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 23567fd052
("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>
This commit is contained in:
committed by
James Morris
parent
41f1c53e0d
commit
d636bd9f12
@@ -809,15 +809,14 @@ long join_session_keyring(const char *name)
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ret = PTR_ERR(keyring);
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ret = PTR_ERR(keyring);
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goto error2;
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goto error2;
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} else if (keyring == new->session_keyring) {
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} else if (keyring == new->session_keyring) {
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key_put(keyring);
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ret = 0;
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ret = 0;
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goto error2;
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goto error3;
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}
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}
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/* we've got a keyring - now to install it */
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/* we've got a keyring - now to install it */
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ret = install_session_keyring_to_cred(new, keyring);
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ret = install_session_keyring_to_cred(new, keyring);
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if (ret < 0)
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if (ret < 0)
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goto error2;
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goto error3;
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commit_creds(new);
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commit_creds(new);
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mutex_unlock(&key_session_mutex);
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mutex_unlock(&key_session_mutex);
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@@ -827,6 +826,8 @@ long join_session_keyring(const char *name)
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okay:
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okay:
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return ret;
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return ret;
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error3:
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key_put(keyring);
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error2:
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error2:
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mutex_unlock(&key_session_mutex);
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mutex_unlock(&key_session_mutex);
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error:
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error:
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