmap_aliases.part.0+0x3cc/0x4d0 mm/vmalloc.c:1770 _vm_unmap_aliases mm/vmalloc.c:1744 [inline] vm_unmap_aliases+0x42/0x50 mm/vmalloc.c:1793 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1732 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1789 [inline] set_memory_x+0xb2/0x110 arch/x86/mm/pat/set_memory.c:1922 bpf_jit_binary_lock_ro include/linux/filter.h:816 [inline] bpf_int_jit_compile+0xdc6/0x111e arch/x86/net/bpf_jit_comp.c:1929 bpf_prog_select_runtime+0x591/0xb00 kernel/bpf/core.c:1807 bpf_prog_load+0xdda/0x1b80 kernel/bpf/syscall.c:2203 __do_sys_bpf+0x20a3/0x4c20 kernel/bpf/syscall.c:4178 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1e915e1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000001c40 RCX: 000000000045d5b9 RDX: 0000000000000048 RSI: 0000000020000080 RDI: 0000000000000005 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffd8e65d4cf R14: 00007f1e915e29c0 R15: 000000000118cf4c