From: Randy Dunlap <[email protected]>
Add more poison values to include/linux/poison.h.
It's not clear to me whether some others should be added or not,
so I haven't added any of these:
./include/linux/libata.h:#define ATA_TAG_POISON 0xfafbfcfdU
./arch/ppc/8260_io/fcc_enet.c:1918: memset((char *)(&(immap->im_dprambase[(mem_addr+64)])), 0x88, 32);
./drivers/usb/mon/mon_text.c:429: memset(mem, 0xe5, sizeof(struct mon_event_text));
./drivers/char/ftape/lowlevel/ftape-ctl.c:738: memset(ft_buffer[i]->address, 0xAA, FT_BUFF_SIZE);
./drivers/block/sx8.c:/* 0xf is just arbitrary, non-zero noise; this is sorta like poisoning */
Signed-off-by: Randy Dunlap <[email protected]>
---
include/linux/poison.h | 7 +++++++
kernel/mutex-debug.c | 5 +++--
security/keys/key.c | 3 ++-
3 files changed, 12 insertions(+), 3 deletions(-)
--- linux-2617-rc5mm3.orig/include/linux/poison.h
+++ linux-2617-rc5mm3/include/linux/poison.h
@@ -45,6 +45,13 @@
/********** drivers/atm/ **********/
#define ATM_POISON_FREE 0x12
+/********** kernel/mutexes **********/
+#define MUTEX_DEBUG_INIT 0x11
+#define MUTEX_DEBUG_FREE 0x22
+
+/********** security/ **********/
+#define KEY_DESTROY 0xbd
+
/********** sound/oss/ **********/
#define OSS_POISON_FREE 0xAB
--- linux-2617-rc5mm3.orig/kernel/mutex-debug.c
+++ linux-2617-rc5mm3/kernel/mutex-debug.c
@@ -16,6 +16,7 @@
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/module.h>
+#include <linux/poison.h>
#include <linux/spinlock.h>
#include <linux/kallsyms.h>
#include <linux/interrupt.h>
@@ -155,7 +156,7 @@ void debug_mutex_set_owner(struct mutex
void debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter)
{
- memset(waiter, 0x11, sizeof(*waiter));
+ memset(waiter, MUTEX_DEBUG_INIT, sizeof(*waiter));
waiter->magic = waiter;
INIT_LIST_HEAD(&waiter->list);
}
@@ -171,7 +172,7 @@ void debug_mutex_wake_waiter(struct mute
void debug_mutex_free_waiter(struct mutex_waiter *waiter)
{
DEBUG_WARN_ON(!list_empty(&waiter->list));
- memset(waiter, 0x22, sizeof(*waiter));
+ memset(waiter, MUTEX_DEBUG_FREE, sizeof(*waiter));
}
void debug_mutex_add_waiter(struct mutex *lock, struct mutex_waiter *waiter,
--- linux-2617-rc5mm3.orig/security/keys/key.c
+++ linux-2617-rc5mm3/security/keys/key.c
@@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/poison.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/security.h>
@@ -986,7 +987,7 @@ void unregister_key_type(struct key_type
if (key->type == ktype) {
if (ktype->destroy)
ktype->destroy(key);
- memset(&key->payload, 0xbd, sizeof(key->payload));
+ memset(&key->payload, KEY_DESTROY, sizeof(key->payload));
}
}
---
-
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