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authorJohn Johansen <john.johansen@canonical.com>2013-02-19 04:04:34 +0400
committerJohn Johansen <john.johansen@canonical.com>2013-04-28 11:36:09 +0400
commit0ca554b9fca425eb58325a36290deef698cef34b (patch)
treeaa9cd7544db53f617f8bf6b0e441f97a55ed4181 /security
parent3cfcc19e0b5390c04cb5bfa4e8fde39395410e61 (diff)
downloadlinux-0ca554b9fca425eb58325a36290deef698cef34b.tar.xz
apparmor: add kvzalloc to handle zeroing for kvmalloc
Signed-off-by: John Johansen <john.johansen@canonical.com> Acked-by: Steve Beattie <sbeattie@ubuntu.com>
Diffstat (limited to 'security')
-rw-r--r--security/apparmor/include/apparmor.h12
-rw-r--r--security/apparmor/lib.c14
-rw-r--r--security/apparmor/match.c4
3 files changed, 22 insertions, 8 deletions
diff --git a/security/apparmor/include/apparmor.h b/security/apparmor/include/apparmor.h
index 40aedd9f73ea..1ba2ca56a6ef 100644
--- a/security/apparmor/include/apparmor.h
+++ b/security/apparmor/include/apparmor.h
@@ -15,6 +15,7 @@
#ifndef __APPARMOR_H
#define __APPARMOR_H
+#include <linux/slab.h>
#include <linux/fs.h>
#include "match.h"
@@ -64,9 +65,18 @@ extern int apparmor_initialized __initdata;
/* fn's in lib */
char *aa_split_fqname(char *args, char **ns_name);
void aa_info_message(const char *str);
-void *kvmalloc(size_t size);
+void *__aa_kvmalloc(size_t size, gfp_t flags);
void kvfree(void *buffer);
+static inline void *kvmalloc(size_t size)
+{
+ return __aa_kvmalloc(size, 0);
+}
+
+static inline void *kvzalloc(size_t size)
+{
+ return __aa_kvmalloc(size, __GFP_ZERO);
+}
/**
* aa_strneq - compare null terminated @str to a non null terminated substring
diff --git a/security/apparmor/lib.c b/security/apparmor/lib.c
index 7430298116d6..d6e1f2148398 100644
--- a/security/apparmor/lib.c
+++ b/security/apparmor/lib.c
@@ -75,15 +75,16 @@ void aa_info_message(const char *str)
}
/**
- * kvmalloc - do allocation preferring kmalloc but falling back to vmalloc
- * @size: size of allocation
+ * __aa_kvmalloc - do allocation preferring kmalloc but falling back to vmalloc
+ * @size: how many bytes of memory are required
+ * @flags: the type of memory to allocate (see kmalloc).
*
* Return: allocated buffer or NULL if failed
*
* It is possible that policy being loaded from the user is larger than
* what can be allocated by kmalloc, in those cases fall back to vmalloc.
*/
-void *kvmalloc(size_t size)
+void *__aa_kvmalloc(size_t size, gfp_t flags)
{
void *buffer = NULL;
@@ -92,14 +93,17 @@ void *kvmalloc(size_t size)
/* do not attempt kmalloc if we need more than 16 pages at once */
if (size <= (16*PAGE_SIZE))
- buffer = kmalloc(size, GFP_NOIO | __GFP_NOWARN);
+ buffer = kmalloc(size, flags | GFP_NOIO | __GFP_NOWARN);
if (!buffer) {
/* see kvfree for why size must be at least work_struct size
* when allocated via vmalloc
*/
if (size < sizeof(struct work_struct))
size = sizeof(struct work_struct);
- buffer = vmalloc(size);
+ if (flags & __GFP_ZERO)
+ buffer = vzalloc(size);
+ else
+ buffer = vmalloc(size);
}
return buffer;
}
diff --git a/security/apparmor/match.c b/security/apparmor/match.c
index 90971a8c3789..dfd25a9c9a69 100644
--- a/security/apparmor/match.c
+++ b/security/apparmor/match.c
@@ -30,7 +30,7 @@
*
* Returns: pointer to table else NULL on failure
*
- * NOTE: must be freed by kvfree (not kmalloc)
+ * NOTE: must be freed by kvfree (not kfree)
*/
static struct table_header *unpack_table(char *blob, size_t bsize)
{
@@ -57,7 +57,7 @@ static struct table_header *unpack_table(char *blob, size_t bsize)
if (bsize < tsize)
goto out;
- table = kvmalloc(tsize);
+ table = kvzalloc(tsize);
if (table) {
*table = th;
if (th.td_flags == YYTD_DATA8)