Bug. XOA crash when adding IO counters in htop

Forza

Everytime I add IO counters in htop on XOA, it stalls and crashes. It also caused a VM being backuped to reboot.

XOA build: unknown - Current version: 5.43.2 
- node: 8.16.2+4
- npm: 4.6.1
- xo-server: 5.56.2
- xo-server-auth-github-enterprise: 0.2.1
- xo-server-auth-google-enterprise: 0.2.1
- xo-server-auth-ldap-enterprise: 0.6.6
- xo-server-auth-saml-enterprise: 0.7.1
- xo-server-backup-reports-enterprise: 0.16.4
- xo-server-telemetry: 0.2.0
- xo-server-transport-email-enterprise: 0.5.0
- xo-server-transport-icinga2-enterprise: 0.1.0
- xo-server-transport-nagios-enterprise: 0.1.0
- xo-server-transport-slack-enterprise: 0.0.0
- xo-server-transport-xmpp-enterprise: 0.1.1
- xo-server-usage-report-enterprise: 0.7.3
- xo-server-xoa: 0.5.0
- xo-web-enterprise: 5.56.2
- xoa-cli: 0.18.2
- xoa-updater: 0.25.0

Linux xoa 4.9.0-8-amd64 #1 SMP Debian 4.9.130-2 (2018-10-27) x86_64 GNU/Linux

Feb 20 09:28:25 xoa kernel: [ 2055.132199] node            D    0  2844    556 0x00000002
Feb 20 09:28:25 xoa kernel: [ 2055.132203]  ffff95c378b02100 0000000000000000 ffff95c374a7d000 ffff95c379ed8980
Feb 20 09:28:25 xoa kernel: [ 2055.132205]  ffff95c373968000 ffffb28a03acfa30 ffffffffb1214219 ffff95c2c593a118
Feb 20 09:28:25 xoa kernel: [ 2055.132207]  00ffffffc05c66da ffff95c379ed8980 ffff95c373c34400 ffff95c374a7d000
Feb 20 09:28:25 xoa kernel: [ 2055.132210] Call Trace:
Feb 20 09:28:25 xoa kernel: [ 2055.132217]  [<ffffffffb1214219>] ? __schedule+0x239/0x6f0
Feb 20 09:28:25 xoa kernel: [ 2055.132219]  [<ffffffffb1214ec0>] ? bit_wait+0x50/0x50
Feb 20 09:28:25 xoa kernel: [ 2055.132221]  [<ffffffffb1214702>] ? schedule+0x32/0x80
Feb 20 09:28:25 xoa kernel: [ 2055.132223]  [<ffffffffb1217a8d>] ? schedule_timeout+0x1dd/0x380
Feb 20 09:28:25 xoa kernel: [ 2055.132225]  [<ffffffffb0c1be01>] ? xen_clocksource_get_cycles+0x11/0x20
Feb 20 09:28:25 xoa kernel: [ 2055.132227]  [<ffffffffb1214ec0>] ? bit_wait+0x50/0x50
Feb 20 09:28:25 xoa kernel: [ 2055.132229]  [<ffffffffb1213f7d>] ? io_schedule_timeout+0x9d/0x100
Feb 20 09:28:25 xoa kernel: [ 2055.132231]  [<ffffffffb0cbce47>] ? prepare_to_wait+0x57/0x80
Feb 20 09:28:25 xoa kernel: [ 2055.132233]  [<ffffffffb1214ed7>] ? bit_wait_io+0x17/0x60
Feb 20 09:28:25 xoa kernel: [ 2055.132235]  [<ffffffffb1214a95>] ? __wait_on_bit+0x55/0x80
Feb 20 09:28:25 xoa kernel: [ 2055.132238]  [<ffffffffb0d82598>] ? find_get_pages_tag+0x158/0x2e0
Feb 20 09:28:25 xoa kernel: [ 2055.132240]  [<ffffffffb0d817ff>] ? wait_on_page_bit+0x7f/0xa0
Feb 20 09:28:25 xoa kernel: [ 2055.132242]  [<ffffffffb0cbd2b0>] ? wake_atomic_t_function+0x60/0x60
Feb 20 09:28:25 xoa kernel: [ 2055.132244]  [<ffffffffb0d81900>] ? __filemap_fdatawait_range+0xe0/0x140
Feb 20 09:28:25 xoa kernel: [ 2055.132246]  [<ffffffffb0d8196f>] ? filemap_fdatawait_range+0xf/0x30
Feb 20 09:28:25 xoa kernel: [ 2055.132248]  [<ffffffffb0d843b9>] ? filemap_write_and_wait_range+0x49/0x70
Feb 20 09:28:25 xoa kernel: [ 2055.132264]  [<ffffffffc08602b2>] ? nfs_file_fsync+0x32/0x1e0 [nfs]
Feb 20 09:28:25 xoa kernel: [ 2055.132267]  [<ffffffffb0e07a1d>] ? filp_close+0x2d/0x70
Feb 20 09:28:25 xoa kernel: [ 2055.132270]  [<ffffffffb0e2ac35>] ? do_close_on_exec+0xc5/0x110
Feb 20 09:28:25 xoa kernel: [ 2055.132272]  [<ffffffffb0e1259b>] ? flush_old_exec+0x5db/0x6b0
Feb 20 09:28:25 xoa kernel: [ 2055.132275]  [<ffffffffb0e67be2>] ? load_elf_binary+0x3c2/0x1640
Feb 20 09:28:25 xoa kernel: [ 2055.132277]  [<ffffffffb0e06f7a>] ? __check_object_size+0xfa/0x1d8
Feb 20 09:28:25 xoa kernel: [ 2055.132278]  [<ffffffffb0e11c85>] ? copy_strings.isra.25+0x185/0x480
Feb 20 09:28:25 xoa kernel: [ 2055.132280]  [<ffffffffb0e11766>] ? search_binary_handler+0xa6/0x1c0
Feb 20 09:28:25 xoa kernel: [ 2055.132282]  [<ffffffffb0e12eaa>] ? do_execveat_common.isra.37+0x5aa/0x790
Feb 20 09:28:25 xoa kernel: [ 2055.132284]  [<ffffffffb0e132b5>] ? SyS_execve+0x35/0x40
Feb 20 09:28:25 xoa kernel: [ 2055.132286]  [<ffffffffb0c03b7d>] ? do_syscall_64+0x8d/0xf0
Feb 20 09:28:25 xoa kernel: [ 2055.132288]  [<ffffffffb1218f8e>] ? entry_SYSCALL_64_after_swapgs+0x58/0xc6

What's more, the backups are listed as ongoing after a force-reboot of xoa, though I do not think they are actually running as there is no network or disk I/O.

Forza

A toolstack restart cleared the ongoing-but-failed tasks.