misc/152293: SEGV in libstdc++.so.6

[kenorb]

>Number:         152293
>Category:       misc
>Synopsis:       SEGV in libstdc++.so.6
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Nov 16 12:00:19 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     kenorb
>Release:        FreeBSD 8.1-STABLE
>Organization:
>Environment:
FreeBSD kenorb 8.1-STABLE FreeBSD 8.1-STABLE #4: Mon Nov 15 14:40:15 GMT 2010     root at kenorb:/usr/obj/usr/src/sys/BRO  amd64

>Description:
libstdc++.so.6 doing SEGV when run mysql-workbench-bin
#1  0x0000000808dc9bc1 in std::char_traits<char>::length (__s=0x0) at char_traits.h:258
#2  0x0000000808dcbe15 in std::string::assign (this=0x7fffffffe4b0, __s=0x0) at basic_string.h:920
#3  0x0000000808dcbe45 in std::string::operator= (this=0x7fffffffe4b0, __s=0x0) at basic_string.h:499

Backtrace:
(gdb) bt full
#0  0x00000008092c05b7 in strlen () from /lib/libc.so.7
#1  0x0000000808dc9bc1 in std::char_traits<char>::length (__s=0x0) at char_traits.h:258
#2  0x0000000808dcbe15 in std::string::assign (this=0x7fffffffe4b0, __s=0x0) at basic_string.h:920
#3  0x0000000808dcbe45 in std::string::operator= (this=0x7fffffffe4b0, __s=0x0) at basic_string.h:499
#4  0x000000000070a87a in main (argc=1, argv=0x7fffffffe768) at main.cpp:113

It should not pass NULL into libc.

See more: http://forums.freebsd.org/showthread.php?t=19387

>How-To-Repeat:
> mysql-workbench-bin
Segmentation fault


>Fix:
Check if __s is NULL?

#2  0x0000000808dcbe15 in std::string::assign (this=0x7fffffffe4b0, __s=0x0) at basic_string.h:920
      /**
       *  @brief  Set value to contents of a C string.
       *  @param s  The C string to use.
       *  @return  Reference to this string.
       *
       *  This function sets the value of this string to the value of @a s.
       *  The data is copied, so there is no dependence on @a s once the
       *  function returns.
       */
      basic_string&
      assign(const _CharT* __s)
      {
  __glibcxx_requires_string(__s);
  return this->assign(__s, traits_type::length(__s));
#1  0x0000000808dc9bc1 in std::char_traits<char>::length (__s=0x0) at char_traits.h:258
      static size_t
      length(const char_type* __s)
      { return strlen(__s); }


>Release-Note:
>Audit-Trail:
>Unformatted: