xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390: convert debug_info.ref_count from atomic_t to refcount_t

Browse Source 
refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Elena Reshetova
2017-03-02 12:23:45 +01:00
committed by Martin Schwidefsky
parent d04a4c76f7
commit efc0c21c9e
2 changed files with 6 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/s390/include/asm/debug.h
View File

@@ -10,6 +10,7 @@
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/time.h>
#include <linux/refcount.h>
#include <uapi/asm/debug.h>
#define DEBUG_MAX_LEVEL 6 /* debug levels range from 0 to 6 */
@@ -31,7 +32,7 @@ struct debug_view;
typedef struct debug_info {
struct debug_info* next;
struct debug_info* prev;
atomic_t ref_count;
refcount_t ref_count;
spinlock_t lock;
int level;
int nr_areas;