IJ22334: STRINGS SEGFAULT IN MBRTOWC WITH MULTIBYTE DATA APPLIES TO AIX 7200-02

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The strings command may coredump on a multibyte file.
  % LANG=EN_US.UTF-8
  % strings -a /usr/lib/libc.a
  
  Segmentation fault in mbrtowc at 0xd040b294
  
  (dbx) where
  mbrtowc(??, ??, ??, ??) at 0xd040b294
  __mbtopc_std(??, ??, ??, ??, ??, ??, ??) at 0xd057f0b8
  __mbtopc(??, ??, ??, ??) at 0xd0100694
  getwc_unlocked(??) at 0xd01fab78
  getwc(??) at 0xd01fa958
  findMB(??, ??, ??) at 0x10000d44
  main(??, ??) at 0x10000698
  

Local fix

• use ASCII LANG:
  C or en_US.ISO8859-1, for example
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:
  * Systems running the 7200-02 Technology Level with
  * any of the following filesets at or between the given levels:
  * MIN          MAX          FILESET
  * 7.2.2.0      7.2.2.20     bos.64bit
  * 7.2.2.0      7.2.2.20     bos.adt.prof
  * 7.2.2.0      7.2.2.19     bos.rte.control
  * 7.2.2.0      7.2.2.20     bos.rte.libc
  * 7.2.2.0      7.2.2.19     bos.rte.shell
  * 7.2.2.0      7.2.2.20     mcr.rte
  ****************************************************************
  * PROBLEM DESCRIPTION:
  * The strings command may coredump on a multibyte file.
  * % LANG=EN_US.UTF-8
  * % strings -a /usr/lib/libc.a
  * Segmentation fault in mbrtowc at 0xd040b294
  * (dbx) where
  * mbrtowc(??, ??, ??, ??) at 0xd040b294
  * __mbtopc_std(??, ??, ??, ??, ??, ??, ??) at 0xd057f0b8
  * __mbtopc(??, ??, ??, ??) at 0xd0100694
  * getwc_unlocked(??) at 0xd01fab78
  * getwc(??) at 0xd01fa958
  * findMB(??, ??, ??) at 0x10000d44
  * main(??, ??) at 0x10000698
  ****************************************************************
  * RECOMMENDATION:
  * Install APAR IJ22334.
  ****************************************************************
  

Problem conclusion

• Made necessary changes in mutibyte code to fix the problem.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IJ19822

• APAR is sysrouted TO one or more of the following:

  U887765

Fix information

• Fixed component name

  AIX V7.2

• Fixed component ID

  5765CD200

Applicable component levels

• R720 PSY U887765

     UP20/07/27 I 1000