system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-11-03 01:56:01 +00:00
Code Issues Projects Releases Packages Wiki Activity

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6

Browse source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  flex_arrays: allow zero length flex arrays
  flex_array: flex_array_prealloc takes a number of elements, not an end
  SELinux: pass last path component in may_create
This commit is contained in:
Linus Torvalds 2011-05-04 14:21:08 -07:00
commit 8a3d8ed027
5 changed files with 26 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
Documentation/flexible-arrays.txt
View file

@ -66,10 +66,10 @@ trick is to ensure that any needed memory allocations are done before
entering atomic context, using:
int flex_array_prealloc(struct flex_array *array, unsigned int start,
unsigned int end, gfp_t flags);
unsigned int nr_elements, gfp_t flags);
This function will ensure that memory for the elements indexed in the range
defined by start and end has been allocated. Thereafter, a
defined by start and nr_elements has been allocated. Thereafter, a
flex_array_put() call on an element in that range is guaranteed not to
block.

2
include/linux/flex_array.h
View file

@ -61,7 +61,7 @@ struct flex_array {
struct flex_array *flex_array_alloc(int element_size, unsigned int total,
gfp_t flags);
int flex_array_prealloc(struct flex_array *fa, unsigned int start,
unsigned int end, gfp_t flags);
unsigned int nr_elements, gfp_t flags);
void flex_array_free(struct flex_array *fa);
void flex_array_free_parts(struct flex_array *fa);
int flex_array_put(struct flex_array *fa, unsigned int element_nr, void *src,

24
lib/flex_array.c
View file

@ -232,10 +232,10 @@ EXPORT_SYMBOL(flex_array_clear);
/**
* flex_array_prealloc - guarantee that array space exists
* @fa: the flex array for which to preallocate parts
* @start: index of first array element for which space is allocated
* @end: index of last (inclusive) element for which space is allocated
* @flags: page allocation flags
* @fa: the flex array for which to preallocate parts
* @start: index of first array element for which space is allocated
* @nr_elements: number of elements for which space is allocated
* @flags: page allocation flags
*
* This will guarantee that no future calls to flex_array_put()
* will allocate memory. It can be used if you are expecting to
@ -245,14 +245,24 @@ EXPORT_SYMBOL(flex_array_clear);
* Locking must be provided by the caller.
*/
int flex_array_prealloc(struct flex_array *fa, unsigned int start,
unsigned int end, gfp_t flags)
unsigned int nr_elements, gfp_t flags)
{
int start_part;
int end_part;
int part_nr;
unsigned int end;
struct flex_array_part *part;
if (start >= fa->total_nr_elements || end >= fa->total_nr_elements)
if (!start && !nr_elements)
return 0;
if (start >= fa->total_nr_elements)
return -ENOSPC;
if (!nr_elements)
return 0;
end = start + nr_elements - 1;
if (end >= fa->total_nr_elements)
return -ENOSPC;
if (elements_fit_in_base(fa))
return 0;
@ -343,6 +353,8 @@ int flex_array_shrink(struct flex_array *fa)
int part_nr;
int ret = 0;
if (!fa->total_nr_elements)
return 0;
if (elements_fit_in_base(fa))
return ret;
for (part_nr = 0; part_nr < FLEX_ARRAY_NR_BASE_PTRS; part_nr++) {

3
security/selinux/hooks.c
View file

@ -1578,7 +1578,8 @@ static int may_create(struct inode *dir,
return rc;
if (!newsid || !(sbsec->flags & SE_SBLABELSUPP)) {
rc = security_transition_sid(sid, dsec->sid, tclass, NULL, &newsid);
rc = security_transition_sid(sid, dsec->sid, tclass,
&dentry->d_name, &newsid);
if (rc)
return rc;
}

6
security/selinux/ss/policydb.c
View file

@ -502,7 +502,7 @@ static int policydb_index(struct policydb *p)
goto out;
rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
p->p_types.nprim - 1, GFP_KERNEL | __GFP_ZERO);
p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
if (rc)
goto out;
@ -519,7 +519,7 @@ static int policydb_index(struct policydb *p)
goto out;
rc = flex_array_prealloc(p->sym_val_to_name[i],
0, p->symtab[i].nprim - 1,
0, p->symtab[i].nprim,
GFP_KERNEL | __GFP_ZERO);
if (rc)
goto out;
@ -2375,7 +2375,7 @@ int policydb_read(struct policydb *p, void *fp)
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 - 1,
rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
GFP_KERNEL | __GFP_ZERO);
if (rc)
goto bad;