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* grub-core/kern/efi/mm.c (grub_efi_get_memory_map): Never return a 

descriptor_size==0 to avoid potential divisions by zero.
This commit is contained in:
Vladimir Serbinenko 2015-01-21 10:17:36 +01:00
parent ac8bac2496
commit 69aee43fa6
2 changed files with 10 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2015-01-20 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/kern/efi/mm.c (grub_efi_get_memory_map): Never return a
descriptor_size==0 to avoid potential divisions by zero.
2015-01-20 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/osdep/haiku/getroot.c (grub_util_find_partition_start_os):

5
grub-core/kern/efi/mm.c
View File

@ -230,6 +230,7 @@ grub_efi_get_memory_map (grub_efi_uintn_t *memory_map_size,
grub_efi_boot_services_t *b;
grub_efi_uintn_t key;
grub_efi_uint32_t version;
grub_efi_uintn_t size;
if (grub_efi_is_finished)
{
@ -259,10 +260,14 @@ grub_efi_get_memory_map (grub_efi_uintn_t *memory_map_size,
map_key = &key;
if (! descriptor_version)
descriptor_version = &version;
if (! descriptor_size)
descriptor_size = &size;
b = grub_efi_system_table->boot_services;
status = efi_call_5 (b->get_memory_map, memory_map_size, memory_map, map_key,
descriptor_size, descriptor_version);
if (*descriptor_size == 0)
*descriptor_size = sizeof (grub_efi_memory_descriptor_t);
if (status == GRUB_EFI_SUCCESS)
return 1;
else if (status == GRUB_EFI_BUFFER_TOO_SMALL)