Backtrace

NMI watchdog: BUG: soft lockup - CPU#25 stuck for 22s! [sshd:194342]
Modules linked in: vfat fat uas usb_storage mpt3sas mpt2sas raid_class scsi_transport_sas mptctl mptbase ipmi_si dell_rbu tcp_diag inet_diag vhost_net vhost macvtap macvlan ebt_arp tun rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache bnx2i libiscsi bnx2fc cnic uio fcoe libfcoe libfc vport_geneve geneve ip6_udp_tunnel udp_tunnel ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack openvswitch ip_set nfnetlink ebtable_nat ebtable_broute 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 dcdbas iTCO_wdt iTCO_vendor_support sb_edac
edac_core intel_powerclamp coretemp intel_rapl iosf_mbi kvm_intel kvm irqbypass pcspkr sg mei_me mei lpc_ich shpchp ipmi_devintf ipmi_msghandler acpi_power_meter nfsd bridge bonding auth_rpcgss nfs_acl lockd grace ip_tables ext4 mbcache jbd2 dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio dm_service_time sd_mod crc_t10dif crct10dif_generic mxm_wmi qla2xxx scsi_transport_iscsi crct10dif_pclmul crct10dif_common crc32_pclmul crc32c_intel mgag200 ghash_clmulni_intel i2c_algo_bit aesni_intel drm_kms_helper 8021q lrw gf128mul garp glue_helper bnx2x stp ablk_helper llc syscopyarea cryptd mrp sysfillrect sysimgblt fb_sys_fops ttm dm_multipath drm scsi_transport_fc ahci tg3 libahci megaraid_sas libata scsi_tgt i2c_core ptp pps_core mdio libcrc32c wmi sunrpc dm_mirror dm_region_hash dm_log
dm_mod [last unloaded: ipmi_si]
CPU: 25 PID: 194342 Comm: sshd Not tainted 3.10.0-693.17.1.el7.x86_64 #1
Hardware name: Dell Inc. PowerEdge R630/02C2CP, BIOS 2.5.5 08/16/2017
task: ffff8835bf331fa0 ti: ffff8835b6f08000 task.ti: ffff8835b6f08000
RIP: 0010:[<ffffffff812c4b65>]  [<ffffffff812c4b65>] sidtab_context_to_sid+0xa5/0x480
RSP: 0018:ffff8835b6f0bcf8  EFLAGS: 00000297
RAX: 0000000700000007 RBX: ffff8835b6f0bc80 RCX: 0000000000000000
RDX: ffff8835b6f0bda0 RSI: 0000000000000000 RDI: ffffffff81fd7b00
RBP: ffff8835b6f0bd40 R08: ffff8835b6f0bdb8 R09: 0000000000000300
R10: ffffffffffffffff R11: ffffffffffffffff R12: ffff8835b6f0bc80
R13: ffffffff811e19f6 R14: 00000000d46d5876 R15: ffffffff8118e39a
FS:  00007f55004858c0(0000) GS:ffff883ffe100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54ff8511d0 CR3: 00000034fb394000 CR4: 00000000003627e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
[<ffffffff812d16e5>] ? mls_setup_user_range+0x145/0x250
[<ffffffff812cde67>] security_get_user_sids+0x3f7/0x550
[<ffffffff812c245b>] sel_write_user+0x12b/0x210
[<ffffffff81189536>] ? get_zeroed_page+0x16/0x20
[<ffffffff812c2330>] ? sel_write_member+0x200/0x200
[<ffffffff812c0b98>] selinux_transaction_write+0x48/0x80
[<ffffffff81202ced>] vfs_write+0xbd/0x1e0
[<ffffffff81213d7d>] ? putname+0x3d/0x60
[<ffffffff81203aff>] SyS_write+0x7f/0xe0
[<ffffffff816b89fd>] system_call_fastpath+0x16/0x1b
Code: 24 38 4d 85 e4 75 2d e9 ca 02 00 00 66 2e 0f 1f 84 00 00 00 00 00 41 8b 50 0c 85 d2 74 08 39 d0 0f 84 80 02 00 00 4d 8b 64 24 50 <4d> 85 e4 0f 84 a2 02 00 00 41 8b 44 24 14 85 c0 75 d9 41 8b 48