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authorElena Reshetova <elena.reshetova@intel.com>2017-03-31 15:20:49 +0300
committerJames Morris <james.l.morris@oracle.com>2017-04-03 03:49:06 +0300
commitddb99e118e37f324a4be65a411bb60ae62795cf9 (patch)
tree9fecb40084bb937fafa04eaf57d9bc4ae3bcb6a9 /security/keys/process_keys.c
parentfff292914d3a2f1efd05ca71c2ba72a3c663201e (diff)
downloadlinux-ddb99e118e37f324a4be65a411bb60ae62795cf9.tar.xz
security, keys: convert key_user.usage from atomic_t to refcount_t
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> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'security/keys/process_keys.c')
-rw-r--r--security/keys/process_keys.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index b6fdd22205b1..44451af828c0 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -30,7 +30,7 @@ static DEFINE_MUTEX(key_user_keyring_mutex);
/* The root user's tracking struct */
struct key_user root_key_user = {
- .usage = ATOMIC_INIT(3),
+ .usage = REFCOUNT_INIT(3),
.cons_lock = __MUTEX_INITIALIZER(root_key_user.cons_lock),
.lock = __SPIN_LOCK_UNLOCKED(root_key_user.lock),
.nkeys = ATOMIC_INIT(2),