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| author | Eric Biggers <ebiggers@google.com> | 2017-06-08 14:48:03 +0100 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2017-06-09 13:29:46 +1000 |
| commit | d636bd9f12a66ea3775c9fabbf3f8e118253467a (patch) | |
| tree | d2242b7934d34bd2e6779e5d2061a0ed5ce216cc /security | |
| parent | 41f1c53e0d7d6e79087d5f5e18c467747126a3fc (diff) | |
| download | linux-0-day-d636bd9f12a66ea3775c9fabbf3f8e118253467a.tar.gz linux-0-day-d636bd9f12a66ea3775c9fabbf3f8e118253467a.tar.xz | |
KEYS: put keyring if install_session_keyring_to_cred() fails
In join_session_keyring(), if install_session_keyring_to_cred() were to
fail, we would leak the keyring reference, just like in the bug fixed by
commit 23567fd052a9 ("KEYS: Fix keyring ref leak in
join_session_keyring()"). Fortunately this cannot happen currently, but
we really should be more careful. Do this by adding and using a new
error label at which the keyring reference is dropped.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/keys/process_keys.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c index 2217dfec79961..86bced9fdbdf2 100644 --- a/security/keys/process_keys.c +++ b/security/keys/process_keys.c @@ -809,15 +809,14 @@ long join_session_keyring(const char *name) ret = PTR_ERR(keyring); goto error2; } else if (keyring == new->session_keyring) { - key_put(keyring); ret = 0; - goto error2; + goto error3; } /* we've got a keyring - now to install it */ ret = install_session_keyring_to_cred(new, keyring); if (ret < 0) - goto error2; + goto error3; commit_creds(new); mutex_unlock(&key_session_mutex); @@ -827,6 +826,8 @@ long join_session_keyring(const char *name) okay: return ret; +error3: + key_put(keyring); error2: mutex_unlock(&key_session_mutex); error: |