Issue

• 2 Servers rebooted unexpectedly

• Kernel panic with following messages :

  BUG: unable to handle kernel paging request at ffffc9002ee7b000
  IP: [<ffffffffa080c397>] OfsZeroDiskRange+0xd57/0xff0 [oracleacfs]
  PGD 207feb9067 PUD 207feba067 PMD d77c02067 PTE 0
  Oops: 0000 [#1] SMP 
  last sysfs file: /sys/devices/virtual/net/bond0.38/carrier
  CPU 0 
  Modules linked in: bridge lin_tape(U) nfsd exportfs oracleacfs(P)(U) oracleadvm(P)(U) oracleoks(P)(U) oracleasm(U) autofs4 nfs lockd fscache auth_rpcgss nfs_acl sunrpc acpi_cpufreq freq_table mperf bonding 8021q garp stp llc ipv6 vfat fat iTCO_wdt iTCO_vendor_support microcode cdc_ether usbnet mii i2c_i801 i2c_core lpc_ich mfd_core shpchp osst st ipmi_si ipmi_msghandler sg be2net ext4 jbd2 mbcache dm_round_robin sd_mod mpt2sas scsi_transport_sas raid_class wmi lpfc(U) scsi_transport_fc scsi_tgt crc_t10dif dm_multipath dm_mirror dm_region_hash dm_log dm_mod [last unloaded: oracleoks]
  Pid: 6263, comm: oracle Tainted: P        W  ---------------    2.6.32-504.16.2.el6.x86_64 #1 IBM Flex System x240 Compute Node -[873715X]-/00AE643
  RIP: 0010:[<ffffffffa080c397>]  [<ffffffffa080c397>] OfsZeroDiskRange+0xd57/0xff0 [oracleacfs]
  RSP: 0018:ffff8805417abc78  EFLAGS: 00010206
  RAX: 000000000003f000 RBX: ffff880b1b4098c0 RCX: ffffc9002ee3c000
  RDX: ffffc9002ee3c000 RSI: 0000000000000001 RDI: ffff8820498a65e0
  RBP: ffff8805417abd18 R08: 00000000051fd798 R09: 000000000fd00037
  R10: 0000000000000068 R11: 000000000000089e R12: 0000000000000440
  R13: 0000000000000000 R14: 0000000000000008 R15: 0000000000000000
  FS:  00007f848f03d700(0000) GS:ffff88004c200000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  CR2: ffffc9002ee7b000 CR3: 0000000a28eaf000 CR4: 00000000001407f0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  Process oracle (pid: 6263, threadinfo ffff8805417aa000, task ffff8802d348d520)
  Stack:
  ffff880d7b33a460 000000000bdc4000 0000000000004000 0000000000004000
  <d> ffff88031a532aa0 001000000bdc4000 000000000bdc0000 000000000bdc4000
  <d> 0000000000004000 ffffc9002eba3000 ffff8805417abd18 000000025c000000
  Call Trace:
  [<ffffffffa08ae817>] ofs_setattr+0x1c37/0x2490 [oracleacfs]
  [<ffffffff8122e9ef>] ? security_inode_permission+0x1f/0x30
  [<ffffffff811ad398>] notify_change+0x168/0x340
  [<ffffffff8118c3e4>] do_truncate+0x64/0xa0
  [<ffffffff8118c790>] sys_ftruncate+0x120/0x130
  [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
  Code: 0a 10 48 39 c2 0f 85 cf fe ff ff 8b 43 24 48 c7 43 28 00 00 00 00 83 c0 01 4d 85 ed 89 43 24 75 76 48 8b 55 c0 89 c0 48 c1 e0 05 <48> 8b 04 10 48 89 43 18 e9 a2 fe ff ff 48 8d 47 30 66 ff 00 66 
  RIP  [<ffffffffa080c397>] OfsZeroDiskRange+0xd57/0xff0 [oracleacfs]
  RSP <ffff8805417abc78>
  CR2: ffffc9002ee7b000