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calloc: Use calloc() at most places

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This modifies most of the places we do some form of:

  X = malloc(Y * Z);

to use calloc(Y, Z) instead.

Among other issues, this fixes:
  - allocation of integer overflow in grub_png_decode_image_header()
    reported by Chris Coulson,
  - allocation of integer overflow in luks_recover_key()
    reported by Chris Coulson,
  - allocation of integer overflow in grub_lvm_detect()
    reported by Chris Coulson.

Fixes: CVE-2020-14308

Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Peter Jones 2020-06-15 12:26:01 -04:00 • committed by Daniel Kiper
parent 64e26162eb
commit f725fa7cb2
87 changed files with 179 additions and 178 deletions
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3
grub-core/font/font.c
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@ -293,8 +293,7 @@ load_font_index (grub_file_t file, grub_uint32_t sect_length, struct
font->num_chars = sect_length / FONT_CHAR_INDEX_ENTRY_SIZE;
/* Allocate the character index array. */
font->char_index = grub_malloc (font->num_chars
* sizeof (struct char_index_entry));
font->char_index = grub_calloc (font->num_chars, sizeof (struct char_index_entry));
if (!font->char_index)
return 1;
font->bmp_idx = grub_malloc (0x10000 * sizeof (grub_uint16_t));