Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752362AbcLFW6B (ORCPT ); Tue, 6 Dec 2016 17:58:01 -0500 Received: from mail.sigma-star.at ([95.130.255.111]:45998 "EHLO mail.sigma-star.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751372AbcLFW42 (ORCPT ); Tue, 6 Dec 2016 17:56:28 -0500 From: David Gstir To: linux-mtd@lists.infradead.org Cc: tytso@mit.edu, dedekind1@gmail.com, ebiggers@google.com, mhalcrow@google.com, adrian.hunter@intel.com, linux-kernel@vger.kernel.org, hch@infradead.org, linux-fsdevel@vger.kernel.org, jaegeuk@kernel.org, dengler@linutronix.de, sbabic@denx.de, wd@denx.de, richard@nod.at, David Gstir Subject: [PATCH v2 2/6] fscrypt: Never allocate fscrypt_ctx on in-place encryption Date: Tue, 6 Dec 2016 23:53:54 +0100 Message-Id: <20161206225358.12126-3-david@sigma-star.at> X-Mailer: git-send-email 2.10.1 In-Reply-To: <20161206225358.12126-1-david@sigma-star.at> References: <20161206225358.12126-1-david@sigma-star.at> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2085 Lines: 65 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 --- fs/crypto/crypto.c | 30 +++++++++++++++++++----------- 1 file changed, 19 insertions(+), 11 deletions(-) diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c index 3c1124beae28..8536ac0b50d3 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: -- 2.10.1