rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (1 GPs behind) idle=f5e/1/0x4000000000000002 softirq=158483/158484 fqs=0
(t=10500 jiffies g=256329 q=115)
rcu: rcu_preempt kthread starved for 10500 jiffies! g256329 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt R running task 29040 10 2 0x80004000
Call Trace:
context_switch kernel/sched/core.c:3384 [inline]
__schedule+0x828/0x1c20 kernel/sched/core.c:4065
schedule+0xd9/0x260 kernel/sched/core.c:4132
schedule_timeout+0x486/0xc50 kernel/time/timer.c:1895
rcu_gp_fqs_loop kernel/rcu/tree.c:1639 [inline]
rcu_gp_kthread+0x9b2/0x18d0 kernel/rcu/tree.c:1799
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 1
CPU: 1 PID: 14955 Comm: syz-executor.3 Not tainted 5.3.0+ #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+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x23b/0x28b 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_stall.h:254
print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
rcu_pending kernel/rcu/tree.c:2795 [inline]
rcu_sched_clock_irq.cold+0x4fd/0xc12 kernel/rcu/tree.c:2244
update_process_times+0x2d/0x70 kernel/time/timer.c:1726
tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1299
__run_hrtimer kernel/time/hrtimer.c:1514 [inline]
__hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1576
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1638
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline]
RIP: 0010:lock_acquire+0x20b/0x410 kernel/locking/lockdep.c:4490
Code: 94 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 d3 01 00 00 48 83 3d 71 e0 99 07 00 0f 84 53 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b
RSP: 0018:ffff88803a3e6eb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11e6384 RBX: ffff8880a8ae6140 RCX: ffffffff8158e0c0
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000286
RBP: ffff88803a3e6ef8 R08: 1ffffffff14ed92c R09: fffffbfff14ed92d
R10: ffff8880a8ae6a00 R11: ffff8880a8ae6140 R12: ffffffff88faacc0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002
rcu_lock_acquire include/linux/rcupdate.h:208 [inline]
rcu_read_lock include/linux/rcupdate.h:599 [inline]
mem_cgroup_iter+0x1bb/0xaf0 mm/memcontrol.c:1049
shrink_node+0x1aa/0x14b0 mm/vmscan.c:2718
shrink_zones mm/vmscan.c:2967 [inline]
do_try_to_free_pages+0x3cb/0x11f0 mm/vmscan.c:3025
try_to_free_mem_cgroup_pages+0x314/0xa80 mm/vmscan.c:3325
try_charge+0x602/0x1440 mm/memcontrol.c:2558
mem_cgroup_try_charge+0x136/0x590 mm/memcontrol.c:6493
mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:6508
wp_page_copy+0x404/0x1860 mm/memory.c:2333
do_wp_page+0x543/0x15c0 mm/memory.c:2628
handle_pte_fault mm/memory.c:3865 [inline]
__handle_mm_fault+0x23e6/0x4040 mm/memory.c:3973
handle_mm_fault+0x3b7/0xaa0 mm/memory.c:4010
do_user_addr_fault arch/x86/mm/fault.c:1441 [inline]
__do_page_fault+0x536/0xdd0 arch/x86/mm/fault.c:1506
do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1530
page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1202
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x30 arch/x86/lib/copy_user_64.S:205
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4
RSP: 0018:ffff88803a3e7ab8 EFLAGS: 00010206
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 00000000000000c0
RDX: 0000000000001000 RSI: ffff888095e2ef40 RDI: 000000002004d000
RBP: ffff88803a3e7af0 R08: ffffed1012bc5e00 R09: 0000000000000000
R10: ffffed1012bc5dff R11: ffff888095e2efff R12: 000000002004c0c0
R13: ffff888095e2e000 R14: 000000002004d0c0 R15: 00007ffffffff000
copy_to_user include/linux/uaccess.h:152 [inline]
mem_rw.isra.0+0x363/0x4f0 fs/proc/base.c:853
mem_read+0x52/0x70 fs/proc/base.c:874
do_loop_readv_writev fs/read_write.c:714 [inline]
do_loop_readv_writev fs/read_write.c:701 [inline]
do_iter_read+0x4a4/0x660 fs/read_write.c:935
vfs_readv+0xf0/0x160 fs/read_write.c:997
do_preadv+0x1c4/0x280 fs/read_write.c:1089
__do_sys_preadv fs/read_write.c:1139 [inline]
__se_sys_preadv fs/read_write.c:1134 [inline]
__x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1134
do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459a29
Code: fd 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f73b366dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000459a29
RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000005
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 000000002000107c R11: 0000000000000246 R12: 00007f73b366e6d4
R13: 00000000004c6d4f R14: 00000000004dc108 R15: 00000000ffffffff
sched: RT throttling activated