kernel: INFO: rcu_sched detected stall on CPU 1 (t=195120 jiffies)

Guten Tag,
seit ein paar Tagen muss ich am Morgen den Rechner einmal neustarten, da er auf keine Netz-Anfragen reagiert.
Weder ssh oder openvpn. Nur ping zeigt das der Rechner noch am Leben ist.
In der syslog taucht in den frühen Morgenstunden aber immer wieder folgende LOG Einträge:

System ubuntu 14.04 LTS
Kernel: 3.2.13-grsec-xxxx-grs-ipv6-64

Feb 28 04:07:37 ks3298985 kernel: INFO: rcu_sched detected stall on CPU 1 (t=195120 jiffies)
Feb 28 04:07:37 ks3298985 kernel: Pid: 8891, comm: sh Tainted: G D 3.2.13-grsec-xxxx-grs-ipv6-64 #1
Feb 28 04:07:37 ks3298985 kernel: Call Trace:
Feb 28 04:07:37 ks3298985 kernel: <IRQ> [<ffffffff810dc589>] __rcu_pending+0x159/0x410
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810dc89f>] rcu_check_callbacks+0x5f/0x120
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810983a1>] update_process_times+0x41/0x80
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810b93d6>] tick_sched_timer+0x66/0xb0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810ad120>] __run_hrtimer+0x40/0xe0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810ad3ed>] hrtimer_interrupt+0xcd/0x1f0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8105e9f4>] smp_apic_timer_interrupt+0x64/0xa0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81b4d088>] apic_timer_interrupt+0x68/0x70
Feb 28 04:07:37 ks3298985 kernel: <EOI> [<ffffffff81133ed0>] ? put_filp+0x50/0x50
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81152162>] ? mntput_no_expire+0x42/0x160
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8114b080>] ? dput+0x40/0x300
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8115229a>] mntput+0x1a/0x30
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81134067>] fput+0x157/0x1f0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8110cb40>] remove_vma+0x40/0x80
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8110cc83>] exit_mmap+0x103/0x120
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81087ecf>] mmput+0x3f/0xe0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8108c8c7>] exit_mm+0x117/0x140
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8108e9cc>] do_exit+0x6fc/0x890
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810ae8d5>] ? up+0x35/0x50
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8108eba3>] do_group_exit+0x43/0xb0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81044c81>] oops_end+0xe1/0xf0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81068532>] no_context+0xf2/0x290
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81068825>] __bad_area_nosemaphore+0x155/0x230
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810e9cd9>] ? find_get_page+0x19/0xc0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810ea7d9>] ? filemap_fault+0x89/0x3e0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810e9f35>] ? unlock_page+0x25/0x30
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81068959>] bad_area+0x49/0x60
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81068f73>] do_page_fault+0x3f3/0x460
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff811069f8>] ? handle_pte_fault+0x98/0x870
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81148304>] ? __d_lookup+0x84/0x140
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81b4c2bf>] page_fault+0x1f/0x30
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8114f548>] ? alloc_fd+0x88/0x140
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff810e9f35>] ? unlock_page+0x25/0x30
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8113e94c>] link_path_walk+0x8c/0x920
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81126469>] ? kmem_cache_alloc+0x69/0xa0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8113f5dd>] ? path_init+0x30d/0x3a0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81142a35>] path_openat+0xb5/0x450
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81588fb7>] ? strncpy_from_user+0x37/0x50
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81142ee3>] do_filp_open+0x43/0xa0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8114f324>] ? expand_files+0x44/0x1e0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff8114f50a>] ? alloc_fd+0x4a/0x140
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81130612>] do_sys_open+0x152/0x1f0
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff811306db>] sys_open+0x1b/0x20
Feb 28 04:07:37 ks3298985 kernel: [<ffffffff81b4c6b6>] system_call_fastpath+0x18/0x1d
Feb 28 04:08:01 ks3298985 CRON[9844]: (root) CMD (/usr/local/rtm/bin/rtm 41 > /dev/null 2> /dev/null)
Feb 28 04:09:01 ks3298985 CRON[9898]: (root) CMD ( /bin/scripte/folderwatch/magic)
Feb 28 04:09:01 ks3298985 CRON[9899]: (root) CMD ( /bin/scripte/startup/sudonaut)
Feb 28 04:09:01 ks3298985 CRON[9901]: (root) CMD (/usr/local/rtm/bin/rtm 41 > /dev/null 2> /dev/null)
Feb 28 04:09:01 ks3298985 CRON[9900]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Feb 28 04:09:02 ks3298985 rwhod[13031]: sending on interface eth0:2
Feb 28 04:09:02 ks3298985 rwhod[13031]: sending on interface eth0:1
Feb 28 04:09:02 ks3298985 rwhod[13031]: sending on interface eth0
Feb 28 04:10:01 ks3298985 CRON[9966]: (root) CMD (/usr/local/rtm/bin/rtm 41 > /dev/null 2> /dev/null)
Feb 28 04:10:37 ks3298985 kernel: INFO: rcu_sched detected stall on CPU 1 (t=240150 jiffies)
Feb 28 04:10:37 ks3298985 kernel: Pid: 8891, comm: sh Tainted: G D 3.2.13-grsec-xxxx-grs-ipv6-64 #1
Feb 28 04:10:37 ks3298985 kernel: Call Trace:
Feb 28 04:10:37 ks3298985 kernel: <IRQ> [<ffffffff810dc589>] __rcu_pending+0x159/0x410
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810dc89f>] rcu_check_callbacks+0x5f/0x120
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810983a1>] update_process_times+0x41/0x80
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810b93d6>] tick_sched_timer+0x66/0xb0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810ad120>] __run_hrtimer+0x40/0xe0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810ad3ed>] hrtimer_interrupt+0xcd/0x1f0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8105e9f4>] smp_apic_timer_interrupt+0x64/0xa0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81b4d088>] apic_timer_interrupt+0x68/0x70
Feb 28 04:10:37 ks3298985 kernel: <EOI> [<ffffffff81133ed0>] ? put_filp+0x50/0x50
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81152162>] ? mntput_no_expire+0x42/0x160
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8114b080>] ? dput+0x40/0x300
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8115229a>] mntput+0x1a/0x30
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81134067>] fput+0x157/0x1f0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8110cb40>] remove_vma+0x40/0x80
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8110cc83>] exit_mmap+0x103/0x120
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81087ecf>] mmput+0x3f/0xe0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8108c8c7>] exit_mm+0x117/0x140
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8108e9cc>] do_exit+0x6fc/0x890
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810ae8d5>] ? up+0x35/0x50
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8108eba3>] do_group_exit+0x43/0xb0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81044c81>] oops_end+0xe1/0xf0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81068532>] no_context+0xf2/0x290
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81068825>] __bad_area_nosemaphore+0x155/0x230
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810e9cd9>] ? find_get_page+0x19/0xc0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810ea7d9>] ? filemap_fault+0x89/0x3e0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810e9f35>] ? unlock_page+0x25/0x30
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81068959>] bad_area+0x49/0x60
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81068f73>] do_page_fault+0x3f3/0x460
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff811069f8>] ? handle_pte_fault+0x98/0x870
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81148304>] ? __d_lookup+0x84/0x140
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81b4c2bf>] page_fault+0x1f/0x30
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8114f548>] ? alloc_fd+0x88/0x140
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff810e9f35>] ? unlock_page+0x25/0x30
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8113e94c>] link_path_walk+0x8c/0x920
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81126469>] ? kmem_cache_alloc+0x69/0xa0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8113f5dd>] ? path_init+0x30d/0x3a0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81142a35>] path_openat+0xb5/0x450
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81588fb7>] ? strncpy_from_user+0x37/0x50
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81142ee3>] do_filp_open+0x43/0xa0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8114f324>] ? expand_files+0x44/0x1e0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff8114f50a>] ? alloc_fd+0x4a/0x140
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81130612>] do_sys_open+0x152/0x1f0
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff811306db>] sys_open+0x1b/0x20
Feb 28 04:10:37 ks3298985 kernel: [<ffffffff81b4c6b6>] system_call_fastpath+0x18/0x1d

Hat jemand vielleicht eine Erklärung für diese Einträge? ich würde gernr einschätzen ob das ein Hardware- oder Kernelproblem ist.

Grüsse

Thomas