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| author | David Gstir <david@sigma-star.at> | 2016-12-06 23:53:54 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-12-11 16:26:11 -0500 |
| commit | 9e532772b4e36888584efc7a9531143bd43355b3 (patch) | |
| tree | e4e9e4f064c79751cfcd8cb820e985474ff81109 /fs/crypto | |
| parent | e550c16c8aab95c7996b0c864d5fcedc2c430a43 (diff) | |
| download | linux-9e532772b4e36888584efc7a9531143bd43355b3.tar.gz linux-9e532772b4e36888584efc7a9531143bd43355b3.tar.bz2 linux-9e532772b4e36888584efc7a9531143bd43355b3.zip | |
fscrypt: Never allocate fscrypt_ctx on in-place encryption
In case of in-place encryption fscrypt_ctx was allocated but never
released. Since we don't need it for in-place encryption, we skip
allocating it.
Fixes: 1c7dcf69eea3 ("fscrypt: Add in-place encryption mode")
Signed-off-by: David Gstir <david@sigma-star.at>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/crypto')
| -rw-r--r-- | fs/crypto/crypto.c | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c index d19a42f3a983..f287f76cc906 100644 --- a/fs/crypto/crypto.c +++ b/fs/crypto/crypto.c @@ -246,16 +246,26 @@ struct page *fscrypt_encrypt_page(const struct inode *inode, BUG_ON(plaintext_len % FS_CRYPTO_BLOCK_SIZE != 0); + if (inode->i_sb->s_cop->flags & FS_CFLG_INPLACE_ENCRYPTION) { + /* with inplace-encryption we just encrypt the page */ + err = do_page_crypto(inode, FS_ENCRYPT, index, + plaintext_page, ciphertext_page, + plaintext_len, plaintext_offset, + gfp_flags); + if (err) + return ERR_PTR(err); + + return ciphertext_page; + } + ctx = fscrypt_get_ctx(inode, gfp_flags); if (IS_ERR(ctx)) return (struct page *)ctx; - if (!(inode->i_sb->s_cop->flags & FS_CFLG_INPLACE_ENCRYPTION)) { - /* The encryption operation will require a bounce page. */ - ciphertext_page = alloc_bounce_page(ctx, gfp_flags); - if (IS_ERR(ciphertext_page)) - goto errout; - } + /* The encryption operation will require a bounce page. */ + ciphertext_page = alloc_bounce_page(ctx, gfp_flags); + if (IS_ERR(ciphertext_page)) + goto errout; ctx->w.control_page = plaintext_page; err = do_page_crypto(inode, FS_ENCRYPT, index, @@ -266,11 +276,9 @@ struct page *fscrypt_encrypt_page(const struct inode *inode, ciphertext_page = ERR_PTR(err); goto errout; } - if (!(inode->i_sb->s_cop->flags & FS_CFLG_INPLACE_ENCRYPTION)) { - SetPagePrivate(ciphertext_page); - set_page_private(ciphertext_page, (unsigned long)ctx); - lock_page(ciphertext_page); - } + SetPagePrivate(ciphertext_page); + set_page_private(ciphertext_page, (unsigned long)ctx); + lock_page(ciphertext_page); return ciphertext_page; errout: |