[Bug 997315] Re: mdadm crashed with SIGSEGV in __fnmatch()

[Steve Langasek]

** Also affects: mdadm (Ubuntu Precise)
   Importance: Undecided
       Status: New

** Also affects: mdadm (Ubuntu Quantal)
   Importance: Medium
       Status: New

** Changed in: mdadm (Ubuntu Precise)
    Milestone: None => ubuntu-12.04.1

** Changed in: mdadm (Ubuntu Precise)
   Importance: Undecided => High

** Changed in: mdadm (Ubuntu Quantal)
   Importance: Medium => High

** Visibility changed to: Public

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Title:
  mdadm crashed with SIGSEGV in __fnmatch()

Status in “mdadm” package in Ubuntu:
  New
Status in “mdadm” source package in Precise:
  New
Status in “mdadm” source package in Quantal:
  New

Bug description:
  I was performing a dist upgrade from 11.10 to 12.04 in a tmux. Went
  away and got this error.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: mdadm 3.2.3-2ubuntu1
  ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
  Uname: Linux 3.0.0-14-generic x86_64
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  Date: Wed May  9 09:40:43 2012
  ExecutablePath: /sbin/mdadm
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MDadmExamine.dev.sda:
   /dev/sda:
      MBR Magic : aa55
   Partition[0] :    150390625 sectors at           63 (type 83)
   Partition[1] :      5910530 sectors at    150390782 (type 05)
  MDadmExamine.dev.sda1:
   /dev/sda1:
      MBR Magic : aa55
  MDadmExamine.dev.sda2:
   /dev/sda2:
      MBR Magic : aa55
   Partition[0] :      5910528 sectors at            2 (type 82)
  MDadmExamine.dev.sda5: Error: command ['/sbin/mdadm', '-E', '/dev/sda5'] failed with exit code 1: mdadm: No md superblock detected on /dev/sda5.
  MDadmExamine.dev.sdc:
   /dev/sdc:
      MBR Magic : aa55
   Partition[0] :    976768002 sectors at           63 (type fd)
  MDadmExamine.dev.sdd:
   /dev/sdd:
      MBR Magic : aa55
   Partition[0] :    976768002 sectors at           63 (type fd)
  MDadmExamine.dev.sde:
   /dev/sde:
      MBR Magic : aa55
   Partition[0] :    976768002 sectors at           63 (type fd)
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcCmdline: /sbin/mdadm --detail --scan
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-14-generic root=UUID=06a3a2a1-b1c1-43a5-adc3-1002b42dd660 ro quiet splash vt.handoff=7
  ProcMDstat:
   Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
   md0 : active raid5 sdb1[3] sde1[0] sdd1[2] sdc1[1]
         1465151808 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
         
   unused devices: <none>
  SegvAnalysis:
   Segfault happened at: 0x7fc69f136b91:	movdqu (%rdi),%xmm1
   PC (0x7fc69f136b91) ok
   source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%xmm1" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: mdadm
  StacktraceTop:
   ?? () from /lib/x86_64-linux-gnu/libc.so.6
   fnmatch () from /lib/x86_64-linux-gnu/libc.so.6
   ?? ()
   ?? ()
   ?? ()
  Title: mdadm crashed with SIGSEGV in fnmatch()
  UpgradeStatus: Upgraded to precise on 2012-05-09 (0 days ago)
  UserGroups:
   
  dmi.bios.date: 11/14/2005
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1017.002
  dmi.board.name: A8V Deluxe
  dmi.board.vendor: ASUSTeK Computer Inc.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1017.002:bd11/14/2005:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASUSTeKComputerInc.:rnA8VDeluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.
  etc.blkid.tab: <device DEVNO="0x0841" TIME="1336571423.541689" UUID="bb2b20ae-a5b6-e4bf-345a-719cee0e83b4" TYPE="linux_raid_member">/dev/sde1</device>

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