[Bug gdb/14494] New: gdb crashes in bfd_getl16 on debuginfo file

["arjan at linux dot intel.com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=14494

             Bug #: 14494
           Summary: gdb crashes in bfd_getl16 on debuginfo file
           Product: gdb
           Version: 7.5
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
        AssignedTo: unassigned@sourceware.org
        ReportedBy: arjan@linux.intel.com
    Classification: Unclassified


Created attachment 6590
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6590
the libc.so file that causes the crash

gdb -readnow /usr/lib/debug/lib64/libc-2.16.so.debug

gives the following backtrace:


#0  bfd_getl16 (p=0x7fd47abc965b) at libbfd.c:570
#1  0x000000000057333a in read_2_bytes (buf=0x7fd47abc965b <Address
0x7fd47abc965b out of bounds>, abfd=<optimized out>)
    at dwarf2read.c:13088
#2  dwarf_parse_macro_header
(opcode_definitions=opcode_definitions@entry=0x7fff1d59ddf0,
abfd=abfd@entry=0x26ed6c0,
    mac_ptr=0x7fd47abc965b <Address 0x7fd47abc965b out of bounds>,
offset_size=offset_size@entry=0x7fff1d59dde8,
    section_is_gnu=section_is_gnu@entry=1) at dwarf2read.c:17156
#3  0x000000000057c1ac in dwarf_decode_macros (cu=cu@entry=0x27929b0,
offset=5835,
    comp_dir=0x7fd47c59d368 <Address 0x7fd47c59d368 out of bounds>,
section_is_gnu=section_is_gnu@entry=1)
    at dwarf2read.c:17509
#4  0x0000000000589a81 in read_file_scope (cu=<optimized out>, die=<optimized
out>) at dwarf2read.c:7691
#5  process_die (die=<optimized out>, cu=cu@entry=0x27929b0) at
dwarf2read.c:6872
#6  0x000000000058d7da in process_full_comp_unit
(pretend_language=language_minimal, per_cu=0x2702790) at dwarf2read.c:6680
#7  process_queue () at dwarf2read.c:6250
#8  dw2_do_instantiate_symtab (per_cu=per_cu@entry=0x2702790) at
dwarf2read.c:2177
#9  0x000000000058dd2c in dw2_instantiate_symtab (per_cu=0x2702790) at
dwarf2read.c:2198
#10 0x000000000058e192 in dw2_expand_all_symtabs (objfile=<optimized out>) at
dwarf2read.c:3136
#11 0x0000000000509996 in symbol_file_add_with_addrs_or_offsets
(abfd=<optimized out>, add_flags=6, addrs=addrs@entry=0x0,
    flags=<optimized out>, flags@entry=0, parent=parent@entry=0x0,
num_offsets=0, offsets=0x0) at symfile.c:1126
#12 0x0000000000509c4a in symbol_file_add_from_bfd (abfd=<optimized out>,
add_flags=<optimized out>, addrs=addrs@entry=0x0,
    flags=flags@entry=0, parent=parent@entry=0x0) at symfile.c:1198
#13 0x0000000000509c91 in symbol_file_add (name=name@entry=0x7fff1d59fdaa
"/usr/lib/debug/lib64/libc-2.16.so.debug",
    add_flags=<optimized out>, addrs=addrs@entry=0x0, flags=flags@entry=0) at
symfile.c:1210
#14 0x000000000050a045 in symbol_file_add_main_1 (args=0x7fff1d59fdaa
"/usr/lib/debug/lib64/libc-2.16.so.debug", from_tty=1,
    flags=0) at symfile.c:1235
#15 0x000000000052e6cf in catch_command_errors (command=0x50a1a0
<symbol_file_add_main>,
    arg=arg@entry=0x7fff1d59fdaa "/usr/lib/debug/lib64/libc-2.16.so.debug",
from_tty=1, mask=mask@entry=6) at exceptions.c:573
#16 0x0000000000530add in captured_main (data=data@entry=0x7fff1d59ea80) at
main.c:899


(the crash happens also on a regular "bt" command of some crashed application,
but this is the easiest testcase)

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