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authorCatalin Marinas <catalin.marinas@arm.com>2009-06-11 16:23:19 +0400
committerCatalin Marinas <catalin.marinas@arm.com>2009-06-11 20:03:30 +0400
commit89219d37a2377c44fde7bff0bf0623453c05329a (patch)
tree8183d7bb948f06868e3687b59336c8a99360ce7b /mm/vmalloc.c
parent06f22f13f3cc2eff00db09f053218e5d4b757bc8 (diff)
downloadlinux-89219d37a2377c44fde7bff0bf0623453c05329a.tar.xz
kmemleak: Add the vmalloc memory allocation/freeing hooks
This patch adds the callbacks to kmemleak_(alloc|free) functions from vmalloc/vfree. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'mm/vmalloc.c')
-rw-r--r--mm/vmalloc.c30
1 files changed, 27 insertions, 3 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 083716ea38c9..b7db93572797 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -25,6 +25,7 @@
#include <linux/rcupdate.h>
#include <linux/bootmem.h>
#include <linux/pfn.h>
+#include <linux/kmemleak.h>
#include <asm/atomic.h>
#include <asm/uaccess.h>
@@ -1327,6 +1328,9 @@ static void __vunmap(const void *addr, int deallocate_pages)
void vfree(const void *addr)
{
BUG_ON(in_interrupt());
+
+ kmemleak_free(addr);
+
__vunmap(addr, 1);
}
EXPORT_SYMBOL(vfree);
@@ -1439,8 +1443,17 @@ fail:
void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, pgprot_t prot)
{
- return __vmalloc_area_node(area, gfp_mask, prot, -1,
- __builtin_return_address(0));
+ void *addr = __vmalloc_area_node(area, gfp_mask, prot, -1,
+ __builtin_return_address(0));
+
+ /*
+ * A ref_count = 3 is needed because the vm_struct and vmap_area
+ * structures allocated in the __get_vm_area_node() function contain
+ * references to the virtual address of the vmalloc'ed block.
+ */
+ kmemleak_alloc(addr, area->size - PAGE_SIZE, 3, gfp_mask);
+
+ return addr;
}
/**
@@ -1459,6 +1472,8 @@ static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
int node, void *caller)
{
struct vm_struct *area;
+ void *addr;
+ unsigned long real_size = size;
size = PAGE_ALIGN(size);
if (!size || (size >> PAGE_SHIFT) > num_physpages)
@@ -1470,7 +1485,16 @@ static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
if (!area)
return NULL;
- return __vmalloc_area_node(area, gfp_mask, prot, node, caller);
+ addr = __vmalloc_area_node(area, gfp_mask, prot, node, caller);
+
+ /*
+ * A ref_count = 3 is needed because the vm_struct and vmap_area
+ * structures allocated in the __get_vm_area_node() function contain
+ * references to the virtual address of the vmalloc'ed block.
+ */
+ kmemleak_alloc(addr, real_size, 3, gfp_mask);
+
+ return addr;
}
void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)