oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=syz5,mems_allowed=0-1,oom_memcg=/syz5,task_memcg=/syz5,task=syz-executor5,pid=24177,uid=0 Memory cgroup out of memory: Kill process 24177 (syz-executor5) score 1113 or sacrifice child Killed process 24177 (syz-executor5) total-vm:72712kB, anon-rss:2220kB, file-rss:35792kB, shmem-rss:0kB rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=6a2/1/0x4000000000000002 softirq=289098/289099 fqs=1 rcu: (t=10500 jiffies g=383417 q=47) rcu: rcu_preempt kthread starved for 4410 jiffies! g383417 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt I25464 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 schedule+0xfe/0x350 kernel/sched/core.c:3516 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1803 rcu_gp_fqs_loop+0x6ba/0x970 kernel/rcu/tree.c:1948 rcu_gp_kthread+0x2bb/0xc10 kernel/rcu/tree.c:2105 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 16783 Comm: syz-executor5 Not tainted 5.0.0-rc2+ #32 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+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree.c:1211 print_cpu_stall.cold+0x227/0x40c kernel/rcu/tree.c:1348 check_cpu_stall kernel/rcu/tree.c:1422 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks+0xb32/0x1380 kernel/rcu/tree.c:2521 update_process_times+0x32/0x80 kernel/time/timer.c:1635 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:lock_acquire+0x259/0x570 kernel/locking/lockdep.c:3844 Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 64 02 00 00 48 83 3d 26 31 2e 08 00 0f 84 d0 01 00 00 48 8b bd 48 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 85 40 ff ff ff RSP: 0018:ffff888038c0e4c8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1325016 RBX: ffff8880879e42c0 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff888038c0e598 R08: 0000000000000003 R09: ffff8880879e4bd8 R10: ffff8880879e4bb8 R11: 0000000000000001 R12: ffffffff899a3f00 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002 rcu_lock_acquire include/linux/rcupdate.h:223 [inline] rcu_read_lock include/linux/rcupdate.h:607 [inline] has_intersects_mems_allowed mm/oom_kill.c:82 [inline] oom_unkillable_task mm/oom_kill.c:167 [inline] oom_unkillable_task+0x17e/0x580 mm/oom_kill.c:154 oom_badness+0xb1/0xa50 mm/oom_kill.c:209 oom_evaluate_task mm/oom_kill.c:344 [inline] oom_evaluate_task+0x368/0x540 mm/oom_kill.c:315 mem_cgroup_scan_tasks+0x105/0x1f0 mm/memcontrol.c:1081 select_bad_process mm/oom_kill.c:373 [inline] out_of_memory+0x796/0x1420 mm/oom_kill.c:1119 mem_cgroup_out_of_memory+0x160/0x210 mm/memcontrol.c:1393 mem_cgroup_oom mm/memcontrol.c:1721 [inline] try_charge+0x12a9/0x19b0 mm/memcontrol.c:2283 mem_cgroup_try_charge+0x43a/0xdb0 mm/memcontrol.c:5913 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:5928 shmem_getpage_gfp+0xa85/0x4b70 mm/shmem.c:1790 shmem_fault+0x25a/0x950 mm/shmem.c:1988 __do_fault+0x176/0x7b0 mm/memory.c:3019 do_read_fault mm/memory.c:3430 [inline] do_fault mm/memory.c:3556 [inline] handle_pte_fault mm/memory.c:3787 [inline] __handle_mm_fault+0x370a/0x55a0 mm/memory.c:3911 handle_mm_fault+0x4ec/0xc80 mm/memory.c:3948 faultin_page mm/gup.c:535 [inline] __get_user_pages+0x8f7/0x1e10 mm/gup.c:738 populate_vma_page_range+0x2bc/0x3b0 mm/gup.c:1247 __mm_populate+0x27e/0x4c0 mm/gup.c:1295 mm_populate include/linux/mm.h:2388 [inline] vm_mmap_pgoff+0x277/0x2b0 mm/util.c:355 ksys_mmap_pgoff+0x102/0x650 mm/mmap.c:1609 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458099 Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f44b1623c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458099 RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 000000000073bf00 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 00007f44b16246d4 R13: 00000000004c3d82 R14: 00000000004d6ce8 R15: 00000000ffffffff sched: RT throttling activated