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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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4
grub-core/osdep/windows/hostdisk.c
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@ -111,7 +111,7 @@ grub_util_get_windows_path_real (const char *path)
while (1)
{
fpa = xmalloc (alloc * sizeof (fpa[0]));
fpa = xcalloc (alloc, sizeof (fpa[0]));
len = GetFullPathName (tpath, alloc, fpa, NULL);
if (len >= alloc)
@ -399,7 +399,7 @@ grub_util_fd_opendir (const char *name)
for (l = 0; name_windows[l]; l++);
for (l--; l >= 0 && (name_windows[l] == '\\' || name_windows[l] == '/'); l--);
l++;
pattern = xmalloc ((l + 3) * sizeof (pattern[0]));
pattern = xcalloc (l + 3, sizeof (pattern[0]));
memcpy (pattern, name_windows, l * sizeof (pattern[0]));
pattern[l] = '\\';
pattern[l + 1] = '*';