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intl: avoid alloca for arbitrary sizes (bug 32380)

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Use malloc for the copy of the domain name and the category value, which
can both be of arbitrary size.
This commit is contained in:
Andreas Schwab 2024-11-20 10:01:29 +01:00
parent 47311cca31
commit ab545460b0
1 changed files with 12 additions and 39 deletions
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51
intl/dcigettext.c
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@ -374,34 +374,7 @@ static const char *get_output_charset (struct binding *domainbinding);
#ifdef HAVE_ALLOCA
/* Nothing has to be done. */
# define freea(p) /* nothing */
# define ADD_BLOCK(list, address) /* nothing */
# define FREE_BLOCKS(list) /* nothing */
#else
struct block_list
{
void *address;
struct block_list *next;
};
# define ADD_BLOCK(list, addr) \
do { \
struct block_list *newp = (struct block_list *) malloc (sizeof (*newp)); \
/* If we cannot get a free block we cannot add the new element to \
the list. */ \
if (newp != NULL) { \
newp->address = (addr); \
newp->next = (list); \
(list) = newp; \
} \
} while (0)
# define FREE_BLOCKS(list) \
do { \
while (list != NULL) { \
struct block_list *old = list; \
list = list->next; \
free (old->address); \
free (old); \
} \
} while (0)
# undef alloca
# define alloca(size) (malloc (size))
# define freea(p) free (p)
@ -483,17 +456,14 @@ DCIGETTEXT (const char *domainname, const char *msgid1, const char *msgid2,
int plural, unsigned long int n, int category)
#endif
{
#ifndef HAVE_ALLOCA
struct block_list *block_list = NULL;
#endif
struct loaded_l10nfile *domain;
struct binding *binding;
const char *categoryname;
const char *categoryvalue;
const char *dirname;
char *xdirname = NULL;
char *xdomainname;
char *single_locale;
char *xdomainname = NULL;
char *single_locale = NULL;
char *retval;
size_t retlen;
int saved_errno;
@ -648,18 +618,19 @@ DCIGETTEXT (const char *domainname, const char *msgid1, const char *msgid2,
#endif
domainname_len = strlen (domainname);
xdomainname = (char *) alloca (strlen (categoryname)
xdomainname = (char *) malloc (strlen (categoryname)
+ domainname_len + 5);
ADD_BLOCK (block_list, xdomainname);
if (xdomainname == NULL)
goto return_untranslated;
stpcpy ((char *) mempcpy (stpcpy (stpcpy (xdomainname, categoryname), "/"),
domainname, domainname_len),
".mo");
/* Creating working area. */
single_locale = (char *) alloca (strlen (categoryvalue) + 1);
ADD_BLOCK (block_list, single_locale);
single_locale = (char *) malloc (strlen (categoryvalue) + 1);
if (single_locale == NULL)
goto return_untranslated;
/* Search for the given string. This is a loop because we perhaps
got an ordered list of languages to consider for the translation. */
@ -748,7 +719,8 @@ DCIGETTEXT (const char *domainname, const char *msgid1, const char *msgid2,
/* Found the translation of MSGID1 in domain DOMAIN:
starting at RETVAL, RETLEN bytes. */
free (xdirname);
FREE_BLOCKS (block_list);
free (xdomainname);
free (single_locale);
if (foundp == NULL)
{
/* Create a new entry and add it to the search tree. */
@ -832,7 +804,8 @@ DCIGETTEXT (const char *domainname, const char *msgid1, const char *msgid2,
return_untranslated:
/* Return the untranslated MSGID. */
free (xdirname);
FREE_BLOCKS (block_list);
free (xdomainname);
free (single_locale);
gl_rwlock_unlock (_nl_state_lock);
#ifdef _LIBC
__libc_rwlock_unlock (__libc_setlocale_lock);