WARNING: CPU: 0 PID: 3545 at drivers/hv/hv_balloon.c:1226 balloon_up+0x3df/0x4f0 [hv_balloon]
Modules linked in: tcp_lp fuse xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter hv_utils iosf_mbi crc32_pclmul ptp ghash_clmulni_intel sg aesni_intel lrw gf128mul glue_helper ablk_helper cryptd pps_core hv_balloon joydev i2c_piix4 pcspkr i2c_core nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sr_mod cdrom sd_mod crc_t10dif crct10dif_generic
ata_generic pata_acpi hv_netvsc hv_storvsc scsi_transport_fc hid_hyperv hyperv_keyboard scsi_tgt crct10dif_pclmul crct10dif_common ata_piix crc32c_intel libata floppy hyperv_fb serio_raw hv_vmbus dm_mirror dm_region_hash dm_log dm_mod
CPU: 0 PID: 3545 Comm: kworker/0:0 Not tainted 3.10.0-693.17.1.el7.x86_64 #1
Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090007  06/02/2017
Workqueue: events balloon_up [hv_balloon]
Call Trace:
[<ffffffff816a6071>] dump_stack+0x19/0x1b
[<ffffffff810895e8>] __warn+0xd8/0x100
[<ffffffff8108972d>] warn_slowpath_null+0x1d/0x20
[<ffffffffc03881cf>] balloon_up+0x3df/0x4f0 [hv_balloon]
[<ffffffff810aa59a>] process_one_work+0x17a/0x440
[<ffffffff810ab266>] worker_thread+0x126/0x3c0
[<ffffffff810ab140>] ? manage_workers.isra.24+0x2a0/0x2a0
[<ffffffff810b270f>] kthread+0xcf/0xe0
[<ffffffff810b2640>] ? insert_kthread_work+0x40/0x40
[<ffffffff816b8798>] ret_from_fork+0x58/0x90
[<ffffffff810b2640>] ? insert_kthread_work+0x40/0x40