[Bug binutils/11430] New: nm crashes when handling some lib file.

[hzgmaxwell at sohu dot com]

When listing symbols in a lib file, it crashed here.

#0  coff_slurp_symbol_table (abfd=0x16e3888) at coffcode.h:4519
#1  0x0040f9fc in coff_get_symtab_upper_bound (abfd=0x16e3888) at coffgen.c:338
#2  0x004057ac in _bfd_generic_read_minisymbols (abfd=0x16e3888, dynamic=0,
minisymsp=0xe2cc60, sizep=0xe2cc5c) at syms.c:808
#3  0x0040268e in display_rel_file (abfd=0x16e3888, archive_bfd=0x166b0e0) at
nm.c:1006
#4  0x00402b15 in display_archive (file=0x166b0e0) at nm.c:1147
#5  0x00402c2e in display_file (filename=0xe2cd6d "/d/WebCoreediting.lib") at
nm.c:1195
#6  0x004037d0 in main (argc=2, argv=0x166ae40) at nm.c:1661

Here is the code, the sym variable got a value as 1,
          /* FIXME: We should not be casting between ints and
             pointers like this.  */
          sym = ((coff_symbol_type *)
                 ((symndx + obj_raw_syments (abfd))
                  ->u.syment._n._n_n._n_zeroes));


then it crashed at
if (sym->lineno != NULL && ! warned)


I'm proposing a solution as below, to check the sym after setting its value.

          //brook
          if(sym < obj_symbols (abfd) ) {
              _bfd_error_handler (_("%B: warning: illegal symbol address %x,
which should be greater than %x"),
                      abfd, sym, obj_symbols (abfd));
              continue;
          }

-- 
           Summary: nm crashes when handling some lib file.
           Product: binutils
           Version: 2.21 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: hzgmaxwell at sohu dot com
                CC: bug-binutils at gnu dot org
 GCC build triplet: cygwin
  GCC host triplet: mingw32
GCC target triplet: mingw32


http://sourceware.org/bugzilla/show_bug.cgi?id=11430

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