Memory cgroup stats for /syz3: cache:0KB rss:298076KB rss_huge:260096KB shmem:0KB mapped_file:0KB dirty:0KB writeback:0KB swap:0KB inactive_anon:79044KB active_anon:72KB inactive_file:4KB active_file:0KB unevictable:219088KB Memory cgroup out of memory: Kill process 11215 (syz-executor.3) score 1120 or sacrifice child Killed process 11229 (syz-executor.3) total-vm:40016kB, anon-rss:18384kB, file-rss:0kB, shmem-rss:0kB rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=16729, q=122) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295043081-4295032578), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.4 R running task 25600 11222 8297 0x80000002 Call Trace: sched_show_task kernel/sched/core.c:5338 [inline] sched_show_task.cold+0x2e2/0x343 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+0xaf0/0xddc 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:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:97 Code: 48 c7 c7 20 2c 6e 87 4c 89 25 5c 23 06 0a 41 bc f4 ff ff ff e8 4a 1c eb ff 48 c7 05 46 23 06 0a 00 00 00 00 e9 24 ec ff ff 90 <48> 8b 34 24 65 48 8b 04 25 40 ee 01 00 65 8b 15 fc 54 9a 7e 81 e2 RSP: 0018:ffff8882124ef0c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8882124ef2a0 RBX: 0000000000000000 RCX: ffffffff81892c19 RDX: 0000000000000000 RSI: ffff8882124ef140 RDI: ffff8882124ef280 RBP: ffff8882124ef280 R08: ffff888091c44400 R09: ffffed1014bb78c5 R10: ffffed1014bb78c4 R11: ffff8880a5dbc627 R12: ffff8882124ef2a0 R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000000 flush_plug_callbacks block/blk-core.c:3654 [inline] blk_flush_plug_list+0x2e3/0x930 block/blk-core.c:3699 blk_finish_plug block/blk-core.c:3759 [inline] blk_finish_plug+0x50/0x97 block/blk-core.c:3755 shrink_node_memcg+0x9d3/0x14b0 mm/vmscan.c:2583 shrink_node+0x270/0x1350 mm/vmscan.c:2737 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: 0033:0x45c479 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:00007fcd0ec97c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: ffffffffffffffda RBX: 00007fcd0ec986d4 RCX: 000000000045c479 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000736 R14: 00000000004c9b76 R15: 000000000076bf2c rcu: rcu_preempt kthread starved for 10548 jiffies! g16729 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29616 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