[Bug 1818953] Re: Perl core dumping core on UBUNTU 19.04 by executing perl script

Mon Mar 11 11:59:41 UTC 2019

On an amd64 machine, I do get a core dump:

xnox at ottawa:~$ lscpu 
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
Address sizes:       39 bits physical, 48 bits virtual
CPU(s):              8
On-line CPU(s) list: 0-7
Thread(s) per core:  2
Core(s) per socket:  4
Socket(s):           1
NUMA node(s):        1
Vendor ID:           GenuineIntel
CPU family:          6
Model:               94
Model name:          Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
Stepping:            3
CPU MHz:             800.003
CPU max MHz:         3500.0000
CPU min MHz:         800.0000
BogoMIPS:            5184.00
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            256K
L3 cache:            6144K
NUMA node0 CPU(s):   0-7
Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp flush_l1d
xnox at ottawa:~$ cat test.pl 
#!//usr/bin/perl

use POSIX qw(mblen);

my $str = "data";

print "Calling mblen with str=$str\n";
my $len = mblen($str, MB_CUR_MAX);
print "mblen returned with len=$len\n";

xnox at ottawa:~$ ./test.pl 
Calling mblen with str=data
perl: mbrtowc.c:105: __mbrtowc: Assertion `__mbsinit (data.__statep)' failed.
Aborted (core dumped)

** Summary changed:

- Perl core dumping core on UBUNTU 19.04 by executing perl script
+ mblen() failing in Perl / Perl core dumping core on UBUNTU 19.04 by executing perl script, multiple architectures

** Changed in: perl (Ubuntu)
       Status: Incomplete => Confirmed

** Changed in: perl (Ubuntu)
   Importance: Undecided => Critical

** Changed in: perl (Ubuntu)
    Milestone: None => ubuntu-19.04

** Tags added: rls-bb-incoming

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https://bugs.launchpad.net/bugs/1818953

Title:
  mblen() failing in Perl / Perl core dumping core on UBUNTU 19.04 by
  executing perl script, multiple architectures

Status in The Ubuntu-power-systems project:
  Incomplete
Status in perl package in Ubuntu:
  Confirmed

Bug description:
  == Comment: #0 - NAGENDRA P. DONTAMSETTY <ndontams at in.ibm.com> - 2019-02-28 00:14:49 ==
  ---Problem Description---
  Perl core dumping core on UBUNTU 19.04 by executing perl script

  ---uname output---
  root at p8ct1p13:/tmp# uname -a Linux p8ct1p13.in.ibm.com 4.19.0-13-generic #14-Ubuntu SMP Thu Feb 7 21:50:00 UTC 2019 ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = ppc64le and power8 

  ---Debugger Data---
  root at p8ct1p13:/tmp# file core
  core: ELF 64-bit LSB core file, 64-bit PowerPC or cisco 7500, version 1 (SYSV), SVR4-style, from '/usr/bin/perl /usr/bin/mkrsrc IBM.Ray Name=fvt1 NodeNameList={p8ct1p09.in.ibm.c', real uid: 0, effective uid: 0, real gid: 0, effective gid: 0, execfn: '/usr/bin/mkrsrc', platform: 'power8'

  ---Steps to Reproduce---
   Description:  Perl core dumpinmg core on UBUNTU 19.04 by exec cmd "mkrsrc"

  root at p8ct1p13:/tmp# uname -a
  Linux p8ct1p13.in.ibm.com 4.19.0-13-generic #14-Ubuntu SMP Thu Feb 7 21:50:00 UTC 2019 ppc64le ppc64le ppc64le GNU/Linux

  root at p8ct1p13:~# cat /etc/os-release
  NAME="Ubuntu"
  VERSION="19.04 (Disco Dingo)"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu Disco Dingo (development branch)"
  VERSION_ID="19.04"
  HOME_URL="https://www.ubuntu.com/"
  SUPPORT_URL="https://help.ubuntu.com/"
  BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
  PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
  VERSION_CODENAME=disco
  UBUNTU_CODENAME=disco

  root at p8ct1p13:~# ctversion -bv
  RSCT_Build_Name=rsholxs002a 3.2.4.2 RSCT_Build_Time=19043.16:11:49 RSCT_Build_Context=ppc64le_linux_2

  root at p8ct1p13:/tmp# mkrsrc IBM.Ray Name="fvt1" NodeNameList={"p8ct1p09.in.ibm.com"} ManualMode=0 Int32=00 String="Initial Test String 2"
  perl: mbrtowc.c:105: __mbrtowc: Assertion `__mbsinit (data.__statep)' failed.
  Aborted (core dumped)

  root at p8ct1p13:/tmp# file core
  core: ELF 64-bit LSB core file, 64-bit PowerPC or cisco 7500, version 1 (SYSV), SVR4-style, from '/usr/bin/perl /usr/bin/mkrsrc IBM.Ray Name=fvt1 NodeNameList={p8ct1p09.in.ibm.c', real uid: 0, effective uid: 0, real gid: 0, effective gid: 0, execfn: '/usr/bin/mkrsrc', platform: 'power8'

  root at p8ct1p13:/tmp# which mkrsrc
  /usr/bin/mkrsrc

  root at p8ct1p13:/tmp# file /usr/bin/mkrsrc

  /usr/bin/mkrsrc: symbolic link to /opt/rsct/bin/mkrsrc

  root at p8ct1p13:/tmp# file /opt/rsct/bin/mkrsrc
  /opt/rsct/bin/mkrsrc: Perl script text executable

  Contact Information = Nagendra Dontamsetty/ndontams at in.ibm.com, Anirban/anirbank at in.ibm.com 

  Userspace tool common name: perl 5 

  The userspace tool has the following bit modes: 64bit 

  Userspace rpm: ii  perl                                  5.28.1-4
  ppc64el

  Userspace tool obtained from project website:  na 

  *Additional Instructions for Nagendra Dontamsetty/ndontams at in.ibm.com, Anirban/anirbank at in.ibm.com: 
  -Post a private note with access information to the machine that is currently in the debugger.
  -Attach ltrace and strace of userspace application.

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