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Fix a few moere memory access violations. 

PR binutils/17512
	* dwarf.c (display_gdb_index): Add more range checks.
This commit is contained in:
Nick Clifton 2014-12-11 20:25:05 +00:00
parent 05a6c3c813
commit acff96643e
2 changed files with 20 additions and 5 deletions
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5
binutils/ChangeLog
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@ -1,3 +1,8 @@
2014-12-11 Nick Clifton <nickc@redhat.com>
PR binutils/17512
* dwarf.c (display_gdb_index): Add more range checks.
2014-12-11 Alan Modra <amodra@gmail.com>
* configure.ac: Check for long long and sizes of long long and long.

20
binutils/dwarf.c
View File

@ -6509,7 +6509,7 @@ display_gdb_index (struct dwarf_section *section,
/* PR 17531: file: 18a47d3d. */
if (symbol_table_offset < address_table_offset)
{
warn (_("Symbolt table offset (%xl) is less then Address table offset (%x)\n"),
warn (_("Symbol table offset (%xl) is less then Address table offset (%x)\n"),
symbol_table_offset, address_table_offset);
return 0;
}
@ -6531,6 +6531,12 @@ display_gdb_index (struct dwarf_section *section,
symbol_table = start + symbol_table_offset;
constant_pool = start + constant_pool_offset;
if (address_table + address_table_size * (2 + 8 + 4) > section->start + section->size)
{
warn (_("Address table extends beyond end of section. %x"), address_table_size);
return 0;
}
printf (_("\nCU table:\n"));
for (i = 0; i < cu_list_elements; i += 2)
{
@ -6557,7 +6563,8 @@ display_gdb_index (struct dwarf_section *section,
}
printf (_("\nAddress table:\n"));
for (i = 0; i <= address_table_size - (2 * 8 + 4); i += 2 * 8 + 4)
for (i = 0; i < address_table_size && i <= address_table_size - (2 * 8 + 4);
i += 2 * 8 + 4)
{
uint64_t low = byte_get_little_endian (address_table + i, 8);
uint64_t high = byte_get_little_endian (address_table + i + 8, 8);
@ -6589,7 +6596,9 @@ display_gdb_index (struct dwarf_section *section,
name_offset, i);
}
else
printf ("[%3u] %s:", i, constant_pool + name_offset);
printf ("[%3u] %.*s:", i,
(int) (section->size - (constant_pool_offset + name_offset)),
constant_pool + name_offset);
if (constant_pool + cu_vector_offset < constant_pool
|| constant_pool + cu_vector_offset >= section->start + section->size)
@ -6602,11 +6611,12 @@ display_gdb_index (struct dwarf_section *section,
else
num_cus = byte_get_little_endian (constant_pool + cu_vector_offset, 4);
if (constant_pool + cu_vector_offset + 4 + num_cus * 4 >=
if (num_cus * 4 < num_cus
|| constant_pool + cu_vector_offset + 4 + num_cus * 4 >=
section->start + section->size)
{
printf ("<invalid number of CUs: %d>\n", num_cus);
warn (_("Invalid number of CUs (%d) for symbol table slot %d\n"),
warn (_("Invalid number of CUs (0x%x) for symbol table slot %d\n"),
num_cus, i);
continue;
}