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| author | Elena Reshetova <elena.reshetova@intel.com> | 2017-03-31 15:20:48 +0300 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2017-04-03 10:49:05 +1000 |
| commit | fff292914d3a2f1efd05ca71c2ba72a3c663201e (patch) | |
| tree | 627f9870ad82da8f6f06cca86a73e3b7e2fc97d5 /security/keys/request_key_auth.c | |
| parent | 8291798dcf059cdc5e55a59b2c4ad70ae14508c2 (diff) | |
| download | linux-fff292914d3a2f1efd05ca71c2ba72a3c663201e.tar.bz2 | |
security, keys: convert key.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/request_key_auth.c')
| -rw-r--r-- | security/keys/request_key_auth.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c index 6bbe2f535f08..0f062156dfb2 100644 --- a/security/keys/request_key_auth.c +++ b/security/keys/request_key_auth.c @@ -213,7 +213,7 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info, if (ret < 0) goto error_inst; - kleave(" = {%d,%d}", authkey->serial, atomic_read(&authkey->usage)); + kleave(" = {%d,%d}", authkey->serial, refcount_read(&authkey->usage)); return authkey; auth_key_revoked: |