linux/arch/x86/mm/kmemcheck/shadow.h
Catalin Marinas 81fc03909a kmemcheck: Test the full object in kmemcheck_is_obj_initialized()
This is a fix for bug #14845 (bugzilla.kernel.org). The update_checksum()
function in mm/kmemleak.c calls kmemcheck_is_obj_initialised() before scanning
an object. When KMEMCHECK_PARTIAL_OK is enabled, this function returns true.
However, the crc32_le() reads smaller intervals (32-bit) for which
kmemleak_is_obj_initialised() may be false leading to a kmemcheck warning.

Note that kmemcheck_is_obj_initialized() is currently only used by
kmemleak before scanning a memory location.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Christian Casteyde <casteyde.christian@free.fr>
Cc: Vegard Nossum <vegardno@ifi.uio.no>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2010-02-17 21:39:08 +02:00

19 lines
524 B
C

#ifndef ARCH__X86__MM__KMEMCHECK__SHADOW_H
#define ARCH__X86__MM__KMEMCHECK__SHADOW_H
enum kmemcheck_shadow {
KMEMCHECK_SHADOW_UNALLOCATED,
KMEMCHECK_SHADOW_UNINITIALIZED,
KMEMCHECK_SHADOW_INITIALIZED,
KMEMCHECK_SHADOW_FREED,
};
void *kmemcheck_shadow_lookup(unsigned long address);
enum kmemcheck_shadow kmemcheck_shadow_test(void *shadow, unsigned int size);
enum kmemcheck_shadow kmemcheck_shadow_test_all(void *shadow,
unsigned int size);
void kmemcheck_shadow_set(void *shadow, unsigned int size);
#endif