Memory cgroup stats for /syz4: cache:6796KB rss:253140KB rss_huge:233472KB shmem:6864KB mapped_file:0KB dirty:0KB writeback:0KB swap:0KB inactive_anon:6920KB active_anon:253120KB inactive_file:0KB active_file:0KB unevictable:0KB Memory cgroup out of memory: Kill process 25660 (syz-executor4) score 1106 or sacrifice child Killed process 25660 (syz-executor4) total-vm:70472kB, anon-rss:2200kB, file-rss:33556kB, shmem-rss:0kB rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=107617, q=265) rcu: All QSes seen, last rcu_preempt kthread activity 10499 (4295030630-4295020131), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor4 R running task 11768 10807 6233 0x80000002 Call Trace: sched_show_task.cold.84+0x2b6/0x30a kernel/sched/core.c:5293 print_other_cpu_stall.cold.66+0x7dd/0x8bb kernel/rcu/tree.c:1286 check_cpu_stall kernel/rcu/tree.c:1415 [inline] rcu_pending kernel/rcu/tree.c:2961 [inline] rcu_check_callbacks+0xfd7/0x13f0 kernel/rcu/tree.c:2506 update_process_times+0x2d/0x70 kernel/time/timer.c:1636 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:lock_is_held_type+0x18b/0x210 kernel/locking/lockdep.c:3884 Code: ff df 41 c7 84 24 7c 08 00 00 00 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 75 63 48 83 3d 8c 29 f1 07 00 74 30 48 89 df 57 9d <0f> 1f 44 00 00 48 83 c4 08 44 89 e8 5b 41 5c 41 5d 5d c3 48 83 c4 RSP: 0018:ffff88817f83e148 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 0000000000000000 RDX: 1ffffffff12a401e RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff88817f83e168 R08: ffff8881c02a8640 R09: ffffed103b5e5b5f R10: ffffed103b5e5b5f R11: ffff8881daf2dafb R12: ffff8881c02a8640 R13: 0000000000000001 R14: ffff88818131e8c0 R15: ffff88817f83e590 lock_is_held include/linux/lockdep.h:339 [inline] rcu_read_lock_held+0xa9/0xc0 kernel/rcu/update.c:281 css_next_descendant_pre+0x102/0x190 kernel/cgroup/cgroup.c:3957 mem_cgroup_iter+0x42f/0x1160 mm/memcontrol.c:965 shrink_node+0x516/0x16b0 mm/vmscan.c:2781 shrink_zones mm/vmscan.c:2987 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3049 try_to_free_mem_cgroup_pages+0x4cf/0xcd0 mm/vmscan.c:3350 try_charge+0x521/0x1700 mm/memcontrol.c:2211 mem_cgroup_try_charge+0x627/0xe20 mm/memcontrol.c:5890 mem_cgroup_try_charge_delay+0x1d/0xa0 mm/memcontrol.c:5905 shmem_getpage_gfp+0x186b/0x4840 mm/shmem.c:1790 shmem_getpage mm/shmem.c:132 [inline] shmem_write_begin+0x10a/0x1e0 mm/shmem.c:2385 generic_perform_write+0x3aa/0x6a0 mm/filemap.c:3140 __generic_file_write_iter+0x26e/0x630 mm/filemap.c:3265 generic_file_write_iter+0x34d/0x6b0 mm/filemap.c:3293 call_write_iter include/linux/fs.h:1857 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_pwrite64+0x181/0x1b0 fs/read_write.c:652 __do_sys_pwrite64 fs/read_write.c:662 [inline] __se_sys_pwrite64 fs/read_write.c:659 [inline] __x64_sys_pwrite64+0x97/0xf0 fs/read_write.c:659 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4112f7 Code: 12 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 51 17 00 00 c3 48 83 ec 08 e8 27 fa ff ff 48 89 04 24 49 89 ca b8 12 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 6d fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f5bc2c5ea80 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 0000000020000310 RCX: 00000000004112f7 RDX: 0000000008100000 RSI: 0000000020000100 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000020000318 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005 R13: 0000000000000001 R14: 00000000004d9c08 R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 10499 jiffies! g107617 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 23000 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_timeout+0x140/0x260 kernel/time/timer.c:1804 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1934 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2090 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 sched: RT throttling activated