Memory cgroup stats for /syz5: cache:188KB rss:295128KB rss_huge:40960KB shmem:80KB mapped_file:0KB dirty:0KB writeback:0KB swap:0KB inactive_anon:235768KB active_anon:6348KB inactive_file:8KB active_file:4KB unevictable:53144KB Memory cgroup out of memory: Kill process 4690 (syz-executor.5) score 1226 or sacrifice child Killed process 4699 (syz-executor.5) total-vm:72720kB, anon-rss:18328kB, file-rss:34816kB, shmem-rss:0kB rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 0, t=10502 jiffies, g=257753, q=98) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295172073-4295161570), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.5 R running task 25792 4694 8199 0x80000002 Call Trace: sched_show_task kernel/sched/core.c:5338 [inline] sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5313 print_other_cpu_stall kernel/rcu/tree.c:1430 [inline] check_cpu_stall kernel/rcu/tree.c:1557 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0xaa1/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1638 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:168 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:preempt_count_add+0x7b/0x1b0 kernel/sched/core.c:3236 Code: 00 00 fc ff df 48 89 da 83 e3 07 48 c1 ea 03 83 c3 03 65 44 01 25 05 f7 b8 7e 0f b6 04 02 38 c3 7c 08 84 c0 0f 85 fe 00 00 00 <8b> 15 bf 43 81 09 85 d2 75 15 65 8b 05 e4 f6 b8 7e 0f b6 c0 3d f4 RSP: 0018:ffff88820aabf210 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000004 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 1ffffffff1594754 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88820aabf220 R08: 1ffff11015d04732 R09: ffffed1015d04733 R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000001 R13: ffff888054e4cac0 R14: 0000000000000000 R15: 0000000000000000 rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1076 [inline] rcu_lockdep_current_cpu_online+0x37/0x1c0 kernel/rcu/tree.c:1068 rcu_read_lock_held+0x8a/0xd0 kernel/rcu/update.c:285 css_next_descendant_pre+0x102/0x190 kernel/cgroup/cgroup.c:3949 mem_cgroup_iter+0x39e/0xac0 mm/memcontrol.c:971 shrink_node+0x20d/0x1450 mm/vmscan.c:2702 shrink_zones mm/vmscan.c:2966 [inline] do_try_to_free_pages+0x3cb/0x11c0 mm/vmscan.c:3024 try_to_free_mem_cgroup_pages+0x32b/0x920 mm/vmscan.c:3322 try_charge+0x51d/0x1490 mm/memcontrol.c:2262 mem_cgroup_try_charge+0x259/0x6b0 mm/memcontrol.c:5991 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:6006 wp_page_copy+0x430/0x16a0 mm/memory.c:2520 do_wp_page+0x57d/0x10b0 mm/memory.c:2799 handle_pte_fault mm/memory.c:4057 [inline] __handle_mm_fault+0x2305/0x3f80 mm/memory.c:4165 handle_mm_fault+0x1b5/0x690 mm/memory.c:4202 faultin_page mm/gup.c:530 [inline] __get_user_pages+0x609/0x1860 mm/gup.c:730 populate_vma_page_range+0x20d/0x2a0 mm/gup.c:1234 __mm_populate+0x204/0x380 mm/gup.c:1282 mm_populate include/linux/mm.h:2323 [inline] __do_sys_mlockall mm/mlock.c:818 [inline] __se_sys_mlockall mm/mlock.c:795 [inline] __x64_sys_mlockall+0x35c/0x520 mm/mlock.c:795 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b349 Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4b94dddc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: ffffffffffffffda RBX: 00007f4b94dde6d4 RCX: 000000000045b349 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000730 R14: 00000000004c8a1a R15: 000000000075bf2c rcu: rcu_preempt kthread starved for 10547 jiffies! g257753 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29104 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1806 rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415