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selinux: convert to kvmalloc

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The flex arrays were being used for constant sized arrays, so there's no
benefit to using flex_arrays over something simpler.

Link: http://lkml.kernel.org/r/20181217131929.11727-4-kent.overstreet@gmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Pravin B Shelar <pshelar@ovn.org>
Cc: Shaohua Li <shli@kernel.org>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kent Overstreet
2019-03-11 23:31:10 -07:00
committed by Linus Torvalds
parent b330e6a49d
commit acdf52d97f
6 changed files with 62 additions and 144 deletions
Download Patch File Download Diff File Expand all files Collapse all files

122
security/selinux/ss/policydb.c
View File

@@ -36,7 +36,6 @@
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/audit.h>
#include <linux/flex_array.h>
#include "security.h"
#include "policydb.h"
@@ -341,17 +340,14 @@ static int common_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct common_datum *comdatum;
struct flex_array *fa;
comdatum = datum;
p = datap;
if (!comdatum->value || comdatum->value > p->p_commons.nprim)
return -EINVAL;
fa = p->sym_val_to_name[SYM_COMMONS];
if (flex_array_put_ptr(fa, comdatum->value - 1, key,
GFP_KERNEL | __GFP_ZERO))
BUG();
p->sym_val_to_name[SYM_COMMONS][comdatum->value - 1] = key;
return 0;
}
@@ -359,16 +355,13 @@ static int class_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct class_datum *cladatum;
struct flex_array *fa;
cladatum = datum;
p = datap;
if (!cladatum->value || cladatum->value > p->p_classes.nprim)
return -EINVAL;
fa = p->sym_val_to_name[SYM_CLASSES];
if (flex_array_put_ptr(fa, cladatum->value - 1, key,
GFP_KERNEL | __GFP_ZERO))
BUG();
p->sym_val_to_name[SYM_CLASSES][cladatum->value - 1] = key;
p->class_val_to_struct[cladatum->value - 1] = cladatum;
return 0;
}
@@ -377,7 +370,6 @@ static int role_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct role_datum *role;
struct flex_array *fa;
role = datum;
p = datap;
@@ -386,10 +378,7 @@ static int role_index(void *key, void *datum, void *datap)
|| role->bounds > p->p_roles.nprim)
return -EINVAL;
fa = p->sym_val_to_name[SYM_ROLES];
if (flex_array_put_ptr(fa, role->value - 1, key,
GFP_KERNEL | __GFP_ZERO))
BUG();
p->sym_val_to_name[SYM_ROLES][role->value - 1] = key;
p->role_val_to_struct[role->value - 1] = role;
return 0;
}
@@ -398,7 +387,6 @@ static int type_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct type_datum *typdatum;
struct flex_array *fa;
typdatum = datum;
p = datap;
@@ -408,15 +396,8 @@ static int type_index(void *key, void *datum, void *datap)
|| typdatum->value > p->p_types.nprim
|| typdatum->bounds > p->p_types.nprim)
return -EINVAL;
fa = p->sym_val_to_name[SYM_TYPES];
if (flex_array_put_ptr(fa, typdatum->value - 1, key,
GFP_KERNEL | __GFP_ZERO))
BUG();
fa = p->type_val_to_struct_array;
if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
GFP_KERNEL | __GFP_ZERO))
BUG();
p->sym_val_to_name[SYM_TYPES][typdatum->value - 1] = key;
p->type_val_to_struct_array[typdatum->value - 1] = typdatum;
}
return 0;
@@ -426,7 +407,6 @@ static int user_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct user_datum *usrdatum;
struct flex_array *fa;
usrdatum = datum;
p = datap;
@@ -435,10 +415,7 @@ static int user_index(void *key, void *datum, void *datap)
|| usrdatum->bounds > p->p_users.nprim)
return -EINVAL;
fa = p->sym_val_to_name[SYM_USERS];
if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
GFP_KERNEL | __GFP_ZERO))
BUG();
p->sym_val_to_name[SYM_USERS][usrdatum->value - 1] = key;
p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
return 0;
}
@@ -447,7 +424,6 @@ static int sens_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct level_datum *levdatum;
struct flex_array *fa;
levdatum = datum;
p = datap;
@@ -456,10 +432,8 @@ static int sens_index(void *key, void *datum, void *datap)
if (!levdatum->level->sens ||
levdatum->level->sens > p->p_levels.nprim)
return -EINVAL;
fa = p->sym_val_to_name[SYM_LEVELS];
if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
GFP_KERNEL | __GFP_ZERO))
BUG();
p->sym_val_to_name[SYM_LEVELS][levdatum->level->sens - 1] = key;
}
return 0;
@@ -469,7 +443,6 @@ static int cat_index(void *key, void *datum, void *datap)
{
struct policydb *p;
struct cat_datum *catdatum;
struct flex_array *fa;
catdatum = datum;
p = datap;
@@ -477,10 +450,8 @@ static int cat_index(void *key, void *datum, void *datap)
if (!catdatum->isalias) {
if (!catdatum->value || catdatum->value > p->p_cats.nprim)
return -EINVAL;
fa = p->sym_val_to_name[SYM_CATS];
if (flex_array_put_ptr(fa, catdatum->value - 1, key,
GFP_KERNEL | __GFP_ZERO))
BUG();
p->sym_val_to_name[SYM_CATS][catdatum->value - 1] = key;
}
return 0;
@@ -568,35 +539,23 @@ static int policydb_index(struct policydb *p)
if (!p->user_val_to_struct)
return -ENOMEM;
/* Yes, I want the sizeof the pointer, not the structure */
p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
p->p_types.nprim,
GFP_KERNEL | __GFP_ZERO);
p->type_val_to_struct_array = kvcalloc(p->p_types.nprim,
sizeof(*p->type_val_to_struct_array),
GFP_KERNEL);
if (!p->type_val_to_struct_array)
return -ENOMEM;
rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
if (rc)
goto out;
rc = cond_init_bool_indexes(p);
if (rc)
goto out;
for (i = 0; i < SYM_NUM; i++) {
p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
p->symtab[i].nprim,
GFP_KERNEL | __GFP_ZERO);
p->sym_val_to_name[i] = kvcalloc(p->symtab[i].nprim,
sizeof(char *),
GFP_KERNEL);
if (!p->sym_val_to_name[i])
return -ENOMEM;
rc = flex_array_prealloc(p->sym_val_to_name[i],
0, p->symtab[i].nprim,
GFP_KERNEL | __GFP_ZERO);
if (rc)
goto out;
rc = hashtab_map(p->symtab[i].table, index_f[i], p);
if (rc)
goto out;
@@ -810,16 +769,13 @@ void policydb_destroy(struct policydb *p)
hashtab_destroy(p->symtab[i].table);
}
for (i = 0; i < SYM_NUM; i++) {
if (p->sym_val_to_name[i])
flex_array_free(p->sym_val_to_name[i]);
}
for (i = 0; i < SYM_NUM; i++)
kvfree(p->sym_val_to_name[i]);
kfree(p->class_val_to_struct);
kfree(p->role_val_to_struct);
kfree(p->user_val_to_struct);
if (p->type_val_to_struct_array)
flex_array_free(p->type_val_to_struct_array);
kvfree(p->type_val_to_struct_array);
avtab_destroy(&p->te_avtab);
@@ -872,17 +828,9 @@ void policydb_destroy(struct policydb *p)
hashtab_map(p->range_tr, range_tr_destroy, NULL);
hashtab_destroy(p->range_tr);
if (p->type_attr_map_array) {
for (i = 0; i < p->p_types.nprim; i++) {
struct ebitmap *e;
e = flex_array_get(p->type_attr_map_array, i);
if (!e)
continue;
ebitmap_destroy(e);
}
flex_array_free(p->type_attr_map_array);
}
for (i = 0; i < p->p_types.nprim; i++)
ebitmap_destroy(&p->type_attr_map_array[i]);
kvfree(p->type_attr_map_array);
ebitmap_destroy(&p->filename_trans_ttypes);
ebitmap_destroy(&p->policycaps);
@@ -1770,8 +1718,7 @@ static int type_bounds_sanity_check(void *key, void *datum, void *datap)
return -EINVAL;
}
upper = flex_array_get_ptr(p->type_val_to_struct_array,
upper->bounds - 1);
upper = p->type_val_to_struct_array[upper->bounds - 1];
BUG_ON(!upper);
if (upper->attribute) {
@@ -2543,23 +2490,15 @@ int policydb_read(struct policydb *p, void *fp)
if (rc)
goto bad;
rc = -ENOMEM;
p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
p->p_types.nprim,
GFP_KERNEL | __GFP_ZERO);
p->type_attr_map_array = kvcalloc(p->p_types.nprim,
sizeof(*p->type_attr_map_array),
GFP_KERNEL);
if (!p->type_attr_map_array)
goto bad;
/* preallocate so we don't have to worry about the put ever failing */
rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
GFP_KERNEL | __GFP_ZERO);
if (rc)
goto bad;
for (i = 0; i < p->p_types.nprim; i++) {
struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
struct ebitmap *e = &p->type_attr_map_array[i];
BUG_ON(!e);
ebitmap_init(e);
if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
rc = ebitmap_read(e, fp);
@@ -3554,9 +3493,8 @@ int policydb_write(struct policydb *p, void *fp)
return rc;
for (i = 0; i < p->p_types.nprim; i++) {
struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
struct ebitmap *e = &p->type_attr_map_array[i];
BUG_ON(!e);
rc = ebitmap_write(e, fp);
if (rc)
return rc;