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Check the abbrev offset found in the .debug_info section before using

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it.
This commit is contained in:
Andrew Cagney 1997-11-26 12:35:07 +00:00
parent 0d5d0d102d
commit 3199620a49
2 changed files with 22 additions and 2 deletions
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10
gdb/ChangeLog
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@ -1,8 +1,18 @@
Wed Nov 26 09:59:47 1997 Andrew Cagney <cagney@b1.cygnus.com>
* dwarf2read.c (struct comp_unit_head): Change length and
abbrev_offset fields to unsigned int.
(dwarf2_build_psymtabs_hard): Verify length and offset read from
.debug_info section.
Mon Nov 24 14:17:02 1997 Michael Snyder (msnyder@cleaver.cygnus.com)
* infcmd.c: export registers_info, for use by other modules.
* printcmd.c: export output_command, for use by other modules.
* stack.c: export locals_info and args_info, for use by other modules.
* remote.c: export getpkt, putpkt, and fromhex for external use.
Make fromhex case-insensative. New function "remote_console_output"
abstracts the acceptance of "O" packets from target.
Mon Nov 24 08:59:28 1997 Andrew Cagney <cagney@b1.cygnus.com>

14
gdb/dwarf2read.c
View File

@ -147,9 +147,9 @@ static unsigned int dwarf_str_size;
/* The data in a compilation unit header looks like this. */
struct comp_unit_head
{
int length;
unsigned int length;
short version;
int abbrev_offset;
unsigned int abbrev_offset;
unsigned char addr_size;
};
@ -932,6 +932,16 @@ dwarf2_build_psymtabs_hard (objfile, section_offsets, mainline)
error ("Dwarf Error: wrong version in compilation unit header.");
return;
}
if (cu_header.abbrev_offset >= dwarf_abbrev_size)
{
error ("Dwarf Error: bad offset in compilation unit header.");
return;
}
if (cu_header.length > dwarf_abbrev_size - cu_header.abbrev_offset)
{
error ("Dwarf Error: bad length in compilation unit header.");
return;
}
/* Read the abbrevs for this compilation unit into a table */
dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);