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| author | Elena Reshetova <elena.reshetova@intel.com> | 2017-03-31 15:20:49 +0300 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2017-04-03 10:49:06 +1000 |
| commit | ddb99e118e37f324a4be65a411bb60ae62795cf9 (patch) | |
| tree | 9fecb40084bb937fafa04eaf57d9bc4ae3bcb6a9 /security/keys/proc.c | |
| parent | fff292914d3a2f1efd05ca71c2ba72a3c663201e (diff) | |
| download | linux-ddb99e118e37f324a4be65a411bb60ae62795cf9.tar.gz linux-ddb99e118e37f324a4be65a411bb60ae62795cf9.tar.bz2 linux-ddb99e118e37f324a4be65a411bb60ae62795cf9.zip | |
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/proc.c')
| -rw-r--r-- | security/keys/proc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/security/keys/proc.c b/security/keys/proc.c index 69199f18bfb3..bf08d02b6646 100644 --- a/security/keys/proc.c +++ b/security/keys/proc.c @@ -340,7 +340,7 @@ static int proc_key_users_show(struct seq_file *m, void *v) seq_printf(m, "%5u: %5d %d/%d %d/%d %d/%d\n", from_kuid_munged(seq_user_ns(m), user->uid), - atomic_read(&user->usage), + refcount_read(&user->usage), atomic_read(&user->nkeys), atomic_read(&user->nikeys), user->qnkeys, |