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selinux: Use kmalloc_array() in cond_init_bool_indexes()

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* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "kmalloc_array".

  This issue was detected by using the Coccinelle software.

* Replace the specification of a data type by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Markus Elfring 2017-01-14 10:48:28 +01:00 committed by Paul Moore
parent e2f586bd83
commit f6076f704a
1 changed files with 3 additions and 2 deletions
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security/selinux/ss/conditional.c
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@ -176,8 +176,9 @@ void cond_policydb_destroy(struct policydb *p)
int cond_init_bool_indexes(struct policydb *p) int cond_init_bool_indexes(struct policydb *p)
{ {
kfree(p->bool_val_to_struct); kfree(p->bool_val_to_struct);
p->bool_val_to_struct = p->bool_val_to_struct = kmalloc_array(p->p_bools.nprim,
kmalloc(p->p_bools.nprim * sizeof(struct cond_bool_datum *), GFP_KERNEL); sizeof(*p->bool_val_to_struct),
GFP_KERNEL);
if (!p->bool_val_to_struct) if (!p->bool_val_to_struct)
return -ENOMEM; return -ENOMEM;
return 0; return 0;