Memory cgroup stats for /syz2: cache:0KB rss:295672KB rss_huge:8192KB shmem:0KB mapped_file:0KB dirty:0KB writeback:0KB swap:0KB inactive_anon:273024KB active_anon:6836KB inactive_file:8KB active_file:4KB unevictable:15984KB Memory cgroup out of memory: Kill process 12190 (syz-executor.2) score 1163 or sacrifice child Killed process 12190 (syz-executor.2) total-vm:74964kB, anon-rss:18512kB, file-rss:34816kB, shmem-rss:0kB rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=fee/1/0x4000000000000002 softirq=16788/16789 fqs=5 rcu: (t=10500 jiffies g=14461 q=451) rcu: rcu_preempt kthread starved for 10490 jiffies! g14461 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29744 10 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x4d1/0xf20 kernel/time/timer.c:1806 rcu_gp_kthread+0xcee/0x2060 kernel/rcu/tree.c:2202 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 NMI backtrace for cpu 0 CPU: 0 PID: 12838 Comm: syz-executor.5 Not tainted 4.19.112-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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x170/0x1bb kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x634/0xddc kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1638 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x2fc/0xd50 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:lock_release+0x10/0x820 kernel/locking/lockdep.c:3912 Code: c4 4d 00 e9 fb fe ff ff 48 c7 c7 c0 1a 7f 8b e8 46 c4 4d 00 e9 88 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 <41> 54 49 89 d4 55 48 89 fd 53 48 83 c4 80 48 c7 44 24 20 b3 8a b5 RSP: 0018:ffff8881ed26f2e8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffffffffffffffff RCX: ffffffff81567a3c RDX: ffffffff81a2389d RSI: 0000000000000001 RDI: ffffffff88b92960 RBP: ffff88809a9e6790 R08: ffff88801a856500 R09: ffffed1015cc4733 R10: ffffed1015cc4732 R11: ffff8880ae623993 R12: ffff8881ed26f4d0 R13: 1ffff1103da4de6a R14: ffff88809a9e6780 R15: dffffc0000000001 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:762 [inline] percpu_ref_put_many+0xa5/0x170 include/linux/percpu-refcount.h:286 percpu_ref_put include/linux/percpu-refcount.h:300 [inline] css_put include/linux/cgroup.h:393 [inline] mem_cgroup_iter+0x973/0xb80 mm/memcontrol.c:1011 shrink_node+0x3b7/0x1350 mm/vmscan.c:2763 shrink_zones mm/vmscan.c:2969 [inline] do_try_to_free_pages+0x3a3/0x1090 mm/vmscan.c:3027 try_to_free_mem_cgroup_pages+0x2ef/0x8b0 mm/vmscan.c:3325 try_charge+0x4ca/0x1300 mm/memcontrol.c:2264 mem_cgroup_try_charge+0x249/0x5c0 mm/memcontrol.c:5993 mem_cgroup_try_charge_delay+0x1a/0xa0 mm/memcontrol.c:6008 wp_page_copy+0x3fe/0x1530 mm/memory.c:2520 do_wp_page+0x518/0xfa0 mm/memory.c:2799 handle_pte_fault mm/memory.c:4057 [inline] __handle_mm_fault+0x21a4/0x3b60 mm/memory.c:4165 handle_mm_fault+0x1a5/0x670 mm/memory.c:4202 faultin_page mm/gup.c:530 [inline] __get_user_pages+0x599/0x1650 mm/gup.c:730 populate_vma_page_range+0x1fd/0x290 mm/gup.c:1234 __mm_populate+0x1e8/0x350 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+0x340/0x500 mm/mlock.c:795 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c849 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:00007fe95a5afc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: ffffffffffffffda RBX: 00007fe95a5b06d4 RCX: 000000000045c849 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000735 R14: 00000000004c9f5c R15: 000000000076bf0c