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re PR lto/41550 (Fix security and portability issues in lto-plugin)

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2010-04-23  Richard Guenther  <rguenther@suse.de>

	PR lto/41550
	* lto-plugin.c (parse_table_entry): Use xstrdup and xrealloc.
	(translate): Likewise.
	(all_symbols_read_handler): Likewise.
	(claim_file_handler): Likewise.
	(process_option): Likewise.
	(add_output_files): Likewise.  Remove filename length limit.

From-SVN: r158673
This commit is contained in:
Richard Guenther 2010-04-23 15:49:10 +00:00 committed by Richard Biener
parent 4e708ff754
commit ed0f0c0f24
2 changed files with 38 additions and 21 deletions
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10
lto-plugin/ChangeLog
View File

@ -1,3 +1,13 @@
2010-04-23 Richard Guenther <rguenther@suse.de>
PR lto/41550
* lto-plugin.c (parse_table_entry): Use xstrdup and xrealloc.
(translate): Likewise.
(all_symbols_read_handler): Likewise.
(claim_file_handler): Likewise.
(process_option): Likewise.
(add_output_files): Likewise. Remove filename length limit.
2010-04-02 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* Makefile.in: Regenerate.

49
lto-plugin/lto-plugin.c
View File

@ -140,7 +140,7 @@ parse_table_entry (char *p, struct ld_plugin_symbol *entry, uint32_t *slot)
LDPV_HIDDEN
};
entry->name = strdup (p);
entry->name = xstrdup (p);
while (*p)
p++;
p++;
@ -155,7 +155,7 @@ parse_table_entry (char *p, struct ld_plugin_symbol *entry, uint32_t *slot)
if (strlen (entry->comdat_key) == 0)
entry->comdat_key = NULL;
else
entry->comdat_key = strdup (entry->comdat_key);
entry->comdat_key = xstrdup (entry->comdat_key);
t = *p;
check (t <= 4, LDPL_FATAL, "invalid symbol kind found");
@ -233,9 +233,9 @@ translate (Elf_Data *symtab, struct plugin_symtab *out)
while (data < end)
{
n++;
syms = realloc (syms, n * sizeof (struct ld_plugin_symbol));
syms = xrealloc (syms, n * sizeof (struct ld_plugin_symbol));
check (syms, LDPL_FATAL, "could not allocate memory");
slots = realloc (slots, n * sizeof (uint32_t));
slots = xrealloc (slots, n * sizeof (uint32_t));
check (slots, LDPL_FATAL, "could not allocate memory");
data = parse_table_entry (data, &syms[n - 1], &slots[n - 1]);
}
@ -343,22 +343,29 @@ write_resolution (void)
static void
add_output_files (FILE *f)
{
char fname[1000]; /* FIXME: Remove this restriction. */
for (;;)
{
const unsigned piece = 32;
char *buf, *s = xmalloc (piece);
size_t len;
char *s = fgets (fname, sizeof (fname), f);
if (!s)
break;
buf = s;
cont:
if (!fgets (buf, piece, f))
break;
len = strlen (s);
check (s[len - 1] == '\n', LDPL_FATAL, "file name too long");
if (s[len - 1] != '\n')
{
s = xrealloc (s, len + piece);
buf = s + len;
goto cont;
}
s[len - 1] = '\0';
num_output_files++;
output_files = realloc (output_files, num_output_files * sizeof (char *));
output_files[num_output_files - 1] = strdup (s);
output_files
= xrealloc (output_files, num_output_files * sizeof (char *));
output_files[num_output_files - 1] = s;
add_input_file (output_files[num_output_files - 1]);
}
}
@ -472,7 +479,7 @@ all_symbols_read_handler (void)
return LDPS_OK;
}
lto_argv = (char **) calloc (sizeof (char *), num_lto_args);
lto_argv = (char **) xcalloc (sizeof (char *), num_lto_args);
lto_arg_ptr = (const char **) lto_argv;
assert (lto_wrapper_argv);
@ -591,7 +598,7 @@ claim_file_handler (const struct ld_plugin_input_file *file, int *claimed)
}
else
{
lto_file.name = strdup (file->name);
lto_file.name = xstrdup (file->name);
elf = elf_begin (file->fd, ELF_C_READ, NULL);
}
lto_file.handle = file->handle;
@ -614,8 +621,8 @@ claim_file_handler (const struct ld_plugin_input_file *file, int *claimed)
*claimed = 1;
num_claimed_files++;
claimed_files =
realloc (claimed_files,
num_claimed_files * sizeof (struct plugin_file_info));
xrealloc (claimed_files,
num_claimed_files * sizeof (struct plugin_file_info));
claimed_files[num_claimed_files - 1] = lto_file;
goto cleanup;
@ -642,18 +649,18 @@ process_option (const char *option)
else if (!strncmp (option, "-pass-through=", strlen("-pass-through=")))
{
num_pass_through_items++;
pass_through_items = realloc (pass_through_items,
num_pass_through_items * sizeof (char *));
pass_through_items = xrealloc (pass_through_items,
num_pass_through_items * sizeof (char *));
pass_through_items[num_pass_through_items - 1] =
strdup (option + strlen ("-pass-through="));
xstrdup (option + strlen ("-pass-through="));
}
else
{
int size;
lto_wrapper_num_args += 1;
size = lto_wrapper_num_args * sizeof (char *);
lto_wrapper_argv = (char **) realloc (lto_wrapper_argv, size);
lto_wrapper_argv[lto_wrapper_num_args - 1] = strdup(option);
lto_wrapper_argv = (char **) xrealloc (lto_wrapper_argv, size);
lto_wrapper_argv[lto_wrapper_num_args - 1] = xstrdup(option);
}
}