rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4503/1:b..l P8877/1:b..l
(detected by 0, t=10502 jiffies, g=37229, q=441)
task:syz.9.1209 state:R running task stack:23992 pid: 8877 ppid: 7879 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:667
RIP: 0010:debug_lockdep_rcu_enabled+0x25/0x30 kernel/rcu/update.c:281
Code: cc cc cc cc cc 31 c0 83 3d 3b b5 cb 03 00 74 1d 83 3d c2 e7 cb 03 00 74 14 65 48 8b 0d 24 cb c3 75 31 c0 83 b9 ec 0a 00 00 00 <0f> 94 c0 c3 cc cc cc cc cc cc cc 41 56 53 89 fb e8 d6 0d 00 00 41
RSP: 0018:ffffc90003e9f2a8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88805da4c010 RCX: ffff8880272f1dc0
RDX: dffffc0000000000 RSI: ffffffff8af9ece0 RDI: ffffffff8af9eca0
RBP: ffff88805da4c054 R08: dffffc0000000000 R09: fffffbfff2131021
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffea000142e1c0 R14: 0000000000000000 R15: ffffea000142e1c0
rcu_read_unlock include/linux/rcupdate.h:768 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:324 [inline]
percpu_ref_put+0x89/0x150 include/linux/percpu-refcount.h:338
css_put include/linux/cgroup.h:405 [inline]
__mem_cgroup_charge+0x55/0x80 mm/memcontrol.c:6799
mem_cgroup_charge include/linux/memcontrol.h:700 [inline]
shmem_add_to_page_cache+0xc22/0x17c0 mm/shmem.c:718
shmem_getpage_gfp+0x1aa1/0x3190 mm/shmem.c:1942
shmem_fault+0x1d7/0x700 mm/shmem.c:2120
__do_fault+0x139/0x340 mm/memory.c:3926
do_read_fault mm/memory.c:4262 [inline]
do_fault mm/memory.c:4390 [inline]
handle_pte_fault mm/memory.c:4648 [inline]
__handle_mm_fault mm/memory.c:4783 [inline]
handle_mm_fault+0x376f/0x5960 mm/memory.c:4881
faultin_page mm/gup.c:976 [inline]
__get_user_pages+0x4ed/0x11d0 mm/gup.c:1197
populate_vma_page_range+0x215/0x2a0 mm/gup.c:1529
__mm_populate+0x2a5/0x4a0 mm/gup.c:1638
mm_populate include/linux/mm.h:2632 [inline]
vm_mmap_pgoff+0x22b/0x2d0 mm/util.c:556
ksys_mmap_pgoff+0x13e/0x780 mm/mmap.c:1624
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8f2605ad19
RSP: 002b:00007f8f23eaa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f8f2624b080 RCX: 00007f8f2605ad19
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f8f260d6a20 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8f2624b080 R15: 00007ffe432917c8
task:kworker/u4:11 state:R running task stack:21816 pid: 4503 ppid: 2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:lock_acquire+0x252/0x4f0 kernel/locking/lockdep.c:5627
Code: 2b 00 74 08 4c 89 f7 e8 fc 8c 67 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000145f8c0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200028bf24 RCX: 1ffff9200028bec4
RDX: dffffc0000000000 RSI: ffffffff8aab3d20 RDI: ffffffff8af9ed00
RBP: ffffc9000145fa20 R08: dffffc0000000000 R09: fffffbfff2131021
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200028bf20
R13: dffffc0000000000 R14: ffffc9000145f920 R15: 0000000000000246
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
rcu_read_lock include/linux/rcupdate.h:739 [inline]
inet_twsk_purge+0x129/0x9d0 net/ipv4/inet_timewait_sock.c:268
tcp_sk_exit_batch+0x28/0x90 net/ipv4/tcp_ipv4.c:3234
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x763/0xb60 net/core/net_namespace.c:599
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: rcu_preempt kthread starved for 9676 jiffies! g37229 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I stack:27064 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:681
RIP: 0010:schedule_timeout+0x1/0x300 kernel/time/timer.c:1876
Code: d2 ab 8a be e2 0a 00 00 31 d2 e8 da 4a 11 f7 e9 d5 8d 58 f7 e8 00 85 38 f7 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 00 00
RSP: 0018:ffffc90000d47c90 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc90000d47d68 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8aab2a80 RDI: 0000000000000001
RBP: ffffc90000d47df0 R08: ffffffff8186f220 R09: fffffbfff196480d
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffffc90000d47d60 R14: 0000000000000000 R15: 0000000000000000
rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:108 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:562