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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/lib/libgcrypt/cipher/pubkey.c
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@ -2941,7 +2941,7 @@ gcry_pk_encrypt (gcry_sexp_t *r_ciph, gcry_sexp_t s_data, gcry_sexp_t s_pkey)
* array to a format string, so we have to do it this way :-(. */
/* FIXME: There is now such a format specifier, so we can
change the code to be more clear. */
arg_list = malloc (nelem * sizeof *arg_list);
arg_list = calloc (nelem, sizeof *arg_list);
if (!arg_list)
{
rc = gpg_err_code_from_syserror ();
@ -3233,7 +3233,7 @@ gcry_pk_sign (gcry_sexp_t *r_sig, gcry_sexp_t s_hash, gcry_sexp_t s_skey)
}
strcpy (p, "))");
arg_list = malloc (nelem * sizeof *arg_list);
arg_list = calloc (nelem, sizeof *arg_list);
if (!arg_list)
{
rc = gpg_err_code_from_syserror ();