[79557.300029] INFO: task sftp-server:7877 blocked for more than 120 seconds.
[79557.300197]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79557.300328] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79557.300464] sftp-server     D ffff8800b8dcf9e8     0  7877      1 0x00000000
[79557.300468]  ffff8800b8dcf9e8 ffffffff812222ac ffff8801b8281900 ffff8800bad4b200
[79557.300470]  ffff8800b8dd0000 ffff8801b3284824 ffff8800bad4b200 00000000ffffffff
[79557.300472]  ffff8801b3284828 ffff8800b8dcfa00 ffffffff81829a25 ffff8801b3284820
[79557.300474] Call Trace:
[79557.300481]  [<ffffffff812222ac>] ? do_select+0x77c/0x810
[79557.300485]  [<ffffffff81829a25>] schedule+0x35/0x80
[79557.300488]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79557.300490]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79557.300507]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79557.300562]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79557.300565]  [<ffffffff81224ebd>] ? __d_instantiate+0x2d/0xf0
[79557.300577]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79557.300588]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79557.300602]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79557.300605]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79557.300608]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79557.300610]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79557.300623]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79557.300625]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79557.300627]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79557.300639]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79557.300651]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79557.300665]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79557.300667]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79557.300680]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79557.300682]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79557.300684]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79557.300686]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79557.300687]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79557.300690]  [<ffffffff8109ec24>] ? task_work_run+0x84/0xa0
[79557.300693]  [<ffffffff81003226>] ? exit_to_usermode_loop+0xa6/0xd0
[79557.300695]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79557.300697]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71
[79557.300700] INFO: task ls:7946 blocked for more than 120 seconds.
[79557.300830]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79557.300952] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79557.301085] ls              D ffff8800ba28f9e8     0  7946      1 0x00000004
[79557.301087]  ffff8800ba28f9e8 0000000000000000 ffffffff81e11500 ffff88010755d780
[79557.301089]  ffff8800ba290000 ffff8801b3284824 ffff88010755d780 00000000ffffffff
[79557.301091]  ffff8801b3284828 ffff8800ba28fa00 ffffffff81829a25 ffff8801b3284820
[79557.301093] Call Trace:
[79557.301096]  [<ffffffff81829a25>] schedule+0x35/0x80
[79557.301098]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79557.301100]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79557.301102]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79557.301114]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79557.301116]  [<ffffffff811eb299>] ? ___slab_alloc+0x1e9/0x460
[79557.301127]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79557.301138]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79557.301152]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79557.301155]  [<ffffffff812bfaa0>] ? ext4_encrypted_follow_link+0x230/0x230
[79557.301157]  [<ffffffff811ecef8>] ? __kmalloc+0x208/0x250
[79557.301159]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79557.301161]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79557.301174]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79557.301176]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79557.301178]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79557.301190]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79557.301202]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79557.301216]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79557.301218]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79557.301231]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79557.301233]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79557.301235]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79557.301236]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79557.301238]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79557.301240]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79557.301242]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71
[79677.295161] INFO: task sftp-server:7877 blocked for more than 120 seconds.
[79677.295229]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79677.295358] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79677.295503] sftp-server     D ffff8800b8dcf9e8     0  7877      1 0x00000000
[79677.295507]  ffff8800b8dcf9e8 ffffffff812222ac ffff8801b8281900 ffff8800bad4b200
[79677.295509]  ffff8800b8dd0000 ffff8801b3284824 ffff8800bad4b200 00000000ffffffff
[79677.295511]  ffff8801b3284828 ffff8800b8dcfa00 ffffffff81829a25 ffff8801b3284820
[79677.295513] Call Trace:
[79677.295520]  [<ffffffff812222ac>] ? do_select+0x77c/0x810
[79677.295525]  [<ffffffff81829a25>] schedule+0x35/0x80
[79677.295527]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79677.295529]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79677.295532]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79677.295555]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79677.295558]  [<ffffffff81224ebd>] ? __d_instantiate+0x2d/0xf0
[79677.295569]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79677.295580]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79677.295594]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79677.295597]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79677.295600]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79677.295602]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79677.295615]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79677.295617]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79677.295619]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79677.295631]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79677.295644]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79677.295657]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79677.295659]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79677.295673]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79677.295675]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79677.295676]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79677.295678]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79677.295680]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79677.295683]  [<ffffffff8109ec24>] ? task_work_run+0x84/0xa0
[79677.295686]  [<ffffffff81003226>] ? exit_to_usermode_loop+0xa6/0xd0
[79677.295687]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79677.295689]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71
[79677.295692] INFO: task ls:7946 blocked for more than 120 seconds.
[79677.295822]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79677.295945] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79677.296082] ls              D ffff8800ba28f9e8     0  7946      1 0x00000004
[79677.296085]  ffff8800ba28f9e8 0000000000000000 ffffffff81e11500 ffff88010755d780
[79677.296087]  ffff8800ba290000 ffff8801b3284824 ffff88010755d780 00000000ffffffff
[79677.296089]  ffff8801b3284828 ffff8800ba28fa00 ffffffff81829a25 ffff8801b3284820
[79677.296091] Call Trace:
[79677.296094]  [<ffffffff81829a25>] schedule+0x35/0x80
[79677.296096]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79677.296098]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79677.296100]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79677.296112]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79677.296114]  [<ffffffff811eb299>] ? ___slab_alloc+0x1e9/0x460
[79677.296125]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79677.296136]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79677.296150]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79677.296153]  [<ffffffff812bfaa0>] ? ext4_encrypted_follow_link+0x230/0x230
[79677.296155]  [<ffffffff811ecef8>] ? __kmalloc+0x208/0x250
[79677.296157]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79677.296159]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79677.296173]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79677.296175]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79677.296177]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79677.296189]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79677.296201]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79677.296214]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79677.296216]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79677.296230]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79677.296232]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79677.296233]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79677.296235]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79677.296237]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79677.296239]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79677.296240]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71
[79677.296243] INFO: task ls:8057 blocked for more than 120 seconds.
[79677.296371]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79677.296495] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79677.296630] ls              D ffff8801b72ab9e8     0  8057      1 0x00000004
[79677.296632]  ffff8801b72ab9e8 0000000000000000 ffffffff81e11500 ffff8801b6cf5780
[79677.296634]  ffff8801b72ac000 ffff8801b3284824 ffff8801b6cf5780 00000000ffffffff
[79677.296636]  ffff8801b3284828 ffff8801b72aba00 ffffffff81829a25 ffff8801b3284820
[79677.296638] Call Trace:
[79677.296641]  [<ffffffff81829a25>] schedule+0x35/0x80
[79677.296643]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79677.296645]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79677.296647]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79677.296659]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79677.296669]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79677.296681]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79677.296695]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79677.296697]  [<ffffffff812bfaa0>] ? ext4_encrypted_follow_link+0x230/0x230
[79677.296699]  [<ffffffff811ecef8>] ? __kmalloc+0x208/0x250
[79677.296701]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79677.296703]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79677.296717]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79677.296719]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79677.296721]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79677.296733]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79677.296745]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79677.296759]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79677.296761]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79677.296774]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79677.296776]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79677.296778]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79677.296779]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79677.296781]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79677.296783]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79677.296785]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71
[79797.290340] INFO: task sftp-server:7877 blocked for more than 120 seconds.
[79797.290647]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79797.290902] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79797.291045] sftp-server     D ffff8800b8dcf9e8     0  7877      1 0x00000000
[79797.291049]  ffff8800b8dcf9e8 ffffffff812222ac ffff8801b8281900 ffff8800bad4b200
[79797.291051]  ffff8800b8dd0000 ffff8801b3284824 ffff8800bad4b200 00000000ffffffff
[79797.291053]  ffff8801b3284828 ffff8800b8dcfa00 ffffffff81829a25 ffff8801b3284820
[79797.291055] Call Trace:
[79797.291084]  [<ffffffff812222ac>] ? do_select+0x77c/0x810
[79797.291102]  [<ffffffff81829a25>] schedule+0x35/0x80
[79797.291105]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79797.291107]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79797.291114]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79797.291141]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79797.291144]  [<ffffffff81224ebd>] ? __d_instantiate+0x2d/0xf0
[79797.291155]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79797.291166]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79797.291180]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79797.291188]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79797.291196]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79797.291198]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79797.291212]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79797.291215]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79797.291217]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79797.291229]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79797.291241]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79797.291255]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79797.291257]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79797.291270]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79797.291273]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79797.291274]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79797.291276]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79797.291278]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79797.291291]  [<ffffffff8109ec24>] ? task_work_run+0x84/0xa0
[79797.291303]  [<ffffffff81003226>] ? exit_to_usermode_loop+0xa6/0xd0
[79797.291305]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79797.291307]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71
[79797.291310] INFO: task ls:7946 blocked for more than 120 seconds.
[79797.291441]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79797.291565] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79797.291705] ls              D ffff8800ba28f9e8     0  7946      1 0x00000004
[79797.291708]  ffff8800ba28f9e8 0000000000000000 ffffffff81e11500 ffff88010755d780
[79797.291710]  ffff8800ba290000 ffff8801b3284824 ffff88010755d780 00000000ffffffff
[79797.291711]  ffff8801b3284828 ffff8800ba28fa00 ffffffff81829a25 ffff8801b3284820
[79797.291713] Call Trace:
[79797.291717]  [<ffffffff81829a25>] schedule+0x35/0x80
[79797.291719]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79797.291721]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79797.291723]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79797.291734]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79797.291737]  [<ffffffff811eb299>] ? ___slab_alloc+0x1e9/0x460
[79797.291747]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79797.291759]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79797.291773]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79797.291787]  [<ffffffff812bfaa0>] ? ext4_encrypted_follow_link+0x230/0x230
[79797.291790]  [<ffffffff811ecef8>] ? __kmalloc+0x208/0x250
[79797.291792]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79797.291794]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79797.291808]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79797.291810]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79797.291812]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79797.291824]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79797.291836]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79797.291850]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79797.291852]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79797.291866]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79797.291868]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79797.291869]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79797.291871]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79797.291873]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79797.291875]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79797.291877]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71
[79797.291879] INFO: task ls:8057 blocked for more than 120 seconds.
[79797.292010]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79797.292138] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79797.292268] ls              D ffff8801b72ab9e8     0  8057      1 0x00000004
[79797.292271]  ffff8801b72ab9e8 0000000000000000 ffffffff81e11500 ffff8801b6cf5780
[79797.292273]  ffff8801b72ac000 ffff8801b3284824 ffff8801b6cf5780 00000000ffffffff
[79797.292274]  ffff8801b3284828 ffff8801b72aba00 ffffffff81829a25 ffff8801b3284820
[79797.292276] Call Trace:
[79797.292279]  [<ffffffff81829a25>] schedule+0x35/0x80
[79797.292281]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79797.292283]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79797.292285]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79797.292297]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79797.292308]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79797.292319]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79797.292333]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79797.292336]  [<ffffffff812bfaa0>] ? ext4_encrypted_follow_link+0x230/0x230
[79797.292338]  [<ffffffff811ecef8>] ? __kmalloc+0x208/0x250
[79797.292340]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79797.292342]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79797.292355]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79797.292358]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79797.292359]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79797.292372]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79797.292384]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79797.292397]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79797.292400]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79797.292413]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79797.292415]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79797.292417]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79797.292418]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79797.292420]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79797.292422]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79797.292424]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71
[79917.285664] INFO: task sftp-server:7877 blocked for more than 120 seconds.
[79917.286102]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79917.286274] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79917.286410] sftp-server     D ffff8800b8dcf9e8     0  7877      1 0x00000000
[79917.286414]  ffff8800b8dcf9e8 ffffffff812222ac ffff8801b8281900 ffff8800bad4b200
[79917.286416]  ffff8800b8dd0000 ffff8801b3284824 ffff8800bad4b200 00000000ffffffff
[79917.286418]  ffff8801b3284828 ffff8800b8dcfa00 ffffffff81829a25 ffff8801b3284820
[79917.286420] Call Trace:
[79917.286428]  [<ffffffff812222ac>] ? do_select+0x77c/0x810
[79917.286433]  [<ffffffff81829a25>] schedule+0x35/0x80
[79917.286435]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79917.286437]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79917.286441]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79917.286463]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79917.286466]  [<ffffffff81224ebd>] ? __d_instantiate+0x2d/0xf0
[79917.286476]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79917.286488]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79917.286502]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79917.286505]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79917.286508]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79917.286510]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79917.286523]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79917.286525]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79917.286528]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79917.286540]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79917.286552]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79917.286565]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79917.286567]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79917.286581]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79917.286583]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79917.286585]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79917.286586]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79917.286588]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79917.286591]  [<ffffffff8109ec24>] ? task_work_run+0x84/0xa0
[79917.286594]  [<ffffffff81003226>] ? exit_to_usermode_loop+0xa6/0xd0
[79917.286596]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79917.286604]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71
[79917.286607] INFO: task ls:7946 blocked for more than 120 seconds.
[79917.286737]       Not tainted 4.4.0-31-generic #50-Ubuntu
[79917.286861] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[79917.287532] ls              D ffff8800ba28f9e8     0  7946      1 0x00000004
[79917.287535]  ffff8800ba28f9e8 0000000000000000 ffffffff81e11500 ffff88010755d780
[79917.287537]  ffff8800ba290000 ffff8801b3284824 ffff88010755d780 00000000ffffffff
[79917.287539]  ffff8801b3284828 ffff8800ba28fa00 ffffffff81829a25 ffff8801b3284820
[79917.287541] Call Trace:
[79917.287544]  [<ffffffff81829a25>] schedule+0x35/0x80
[79917.287547]  [<ffffffff81829cce>] schedule_preempt_disabled+0xe/0x10
[79917.287548]  [<ffffffff8182b909>] __mutex_lock_slowpath+0xb9/0x130
[79917.287550]  [<ffffffff8182b99f>] mutex_lock+0x1f/0x30
[79917.287562]  [<ffffffffc04756cd>] cifs_reconnect_tcon+0x9d/0x340 [cifs]
[79917.287565]  [<ffffffff811eb299>] ? ___slab_alloc+0x1e9/0x460
[79917.287575]  [<ffffffffc0475a1a>] smb_init+0x2a/0x50 [cifs]
[79917.287587]  [<ffffffffc047cc13>] CIFSSMBQPathInfo+0x63/0x2e0 [cifs]
[79917.287601]  [<ffffffffc04a7c3f>] cifs_query_path_info+0x6f/0x1a0 [cifs]
[79917.287604]  [<ffffffff812bfaa0>] ? ext4_encrypted_follow_link+0x230/0x230
[79917.287606]  [<ffffffff811ecef8>] ? __kmalloc+0x208/0x250
[79917.287608]  [<ffffffff811eb813>] ? kmem_cache_alloc_trace+0x183/0x1f0
[79917.287610]  [<ffffffff81218224>] ? lookup_fast+0x184/0x330
[79917.287623]  [<ffffffffc0496a60>] cifs_get_inode_info+0x390/0x8f0 [cifs]
[79917.287626]  [<ffffffff81218011>] ? unlazy_walk+0xc1/0x150
[79917.287628]  [<ffffffff811ecea9>] ? __kmalloc+0x1b9/0x250
[79917.287640]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79917.287652]  [<ffffffffc0489ba1>] ? build_path_from_dentry+0xb1/0x2d0 [cifs]
[79917.287665]  [<ffffffffc0498f55>] cifs_revalidate_dentry_attr+0x1d5/0x250 [cifs]
[79917.287667]  [<ffffffff811eba97>] ? kmem_cache_alloc+0x187/0x1f0
[79917.287681]  [<ffffffffc0499081>] cifs_getattr+0x51/0x110 [cifs]
[79917.287683]  [<ffffffff81211d9c>] vfs_getattr_nosec+0x2c/0x40
[79917.287684]  [<ffffffff81211fb6>] vfs_getattr+0x26/0x30
[79917.287686]  [<ffffffff81212098>] vfs_fstatat+0x78/0xc0
[79917.287688]  [<ffffffff81212641>] SYSC_newlstat+0x31/0x60
[79917.287690]  [<ffffffff8121277e>] SyS_newlstat+0xe/0x10
[79917.287692]  [<ffffffff8182db32>] entry_SYSCALL_64_fastpath+0x16/0x71