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| author | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-04-13 15:29:27 -0500 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2009-04-22 03:54:13 -0500 |
| commit | 13a791b4e63eb0537a7f804a340d6527485983b4 (patch) | |
| tree | ad3c74093e8efe0da14644a0dc16ac0c61b2e6e5 /fs/ecryptfs/crypto.c | |
| parent | 3a5203ab3c0c31e0f1434c69e893bfb85c6e6657 (diff) | |
| download | linux-13a791b4e63eb0537a7f804a340d6527485983b4.tar.bz2 | |
eCryptfs: Fix data corruption when using ecryptfs_passthrough
ecryptfs_passthrough is a mount option that allows eCryptfs to allow
data to be written to non-eCryptfs files in the lower filesystem. The
passthrough option was causing data corruption due to it not always
being treated as a non-eCryptfs file.
The first 8 bytes of an eCryptfs file contains the decrypted file size.
This value was being written to the non-eCryptfs files, too. Also,
extra 0x00 characters were being written to make the file size a
multiple of PAGE_CACHE_SIZE.
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Diffstat (limited to 'fs/ecryptfs/crypto.c')
| -rw-r--r-- | fs/ecryptfs/crypto.c | 21 |
1 files changed, 2 insertions, 19 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 8b65f289ee00..b91851f1cda3 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -483,15 +483,7 @@ int ecryptfs_encrypt_page(struct page *page) ecryptfs_inode = page->mapping->host; crypt_stat = &(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat); - if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) { - rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, page, - 0, PAGE_CACHE_SIZE); - if (rc) - printk(KERN_ERR "%s: Error attempting to copy " - "page at index [%ld]\n", __func__, - page->index); - goto out; - } + BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)); enc_extent_page = alloc_page(GFP_USER); if (!enc_extent_page) { rc = -ENOMEM; @@ -620,16 +612,7 @@ int ecryptfs_decrypt_page(struct page *page) ecryptfs_inode = page->mapping->host; crypt_stat = &(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat); - if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) { - rc = ecryptfs_read_lower_page_segment(page, page->index, 0, - PAGE_CACHE_SIZE, - ecryptfs_inode); - if (rc) - printk(KERN_ERR "%s: Error attempting to copy " - "page at index [%ld]\n", __func__, - page->index); - goto out; - } + BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)); enc_extent_page = alloc_page(GFP_USER); if (!enc_extent_page) { rc = -ENOMEM; |