diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2015-12-10 00:57:58 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2015-12-10 00:57:58 -0500 |
| commit | db7730e3091a52c2fcd8fcc952b964d88998e675 (patch) | |
| tree | 519a9fefb48bc62866dc0923e408f949220089cf /fs/ext4/crypto_key.c | |
| parent | ba5843f51d468644b094674c0317c9ab95632caa (diff) | |
ext4 crypto: add missing locking for keyring_key access
Cc: stable@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/crypto_key.c')
| -rw-r--r-- | fs/ext4/crypto_key.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext4/crypto_key.c b/fs/ext4/crypto_key.c index c5882b36e558..9a16d1e75a49 100644 --- a/fs/ext4/crypto_key.c +++ b/fs/ext4/crypto_key.c @@ -213,9 +213,11 @@ retry: res = -ENOKEY; goto out; } + down_read(&keyring_key->sem); ukp = user_key_payload(keyring_key); if (ukp->datalen != sizeof(struct ext4_encryption_key)) { res = -EINVAL; + up_read(&keyring_key->sem); goto out; } master_key = (struct ext4_encryption_key *)ukp->data; @@ -226,10 +228,12 @@ retry: "ext4: key size incorrect: %d\n", master_key->size); res = -ENOKEY; + up_read(&keyring_key->sem); goto out; } res = ext4_derive_key_aes(ctx.nonce, master_key->raw, raw_key); + up_read(&keyring_key->sem); if (res) goto out; got_key: |