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net: Prevent overflows when allocating memory for arrays

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Use grub_calloc() when allocating memory for arrays to ensure proper
overflow checks are in place.

Signed-off-by: Lidong Chen <lidong.chen@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Lidong Chen 2025-01-22 18:04:43 +00:00 committed by Daniel Kiper
parent 4beeff8a31
commit dee2c14fd6
2 changed files with 4 additions and 4 deletions
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4
grub-core/net/dns.c
View File

@ -470,8 +470,8 @@ grub_net_dns_lookup (const char *name,
&& grub_get_time_ms () < dns_cache[h].limit_time)
{
grub_dprintf ("dns", "retrieved from cache\n");
*addresses = grub_malloc (dns_cache[h].naddresses
* sizeof ((*addresses)[0]));
*addresses = grub_calloc (dns_cache[h].naddresses,
sizeof ((*addresses)[0]));
if (!*addresses)
return grub_errno;
*naddresses = dns_cache[h].naddresses;

4
grub-core/net/net.c
View File

@ -88,8 +88,8 @@ grub_net_link_layer_add_address (struct grub_net_card *card,
/* Add sender to cache table. */
if (card->link_layer_table == NULL)
{
card->link_layer_table = grub_zalloc (LINK_LAYER_CACHE_SIZE
* sizeof (card->link_layer_table[0]));
card->link_layer_table = grub_calloc (LINK_LAYER_CACHE_SIZE,
sizeof (card->link_layer_table[0]));
if (card->link_layer_table == NULL)
return;
}