diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
---|---|---|
committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
commit | 863981e96738983919de841ec669e157e6bdaeb0 (patch) | |
tree | d6d89a12e7eb8017837c057935a2271290907f76 /fs/ecryptfs | |
parent | 8dec7c70575785729a6a9e6719a955e9c545bcab (diff) |
Linux-libre 4.7.1-gnupck-4.7.1-gnu
Diffstat (limited to 'fs/ecryptfs')
-rw-r--r-- | fs/ecryptfs/crypto.c | 54 | ||||
-rw-r--r-- | fs/ecryptfs/ecryptfs_kernel.h | 11 | ||||
-rw-r--r-- | fs/ecryptfs/file.c | 21 | ||||
-rw-r--r-- | fs/ecryptfs/inode.c | 122 | ||||
-rw-r--r-- | fs/ecryptfs/kthread.c | 13 | ||||
-rw-r--r-- | fs/ecryptfs/main.c | 3 | ||||
-rw-r--r-- | fs/ecryptfs/mmap.c | 6 | ||||
-rw-r--r-- | fs/ecryptfs/super.c | 5 |
8 files changed, 118 insertions, 117 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index d09cb4cdd..e5e29f8c9 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -45,7 +45,7 @@ * ecryptfs_to_hex * @dst: Buffer to take hex character representation of contents of * src; must be at least of size (src_size * 2) - * @src: Buffer to be converted to a hex string respresentation + * @src: Buffer to be converted to a hex string representation * @src_size: number of bytes to convert */ void ecryptfs_to_hex(char *dst, char *src, size_t src_size) @@ -60,7 +60,7 @@ void ecryptfs_to_hex(char *dst, char *src, size_t src_size) * ecryptfs_from_hex * @dst: Buffer to take the bytes from src hex; must be at least of * size (src_size / 2) - * @src: Buffer to be converted from a hex string respresentation to raw value + * @src: Buffer to be converted from a hex string representation to raw value * @dst_size: size of dst buffer, or number of hex characters pairs to convert */ void ecryptfs_from_hex(char *dst, char *src, int dst_size) @@ -105,19 +105,7 @@ static int ecryptfs_calculate_md5(char *dst, struct crypto_shash *tfm; int rc = 0; - mutex_lock(&crypt_stat->cs_hash_tfm_mutex); tfm = crypt_stat->hash_tfm; - if (!tfm) { - tfm = crypto_alloc_shash(ECRYPTFS_DEFAULT_HASH, 0, 0); - if (IS_ERR(tfm)) { - rc = PTR_ERR(tfm); - ecryptfs_printk(KERN_ERR, "Error attempting to " - "allocate crypto context; rc = [%d]\n", - rc); - goto out; - } - crypt_stat->hash_tfm = tfm; - } rc = ecryptfs_hash_digest(tfm, src, len, dst); if (rc) { printk(KERN_ERR @@ -126,7 +114,6 @@ static int ecryptfs_calculate_md5(char *dst, goto out; } out: - mutex_unlock(&crypt_stat->cs_hash_tfm_mutex); return rc; } @@ -207,16 +194,29 @@ out: * * Initialize the crypt_stat structure. */ -void -ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat) +int ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat) { + struct crypto_shash *tfm; + int rc; + + tfm = crypto_alloc_shash(ECRYPTFS_DEFAULT_HASH, 0, 0); + if (IS_ERR(tfm)) { + rc = PTR_ERR(tfm); + ecryptfs_printk(KERN_ERR, "Error attempting to " + "allocate crypto context; rc = [%d]\n", + rc); + return rc; + } + memset((void *)crypt_stat, 0, sizeof(struct ecryptfs_crypt_stat)); INIT_LIST_HEAD(&crypt_stat->keysig_list); mutex_init(&crypt_stat->keysig_list_mutex); mutex_init(&crypt_stat->cs_mutex); mutex_init(&crypt_stat->cs_tfm_mutex); - mutex_init(&crypt_stat->cs_hash_tfm_mutex); + crypt_stat->hash_tfm = tfm; crypt_stat->flags |= ECRYPTFS_STRUCT_INITIALIZED; + + return 0; } /** @@ -953,7 +953,7 @@ struct ecryptfs_cipher_code_str_map_elem { }; /* Add support for additional ciphers by adding elements here. The - * cipher_code is whatever OpenPGP applicatoins use to identify the + * cipher_code is whatever OpenPGP applications use to identify the * ciphers. List in order of probability. */ static struct ecryptfs_cipher_code_str_map_elem ecryptfs_cipher_code_str_map[] = { @@ -1141,12 +1141,13 @@ ecryptfs_write_metadata_to_contents(struct inode *ecryptfs_inode, static int ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry, + struct inode *ecryptfs_inode, char *page_virt, size_t size) { int rc; - rc = ecryptfs_setxattr(ecryptfs_dentry, ECRYPTFS_XATTR_NAME, page_virt, - size, 0); + rc = ecryptfs_setxattr(ecryptfs_dentry, ecryptfs_inode, + ECRYPTFS_XATTR_NAME, page_virt, size, 0); return rc; } @@ -1215,8 +1216,8 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry, goto out_free; } if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) - rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, virt, - size); + rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, ecryptfs_inode, + virt, size); else rc = ecryptfs_write_metadata_to_contents(ecryptfs_inode, virt, virt_len); @@ -1369,7 +1370,9 @@ int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode) ssize_t size; int rc = 0; - size = ecryptfs_getxattr_lower(lower_dentry, ECRYPTFS_XATTR_NAME, + size = ecryptfs_getxattr_lower(lower_dentry, + ecryptfs_inode_to_lower(ecryptfs_inode), + ECRYPTFS_XATTR_NAME, page_virt, ECRYPTFS_DEFAULT_EXTENT_SIZE); if (size < 0) { if (unlikely(ecryptfs_verbosity > 0)) @@ -1391,6 +1394,7 @@ int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry, int rc; rc = ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), + ecryptfs_inode_to_lower(inode), ECRYPTFS_XATTR_NAME, file_size, ECRYPTFS_SIZE_AND_MARKER_BYTES); if (rc < ECRYPTFS_SIZE_AND_MARKER_BYTES) @@ -1406,7 +1410,7 @@ int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry, * * Common entry point for reading file metadata. From here, we could * retrieve the header information from the header region of the file, - * the xattr region of the file, or some other repostory that is + * the xattr region of the file, or some other repository that is * stored separately from the file itself. The current implementation * supports retrieving the metadata information from the file contents * and from the xattr region. diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index d123fbaa2..4ba1547bb 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -242,7 +242,6 @@ struct ecryptfs_crypt_stat { struct list_head keysig_list; struct mutex keysig_list_mutex; struct mutex cs_tfm_mutex; - struct mutex cs_hash_tfm_mutex; struct mutex cs_mutex; }; @@ -577,7 +576,7 @@ int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, int sg_size); int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); void ecryptfs_rotate_iv(unsigned char *iv); -void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); +int ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); void ecryptfs_destroy_mount_crypt_stat( struct ecryptfs_mount_crypt_stat *mount_crypt_stat); @@ -607,11 +606,11 @@ ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, unsigned char *src, struct dentry *ecryptfs_dentry); int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); ssize_t -ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, - void *value, size_t size); +ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode, + const char *name, void *value, size_t size); int -ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, - size_t size, int flags); +ecryptfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name, + const void *value, size_t size, int flags); int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode); #ifdef CONFIG_ECRYPT_FS_MESSAGING int ecryptfs_process_response(struct ecryptfs_daemon *daemon, diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c index f02404052..ca4e83750 100644 --- a/fs/ecryptfs/file.c +++ b/fs/ecryptfs/file.c @@ -169,9 +169,22 @@ out: return rc; } +static int ecryptfs_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct file *lower_file = ecryptfs_file_to_lower(file); + /* + * Don't allow mmap on top of file systems that don't support it + * natively. If FILESYSTEM_MAX_STACK_DEPTH > 2 or ecryptfs + * allows recursive mounting, this will need to be extended. + */ + if (!lower_file->f_op->mmap) + return -ENODEV; + return generic_file_mmap(file, vma); +} + /** * ecryptfs_open - * @inode: inode speciying file to open + * @inode: inode specifying file to open * @file: Structure to return filled in * * Opens the file specified by inode. @@ -240,7 +253,7 @@ out: /** * ecryptfs_dir_open - * @inode: inode speciying file to open + * @inode: inode specifying file to open * @file: Structure to return filled in * * Opens the file specified by inode. @@ -383,7 +396,7 @@ ecryptfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) #endif const struct file_operations ecryptfs_dir_fops = { - .iterate = ecryptfs_readdir, + .iterate_shared = ecryptfs_readdir, .read = generic_read_dir, .unlocked_ioctl = ecryptfs_unlocked_ioctl, #ifdef CONFIG_COMPAT @@ -403,7 +416,7 @@ const struct file_operations ecryptfs_main_fops = { #ifdef CONFIG_COMPAT .compat_ioctl = ecryptfs_compat_ioctl, #endif - .mmap = generic_file_mmap, + .mmap = ecryptfs_mmap, .open = ecryptfs_open, .flush = ecryptfs_flush, .release = ecryptfs_release, diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index 224b49e71..9d153b6a1 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -324,9 +324,8 @@ static int ecryptfs_i_size_read(struct dentry *dentry, struct inode *inode) /** * ecryptfs_lookup_interpose - Dentry interposition for a lookup */ -static int ecryptfs_lookup_interpose(struct dentry *dentry, - struct dentry *lower_dentry, - struct inode *dir_inode) +static struct dentry *ecryptfs_lookup_interpose(struct dentry *dentry, + struct dentry *lower_dentry) { struct inode *inode, *lower_inode = d_inode(lower_dentry); struct ecryptfs_dentry_info *dentry_info; @@ -339,11 +338,12 @@ static int ecryptfs_lookup_interpose(struct dentry *dentry, "to allocate ecryptfs_dentry_info struct\n", __func__); dput(lower_dentry); - return -ENOMEM; + return ERR_PTR(-ENOMEM); } lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent)); - fsstack_copy_attr_atime(dir_inode, d_inode(lower_dentry->d_parent)); + fsstack_copy_attr_atime(d_inode(dentry->d_parent), + d_inode(lower_dentry->d_parent)); BUG_ON(!d_count(lower_dentry)); ecryptfs_set_dentry_private(dentry, dentry_info); @@ -353,27 +353,25 @@ static int ecryptfs_lookup_interpose(struct dentry *dentry, if (d_really_is_negative(lower_dentry)) { /* We want to add because we couldn't find in lower */ d_add(dentry, NULL); - return 0; + return NULL; } - inode = __ecryptfs_get_inode(lower_inode, dir_inode->i_sb); + inode = __ecryptfs_get_inode(lower_inode, dentry->d_sb); if (IS_ERR(inode)) { printk(KERN_ERR "%s: Error interposing; rc = [%ld]\n", __func__, PTR_ERR(inode)); - return PTR_ERR(inode); + return ERR_CAST(inode); } if (S_ISREG(inode->i_mode)) { rc = ecryptfs_i_size_read(dentry, inode); if (rc) { make_bad_inode(inode); - return rc; + return ERR_PTR(rc); } } if (inode->i_state & I_NEW) unlock_new_inode(inode); - d_add(dentry, inode); - - return rc; + return d_splice_alias(inode, dentry); } /** @@ -390,55 +388,42 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, unsigned int flags) { char *encrypted_and_encoded_name = NULL; - size_t encrypted_and_encoded_name_size; - struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL; + struct ecryptfs_mount_crypt_stat *mount_crypt_stat; struct dentry *lower_dir_dentry, *lower_dentry; + const char *name = ecryptfs_dentry->d_name.name; + size_t len = ecryptfs_dentry->d_name.len; + struct dentry *res; int rc = 0; lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent); - lower_dentry = lookup_one_len_unlocked(ecryptfs_dentry->d_name.name, - lower_dir_dentry, - ecryptfs_dentry->d_name.len); - if (IS_ERR(lower_dentry)) { - rc = PTR_ERR(lower_dentry); - ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned " - "[%d] on lower_dentry = [%pd]\n", __func__, rc, - ecryptfs_dentry); - goto out; - } - if (d_really_is_positive(lower_dentry)) - goto interpose; + mount_crypt_stat = &ecryptfs_superblock_to_private( ecryptfs_dentry->d_sb)->mount_crypt_stat; - if (!(mount_crypt_stat - && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES))) - goto interpose; - dput(lower_dentry); - rc = ecryptfs_encrypt_and_encode_filename( - &encrypted_and_encoded_name, &encrypted_and_encoded_name_size, - mount_crypt_stat, ecryptfs_dentry->d_name.name, - ecryptfs_dentry->d_name.len); - if (rc) { - printk(KERN_ERR "%s: Error attempting to encrypt and encode " - "filename; rc = [%d]\n", __func__, rc); - goto out; + if (mount_crypt_stat + && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)) { + rc = ecryptfs_encrypt_and_encode_filename( + &encrypted_and_encoded_name, &len, + mount_crypt_stat, name, len); + if (rc) { + printk(KERN_ERR "%s: Error attempting to encrypt and encode " + "filename; rc = [%d]\n", __func__, rc); + return ERR_PTR(rc); + } + name = encrypted_and_encoded_name; } - lower_dentry = lookup_one_len_unlocked(encrypted_and_encoded_name, - lower_dir_dentry, - encrypted_and_encoded_name_size); + + lower_dentry = lookup_one_len_unlocked(name, lower_dir_dentry, len); if (IS_ERR(lower_dentry)) { - rc = PTR_ERR(lower_dentry); ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned " - "[%d] on lower_dentry = [%s]\n", __func__, rc, - encrypted_and_encoded_name); - goto out; + "[%ld] on lower_dentry = [%s]\n", __func__, + PTR_ERR(lower_dentry), + name); + res = ERR_CAST(lower_dentry); + } else { + res = ecryptfs_lookup_interpose(ecryptfs_dentry, lower_dentry); } -interpose: - rc = ecryptfs_lookup_interpose(ecryptfs_dentry, lower_dentry, - ecryptfs_dir_inode); -out: kfree(encrypted_and_encoded_name); - return ERR_PTR(rc); + return res; } static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir, @@ -898,8 +883,11 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia) struct ecryptfs_crypt_stat *crypt_stat; crypt_stat = &ecryptfs_inode_to_private(d_inode(dentry))->crypt_stat; - if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED)) - ecryptfs_init_crypt_stat(crypt_stat); + if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED)) { + rc = ecryptfs_init_crypt_stat(crypt_stat); + if (rc) + return rc; + } inode = d_inode(dentry); lower_inode = ecryptfs_inode_to_lower(inode); lower_dentry = ecryptfs_dentry_to_lower(dentry); @@ -1013,7 +1001,8 @@ static int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry, } int -ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, +ecryptfs_setxattr(struct dentry *dentry, struct inode *inode, + const char *name, const void *value, size_t size, int flags) { int rc = 0; @@ -1026,36 +1015,37 @@ ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, } rc = vfs_setxattr(lower_dentry, name, value, size, flags); - if (!rc && d_really_is_positive(dentry)) - fsstack_copy_attr_all(d_inode(dentry), d_inode(lower_dentry)); + if (!rc && inode) + fsstack_copy_attr_all(inode, d_inode(lower_dentry)); out: return rc; } ssize_t -ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, - void *value, size_t size) +ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode, + const char *name, void *value, size_t size) { int rc = 0; - if (!d_inode(lower_dentry)->i_op->getxattr) { + if (!lower_inode->i_op->getxattr) { rc = -EOPNOTSUPP; goto out; } - inode_lock(d_inode(lower_dentry)); - rc = d_inode(lower_dentry)->i_op->getxattr(lower_dentry, name, value, - size); - inode_unlock(d_inode(lower_dentry)); + inode_lock(lower_inode); + rc = lower_inode->i_op->getxattr(lower_dentry, lower_inode, + name, value, size); + inode_unlock(lower_inode); out: return rc; } static ssize_t -ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, - size_t size) +ecryptfs_getxattr(struct dentry *dentry, struct inode *inode, + const char *name, void *value, size_t size) { - return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), name, - value, size); + return ecryptfs_getxattr_lower(ecryptfs_dentry_to_lower(dentry), + ecryptfs_inode_to_lower(inode), + name, value, size); } static ssize_t diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c index e818f5ac7..866bb18ef 100644 --- a/fs/ecryptfs/kthread.c +++ b/fs/ecryptfs/kthread.c @@ -25,7 +25,6 @@ #include <linux/slab.h> #include <linux/wait.h> #include <linux/mount.h> -#include <linux/file.h> #include "ecryptfs_kernel.h" struct ecryptfs_open_req { @@ -148,7 +147,7 @@ int ecryptfs_privileged_open(struct file **lower_file, flags |= IS_RDONLY(d_inode(lower_dentry)) ? O_RDONLY : O_RDWR; (*lower_file) = dentry_open(&req.path, flags, cred); if (!IS_ERR(*lower_file)) - goto have_file; + goto out; if ((flags & O_ACCMODE) == O_RDONLY) { rc = PTR_ERR((*lower_file)); goto out; @@ -166,16 +165,8 @@ int ecryptfs_privileged_open(struct file **lower_file, mutex_unlock(&ecryptfs_kthread_ctl.mux); wake_up(&ecryptfs_kthread_ctl.wait); wait_for_completion(&req.done); - if (IS_ERR(*lower_file)) { + if (IS_ERR(*lower_file)) rc = PTR_ERR(*lower_file); - goto out; - } -have_file: - if ((*lower_file)->f_op->mmap == NULL) { - fput(*lower_file); - *lower_file = NULL; - rc = -EMEDIUMTYPE; - } out: return rc; } diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index 1698132d0..612004495 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -738,8 +738,7 @@ static void ecryptfs_free_kmem_caches(void) struct ecryptfs_cache_info *info; info = &ecryptfs_cache_infos[i]; - if (*(info->cache)) - kmem_cache_destroy(*(info->cache)); + kmem_cache_destroy(*(info->cache)); } } diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c index e6b1d8095..9c3437c8a 100644 --- a/fs/ecryptfs/mmap.c +++ b/fs/ecryptfs/mmap.c @@ -436,12 +436,14 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode) goto out; } inode_lock(lower_inode); - size = lower_inode->i_op->getxattr(lower_dentry, ECRYPTFS_XATTR_NAME, + size = lower_inode->i_op->getxattr(lower_dentry, lower_inode, + ECRYPTFS_XATTR_NAME, xattr_virt, PAGE_SIZE); if (size < 0) size = 8; put_unaligned_be64(i_size_read(ecryptfs_inode), xattr_virt); - rc = lower_inode->i_op->setxattr(lower_dentry, ECRYPTFS_XATTR_NAME, + rc = lower_inode->i_op->setxattr(lower_dentry, lower_inode, + ECRYPTFS_XATTR_NAME, xattr_virt, size, 0); inode_unlock(lower_inode); if (rc) diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c index 77a486d3a..85411ceb0 100644 --- a/fs/ecryptfs/super.c +++ b/fs/ecryptfs/super.c @@ -55,7 +55,10 @@ static struct inode *ecryptfs_alloc_inode(struct super_block *sb) inode_info = kmem_cache_alloc(ecryptfs_inode_info_cache, GFP_KERNEL); if (unlikely(!inode_info)) goto out; - ecryptfs_init_crypt_stat(&inode_info->crypt_stat); + if (ecryptfs_init_crypt_stat(&inode_info->crypt_stat)) { + kmem_cache_free(ecryptfs_inode_info_cache, inode_info); + goto out; + } mutex_init(&inode_info->lower_file_mutex); atomic_set(&inode_info->lower_file_count, 0); inode_info->lower_file = NULL; |