HDD related tasks hangs after mount.cifs and smb timeout

Mount remote smb server as following:

sudo mount -t cifs //xxx.xxx.xxx.xxx/Shared /media/MOUNTPOINT -ousername=USERNAME,domain=DOMAINNAME

After a while list /media or doing anything related to mount points, like... df -h hangs and populates dmesg with following:

[19695.045113] ls D 0 15379 1 0x00000004
[19695.045118] Call Trace:
[19695.045131] __schedule+0x232/0x700
[19695.045136] schedule+0x36/0x80
[19695.045140] schedule_preempt_disabled+0xe/0x10
[19695.045145] __mutex_lock_slowpath+0x193/0x290
[19695.045152] mutex_lock+0x2f/0x40
[19695.045201] cifs_reconnect_tcon+0x95/0x340 [cifs]
[19695.045211] ? __find_get_block+0x22c/0x260
[19695.045218] ? __check_block_validity.constprop.75+0x31/0x70
[19695.045245] smb_init+0x2a/0x50 [cifs]
[19695.045273] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[19695.045310] cifs_query_path_info+0x6f/0x1a0 [cifs]
[19695.045317] ? lookup_fast+0xe3/0x2f0
[19695.045325] ? kmem_cache_alloc_trace+0x152/0x1c0
[19695.045359] cifs_get_inode_info+0x4a3/0x970 [cifs]
[19695.045363] ? unlazy_walk+0xf8/0x180
[19695.045368] ? __kmalloc+0x178/0x200
[19695.045399] ? build_path_from_dentry+0xe2/0x3e0 [cifs]
[19695.045429] ? build_path_from_dentry+0xe2/0x3e0 [cifs]
[19695.045463] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[19695.045497] cifs_getattr+0x51/0x110 [cifs]
[19695.045503] vfs_getattr_nosec+0x29/0x40
[19695.045508] vfs_getattr+0x26/0x30
[19695.045513] vfs_fstatat+0x78/0xc0
[19695.045518] SYSC_newlstat+0x31/0x60
[19695.045524] SyS_newlstat+0xe/0x10
[19695.045529] entry_SYSCALL_64_fastpath+0x1e/0xad
[19695.045532] RIP: 0033:0x7fda16c63c55
[19695.045535] RSP: 002b:00007ffe10f434f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
[19695.045538] RAX: ffffffffffffffda RBX: 00007fda16f31b20 RCX: 00007fda16c63c55
[19695.045540] RDX: 0000000000f61d60 RSI: 0000000000f61d60 RDI: 00007ffe10f43500
[19695.045542] RBP: 0000000000008041 R08: 0000000000000000 R09: 00000000000003c0
[19695.045544] R10: 00000000000001cc R11: 0000000000000246 R12: 00007fda16f31b78
[19695.045546] R13: 00007fda16f31b78 R14: 0000000000002710 R15: 0000000000404ad0

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: cifs-utils 2:6.4-1ubuntu1.1
ProcVersionSignature: Ubuntu 4.10.0-42.46~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-42-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Thu Jan 4 15:13:42 2018
InstallationDate: Installed on 2017-08-16 (141 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
SourcePackage: cifs-utils
UpgradeStatus: No upgrade log present (probably fresh install)