From bd4f0fe8bb7c73c738e1e11bc90d6e2cf9c6e20e Mon Sep 17 00:00:00 2001 From: Tyler Hicks Date: Wed, 23 Feb 2011 00:14:19 -0600 Subject: eCryptfs: Remove unnecessary grow_file() function When creating a new eCryptfs file, the crypto metadata is written out and then the lower file was being "grown" with 4 kB of encrypted zeroes. I suspect that growing the encrypted file was to prevent an information leak that the unencrypted file was empty. However, the unencrypted file size is stored, in plaintext, in the metadata so growing the file is unnecessary. Signed-off-by: Tyler Hicks --- fs/ecryptfs/crypto.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/ecryptfs/crypto.c') diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index bfd8b680e648..98a2a314ea68 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -1389,6 +1389,7 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry) rc = -ENOMEM; goto out; } + /* Zeroed page ensures the in-header unencrypted i_size is set to 0 */ rc = ecryptfs_write_headers_virt(virt, virt_len, &size, crypt_stat, ecryptfs_dentry); if (unlikely(rc)) { -- cgit v1.2.2 From cf35ca69131d5fc8febb74629d173e0731bf49c0 Mon Sep 17 00:00:00 2001 From: Roberto Sassu Date: Mon, 21 Mar 2011 16:00:51 +0100 Subject: eCryptfs: removed num_global_auth_toks from ecryptfs_mount_crypt_stat This patch removes the 'num_global_auth_toks' field of the ecryptfs_mount_crypt_stat structure, used to count the number of items in the 'global_auth_tok_list' list. This variable is not needed because there are no checks based upon it. Signed-off-by: Roberto Sassu Signed-off-by: Tyler Hicks --- fs/ecryptfs/crypto.c | 1 - 1 file changed, 1 deletion(-) (limited to 'fs/ecryptfs/crypto.c') diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 98a2a314ea68..d2a70a4561f9 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -266,7 +266,6 @@ void ecryptfs_destroy_mount_crypt_stat( &mount_crypt_stat->global_auth_tok_list, mount_crypt_stat_list) { list_del(&auth_tok->mount_crypt_stat_list); - mount_crypt_stat->num_global_auth_toks--; if (auth_tok->global_auth_tok_key && !(auth_tok->flags & ECRYPTFS_AUTH_TOK_INVALID)) key_put(auth_tok->global_auth_tok_key); -- cgit v1.2.2