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landlock: Format with clang-format

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Let's follow a consistent and documented coding style.  Everything may
not be to our liking but it is better than tacit knowledge.  Moreover,
this will help maintain style consistency between different developers.

This contains only whitespace changes.

Automatically formatted with:
clang-format-14 -i security/landlock/*.[ch] include/uapi/linux/landlock.h

Link: https://lore.kernel.org/r/20220506160513.523257-3-mic@digikod.net
Cc: stable@vger.kernel.org
Signed-off-by: Mickaël Salaün <mic@digikod.net>
This commit is contained in:
Mickaël Salaün 2022-05-06 18:05:08 +02:00
parent 6cc2df8e3a
commit 06a1c40a09
No known key found for this signature in database
GPG Key ID: E5E3D0E88C82F6D2
10 changed files with 142 additions and 136 deletions
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4
security/landlock/cred.c
View File

@ -15,7 +15,7 @@
#include "setup.h"
static int hook_cred_prepare(struct cred *const new,
const struct cred *const old, const gfp_t gfp)
const struct cred *const old, const gfp_t gfp)
{
struct landlock_ruleset *const old_dom = landlock_cred(old)->domain;
@ -42,5 +42,5 @@ static struct security_hook_list landlock_hooks[] __lsm_ro_after_init = {
__init void landlock_add_cred_hooks(void)
{
security_add_hooks(landlock_hooks, ARRAY_SIZE(landlock_hooks),
LANDLOCK_NAME);
LANDLOCK_NAME);
}

8
security/landlock/cred.h
View File

@ -20,8 +20,8 @@ struct landlock_cred_security {
struct landlock_ruleset *domain;
};
static inline struct landlock_cred_security *landlock_cred(
const struct cred *cred)
static inline struct landlock_cred_security *
landlock_cred(const struct cred *cred)
{
return cred->security + landlock_blob_sizes.lbs_cred;
}
@ -34,8 +34,8 @@ static inline const struct landlock_ruleset *landlock_get_current_domain(void)
/*
* The call needs to come from an RCU read-side critical section.
*/
static inline const struct landlock_ruleset *landlock_get_task_domain(
const struct task_struct *const task)
static inline const struct landlock_ruleset *
landlock_get_task_domain(const struct task_struct *const task)
{
return landlock_cred(__task_cred(task))->domain;
}

78
security/landlock/fs.c
View File

@ -152,14 +152,14 @@ retry:
* @path: Should have been checked by get_path_from_fd().
*/
int landlock_append_fs_rule(struct landlock_ruleset *const ruleset,
const struct path *const path, u32 access_rights)
const struct path *const path, u32 access_rights)
{
int err;
struct landlock_object *object;
/* Files only get access rights that make sense. */
if (!d_is_dir(path->dentry) && (access_rights | ACCESS_FILE) !=
ACCESS_FILE)
if (!d_is_dir(path->dentry) &&
(access_rights | ACCESS_FILE) != ACCESS_FILE)
return -EINVAL;
if (WARN_ON_ONCE(ruleset->num_layers != 1))
return -EINVAL;
@ -182,10 +182,9 @@ int landlock_append_fs_rule(struct landlock_ruleset *const ruleset,
/* Access-control management */
static inline u64 unmask_layers(
const struct landlock_ruleset *const domain,
const struct path *const path, const u32 access_request,
u64 layer_mask)
static inline u64 unmask_layers(const struct landlock_ruleset *const domain,
const struct path *const path,
const u32 access_request, u64 layer_mask)
{
const struct landlock_rule *rule;
const struct inode *inode;
@ -196,8 +195,8 @@ static inline u64 unmask_layers(
return layer_mask;
inode = d_backing_inode(path->dentry);
rcu_read_lock();
rule = landlock_find_rule(domain,
rcu_dereference(landlock_inode(inode)->object));
rule = landlock_find_rule(
domain, rcu_dereference(landlock_inode(inode)->object));
rcu_read_unlock();
if (!rule)
return layer_mask;
@ -225,7 +224,7 @@ static inline u64 unmask_layers(
}
static int check_access_path(const struct landlock_ruleset *const domain,
const struct path *const path, u32 access_request)
const struct path *const path, u32 access_request)
{
bool allowed = false;
struct path walker_path;
@ -245,8 +244,8 @@ static int check_access_path(const struct landlock_ruleset *const domain,
* /proc/<pid>/fd/<file-descriptor> .
*/
if ((path->dentry->d_sb->s_flags & SB_NOUSER) ||
(d_is_positive(path->dentry) &&
unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))))
(d_is_positive(path->dentry) &&
unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))))
return 0;
if (WARN_ON_ONCE(domain->num_layers < 1))
return -EACCES;
@ -270,8 +269,8 @@ static int check_access_path(const struct landlock_ruleset *const domain,
while (true) {
struct dentry *parent_dentry;
layer_mask = unmask_layers(domain, &walker_path,
access_request, layer_mask);
layer_mask = unmask_layers(domain, &walker_path, access_request,
layer_mask);
if (layer_mask == 0) {
/* Stops when a rule from each layer grants access. */
allowed = true;
@ -310,7 +309,7 @@ jump_up:
}
static inline int current_check_access_path(const struct path *const path,
const u32 access_request)
const u32 access_request)
{
const struct landlock_ruleset *const dom =
landlock_get_current_domain();
@ -438,8 +437,8 @@ static void hook_sb_delete(struct super_block *const sb)
if (prev_inode)
iput(prev_inode);
/* Waits for pending iput() in release_inode(). */
wait_var_event(&landlock_superblock(sb)->inode_refs, !atomic_long_read(
&landlock_superblock(sb)->inode_refs));
wait_var_event(&landlock_superblock(sb)->inode_refs,
!atomic_long_read(&landlock_superblock(sb)->inode_refs));
}
/*
@ -461,8 +460,8 @@ static void hook_sb_delete(struct super_block *const sb)
* a dedicated user space option would be required (e.g. as a ruleset flag).
*/
static int hook_sb_mount(const char *const dev_name,
const struct path *const path, const char *const type,
const unsigned long flags, void *const data)
const struct path *const path, const char *const type,
const unsigned long flags, void *const data)
{
if (!landlock_get_current_domain())
return 0;
@ -470,7 +469,7 @@ static int hook_sb_mount(const char *const dev_name,
}
static int hook_move_mount(const struct path *const from_path,
const struct path *const to_path)
const struct path *const to_path)
{
if (!landlock_get_current_domain())
return 0;
@ -504,7 +503,7 @@ static int hook_sb_remount(struct super_block *const sb, void *const mnt_opts)
* view of the filesystem.
*/
static int hook_sb_pivotroot(const struct path *const old_path,
const struct path *const new_path)
const struct path *const new_path)
{
if (!landlock_get_current_domain())
return 0;
@ -547,8 +546,8 @@ static inline u32 get_mode_access(const umode_t mode)
* deal with that.
*/
static int hook_path_link(struct dentry *const old_dentry,
const struct path *const new_dir,
struct dentry *const new_dentry)
const struct path *const new_dir,
struct dentry *const new_dentry)
{
const struct landlock_ruleset *const dom =
landlock_get_current_domain();
@ -561,8 +560,9 @@ static int hook_path_link(struct dentry *const old_dentry,
return -EXDEV;
if (unlikely(d_is_negative(old_dentry)))
return -ENOENT;
return check_access_path(dom, new_dir,
get_mode_access(d_backing_inode(old_dentry)->i_mode));
return check_access_path(
dom, new_dir,
get_mode_access(d_backing_inode(old_dentry)->i_mode));
}
static inline u32 maybe_remove(const struct dentry *const dentry)
@ -570,13 +570,13 @@ static inline u32 maybe_remove(const struct dentry *const dentry)
if (d_is_negative(dentry))
return 0;
return d_is_dir(dentry) ? LANDLOCK_ACCESS_FS_REMOVE_DIR :
LANDLOCK_ACCESS_FS_REMOVE_FILE;
LANDLOCK_ACCESS_FS_REMOVE_FILE;
}
static int hook_path_rename(const struct path *const old_dir,
struct dentry *const old_dentry,
const struct path *const new_dir,
struct dentry *const new_dentry)
struct dentry *const old_dentry,
const struct path *const new_dir,
struct dentry *const new_dentry)
{
const struct landlock_ruleset *const dom =
landlock_get_current_domain();
@ -590,20 +590,21 @@ static int hook_path_rename(const struct path *const old_dir,
if (unlikely(d_is_negative(old_dentry)))
return -ENOENT;
/* RENAME_EXCHANGE is handled because directories are the same. */
return check_access_path(dom, old_dir, maybe_remove(old_dentry) |
maybe_remove(new_dentry) |
return check_access_path(
dom, old_dir,
maybe_remove(old_dentry) | maybe_remove(new_dentry) |
get_mode_access(d_backing_inode(old_dentry)->i_mode));
}
static int hook_path_mkdir(const struct path *const dir,
struct dentry *const dentry, const umode_t mode)
struct dentry *const dentry, const umode_t mode)
{
return current_check_access_path(dir, LANDLOCK_ACCESS_FS_MAKE_DIR);
}
static int hook_path_mknod(const struct path *const dir,
struct dentry *const dentry, const umode_t mode,
const unsigned int dev)
struct dentry *const dentry, const umode_t mode,
const unsigned int dev)
{
const struct landlock_ruleset *const dom =
landlock_get_current_domain();
@ -614,19 +615,20 @@ static int hook_path_mknod(const struct path *const dir,
}
static int hook_path_symlink(const struct path *const dir,
struct dentry *const dentry, const char *const old_name)
struct dentry *const dentry,
const char *const old_name)
{
return current_check_access_path(dir, LANDLOCK_ACCESS_FS_MAKE_SYM);
}
static int hook_path_unlink(const struct path *const dir,
struct dentry *const dentry)
struct dentry *const dentry)
{
return current_check_access_path(dir, LANDLOCK_ACCESS_FS_REMOVE_FILE);
}
static int hook_path_rmdir(const struct path *const dir,
struct dentry *const dentry)
struct dentry *const dentry)
{
return current_check_access_path(dir, LANDLOCK_ACCESS_FS_REMOVE_DIR);
}
@ -690,5 +692,5 @@ static struct security_hook_list landlock_hooks[] __lsm_ro_after_init = {
__init void landlock_add_fs_hooks(void)
{
security_add_hooks(landlock_hooks, ARRAY_SIZE(landlock_hooks),
LANDLOCK_NAME);
LANDLOCK_NAME);
}

11
security/landlock/fs.h
View File

@ -50,14 +50,14 @@ struct landlock_superblock_security {
atomic_long_t inode_refs;
};
static inline struct landlock_inode_security *landlock_inode(
const struct inode *const inode)
static inline struct landlock_inode_security *
landlock_inode(const struct inode *const inode)
{
return inode->i_security + landlock_blob_sizes.lbs_inode;
}
static inline struct landlock_superblock_security *landlock_superblock(
const struct super_block *const superblock)
static inline struct landlock_superblock_security *
landlock_superblock(const struct super_block *const superblock)
{
return superblock->s_security + landlock_blob_sizes.lbs_superblock;
}
@ -65,6 +65,7 @@ static inline struct landlock_superblock_security *landlock_superblock(
__init void landlock_add_fs_hooks(void);
int landlock_append_fs_rule(struct landlock_ruleset *const ruleset,
const struct path *const path, u32 access_hierarchy);
const struct path *const path,
u32 access_hierarchy);
#endif /* _SECURITY_LANDLOCK_FS_H */

6
security/landlock/object.c
View File

@ -17,9 +17,9 @@
#include "object.h"
struct landlock_object *landlock_create_object(
const struct landlock_object_underops *const underops,
void *const underobj)
struct landlock_object *
landlock_create_object(const struct landlock_object_underops *const underops,
void *const underobj)
{
struct landlock_object *new_object;

6
security/landlock/object.h
View File

@ -76,9 +76,9 @@ struct landlock_object {
};
};
struct landlock_object *landlock_create_object(
const struct landlock_object_underops *const underops,
void *const underobj);
struct landlock_object *
landlock_create_object(const struct landlock_object_underops *const underops,
void *const underobj);
void landlock_put_object(struct landlock_object *const object);

10
security/landlock/ptrace.c
View File

@ -30,7 +30,7 @@
* means a subset of) the @child domain.
*/
static bool domain_scope_le(const struct landlock_ruleset *const parent,
const struct landlock_ruleset *const child)
const struct landlock_ruleset *const child)
{
const struct landlock_hierarchy *walker;
@ -48,7 +48,7 @@ static bool domain_scope_le(const struct landlock_ruleset *const parent,
}
static bool task_is_scoped(const struct task_struct *const parent,
const struct task_struct *const child)
const struct task_struct *const child)
{
bool is_scoped;
const struct landlock_ruleset *dom_parent, *dom_child;
@ -62,7 +62,7 @@ static bool task_is_scoped(const struct task_struct *const parent,
}
static int task_ptrace(const struct task_struct *const parent,
const struct task_struct *const child)
const struct task_struct *const child)
{
/* Quick return for non-landlocked tasks. */
if (!landlocked(parent))
@ -86,7 +86,7 @@ static int task_ptrace(const struct task_struct *const parent,
* granted, -errno if denied.
*/
static int hook_ptrace_access_check(struct task_struct *const child,
const unsigned int mode)
const unsigned int mode)
{
return task_ptrace(current, child);
}
@ -116,5 +116,5 @@ static struct security_hook_list landlock_hooks[] __lsm_ro_after_init = {
__init void landlock_add_ptrace_hooks(void)
{
security_add_hooks(landlock_hooks, ARRAY_SIZE(landlock_hooks),
LANDLOCK_NAME);
LANDLOCK_NAME);
}

80
security/landlock/ruleset.c
View File

@ -28,8 +28,9 @@ static struct landlock_ruleset *create_ruleset(const u32 num_layers)
{
struct landlock_ruleset *new_ruleset;
new_ruleset = kzalloc(struct_size(new_ruleset, fs_access_masks,
num_layers), GFP_KERNEL_ACCOUNT);
new_ruleset =
kzalloc(struct_size(new_ruleset, fs_access_masks, num_layers),
GFP_KERNEL_ACCOUNT);
if (!new_ruleset)
return ERR_PTR(-ENOMEM);
refcount_set(&new_ruleset->usage, 1);
@ -66,11 +67,10 @@ static void build_check_rule(void)
BUILD_BUG_ON(rule.num_layers < LANDLOCK_MAX_NUM_LAYERS);
}
static struct landlock_rule *create_rule(
struct landlock_object *const object,
const struct landlock_layer (*const layers)[],
const u32 num_layers,
const struct landlock_layer *const new_layer)
static struct landlock_rule *
create_rule(struct landlock_object *const object,
const struct landlock_layer (*const layers)[], const u32 num_layers,
const struct landlock_layer *const new_layer)
{
struct landlock_rule *new_rule;
u32 new_num_layers;
@ -85,7 +85,7 @@ static struct landlock_rule *create_rule(
new_num_layers = num_layers;
}
new_rule = kzalloc(struct_size(new_rule, layers, new_num_layers),
GFP_KERNEL_ACCOUNT);
GFP_KERNEL_ACCOUNT);
if (!new_rule)
return ERR_PTR(-ENOMEM);
RB_CLEAR_NODE(&new_rule->node);
@ -94,7 +94,7 @@ static struct landlock_rule *create_rule(
new_rule->num_layers = new_num_layers;
/* Copies the original layer stack. */
memcpy(new_rule->layers, layers,
flex_array_size(new_rule, layers, num_layers));
flex_array_size(new_rule, layers, num_layers));
if (new_layer)
/* Adds a copy of @new_layer on the layer stack. */
new_rule->layers[new_rule->num_layers - 1] = *new_layer;
@ -142,9 +142,9 @@ static void build_check_ruleset(void)
* access rights.
*/
static int insert_rule(struct landlock_ruleset *const ruleset,
struct landlock_object *const object,
const struct landlock_layer (*const layers)[],
size_t num_layers)
struct landlock_object *const object,
const struct landlock_layer (*const layers)[],
size_t num_layers)
{
struct rb_node **walker_node;
struct rb_node *parent_node = NULL;
@ -156,8 +156,8 @@ static int insert_rule(struct landlock_ruleset *const ruleset,
return -ENOENT;
walker_node = &(ruleset->root.rb_node);
while (*walker_node) {
struct landlock_rule *const this = rb_entry(*walker_node,
struct landlock_rule, node);
struct landlock_rule *const this =
rb_entry(*walker_node, struct landlock_rule, node);
if (this->object != object) {
parent_node = *walker_node;
@ -194,7 +194,7 @@ static int insert_rule(struct landlock_ruleset *const ruleset,
* ruleset and a domain.
*/
new_rule = create_rule(object, &this->layers, this->num_layers,
&(*layers)[0]);
&(*layers)[0]);
if (IS_ERR(new_rule))
return PTR_ERR(new_rule);
rb_replace_node(&this->node, &new_rule->node, &ruleset->root);
@ -228,13 +228,13 @@ static void build_check_layer(void)
/* @ruleset must be locked by the caller. */
int landlock_insert_rule(struct landlock_ruleset *const ruleset,
struct landlock_object *const object, const u32 access)
struct landlock_object *const object, const u32 access)
{
struct landlock_layer layers[] = {{
struct landlock_layer layers[] = { {
.access = access,
/* When @level is zero, insert_rule() extends @ruleset. */
.level = 0,
}};
} };
build_check_layer();
return insert_rule(ruleset, object, &layers, ARRAY_SIZE(layers));
@ -257,7 +257,7 @@ static void put_hierarchy(struct landlock_hierarchy *hierarchy)
}
static int merge_ruleset(struct landlock_ruleset *const dst,
struct landlock_ruleset *const src)
struct landlock_ruleset *const src)
{
struct landlock_rule *walker_rule, *next_rule;
int err = 0;
@ -282,11 +282,11 @@ static int merge_ruleset(struct landlock_ruleset *const dst,
dst->fs_access_masks[dst->num_layers - 1] = src->fs_access_masks[0];
/* Merges the @src tree. */
rbtree_postorder_for_each_entry_safe(walker_rule, next_rule,
&src->root, node) {
struct landlock_layer layers[] = {{
rbtree_postorder_for_each_entry_safe(walker_rule, next_rule, &src->root,
node) {
struct landlock_layer layers[] = { {
.level = dst->num_layers,
}};
} };
if (WARN_ON_ONCE(walker_rule->num_layers != 1)) {
err = -EINVAL;
@ -298,7 +298,7 @@ static int merge_ruleset(struct landlock_ruleset *const dst,
}
layers[0].access = walker_rule->layers[0].access;
err = insert_rule(dst, walker_rule->object, &layers,
ARRAY_SIZE(layers));
ARRAY_SIZE(layers));
if (err)
goto out_unlock;
}
@ -310,7 +310,7 @@ out_unlock:
}
static int inherit_ruleset(struct landlock_ruleset *const parent,
struct landlock_ruleset *const child)
struct landlock_ruleset *const child)
{
struct landlock_rule *walker_rule, *next_rule;
int err = 0;
@ -325,9 +325,10 @@ static int inherit_ruleset(struct landlock_ruleset *const parent,
/* Copies the @parent tree. */
rbtree_postorder_for_each_entry_safe(walker_rule, next_rule,
&parent->root, node) {
&parent->root, node) {
err = insert_rule(child, walker_rule->object,
&walker_rule->layers, walker_rule->num_layers);
&walker_rule->layers,
walker_rule->num_layers);
if (err)
goto out_unlock;
}
@ -338,7 +339,7 @@ static int inherit_ruleset(struct landlock_ruleset *const parent,
}
/* Copies the parent layer stack and leaves a space for the new layer. */
memcpy(child->fs_access_masks, parent->fs_access_masks,
flex_array_size(parent, fs_access_masks, parent->num_layers));
flex_array_size(parent, fs_access_masks, parent->num_layers));
if (WARN_ON_ONCE(!parent->hierarchy)) {
err = -EINVAL;
@ -358,8 +359,7 @@ static void free_ruleset(struct landlock_ruleset *const ruleset)
struct landlock_rule *freeme, *next;
might_sleep();
rbtree_postorder_for_each_entry_safe(freeme, next, &ruleset->root,
node)
rbtree_postorder_for_each_entry_safe(freeme, next, &ruleset->root, node)
free_rule(freeme);
put_hierarchy(ruleset->hierarchy);
kfree(ruleset);
@ -397,9 +397,9 @@ void landlock_put_ruleset_deferred(struct landlock_ruleset *const ruleset)
* Returns the intersection of @parent and @ruleset, or returns @parent if
* @ruleset is empty, or returns a duplicate of @ruleset if @parent is empty.
*/
struct landlock_ruleset *landlock_merge_ruleset(
struct landlock_ruleset *const parent,
struct landlock_ruleset *const ruleset)
struct landlock_ruleset *
landlock_merge_ruleset(struct landlock_ruleset *const parent,
struct landlock_ruleset *const ruleset)
{
struct landlock_ruleset *new_dom;
u32 num_layers;
@ -421,8 +421,8 @@ struct landlock_ruleset *landlock_merge_ruleset(
new_dom = create_ruleset(num_layers);
if (IS_ERR(new_dom))
return new_dom;
new_dom->hierarchy = kzalloc(sizeof(*new_dom->hierarchy),
GFP_KERNEL_ACCOUNT);
new_dom->hierarchy =
kzalloc(sizeof(*new_dom->hierarchy), GFP_KERNEL_ACCOUNT);
if (!new_dom->hierarchy) {
err = -ENOMEM;
goto out_put_dom;
@ -449,9 +449,9 @@ out_put_dom:
/*
* The returned access has the same lifetime as @ruleset.
*/
const struct landlock_rule *landlock_find_rule(
const struct landlock_ruleset *const ruleset,
const struct landlock_object *const object)
const struct landlock_rule *
landlock_find_rule(const struct landlock_ruleset *const ruleset,
const struct landlock_object *const object)
{
const struct rb_node *node;
@ -459,8 +459,8 @@ const struct landlock_rule *landlock_find_rule(
return NULL;
node = ruleset->root.rb_node;
while (node) {
struct landlock_rule *this = rb_entry(node,
struct landlock_rule, node);
struct landlock_rule *this =
rb_entry(node, struct landlock_rule, node);
if (this->object == object)
return this;

15
security/landlock/ruleset.h
View File

@ -146,15 +146,16 @@ void landlock_put_ruleset(struct landlock_ruleset *const ruleset);
void landlock_put_ruleset_deferred(struct landlock_ruleset *const ruleset);
int landlock_insert_rule(struct landlock_ruleset *const ruleset,
struct landlock_object *const object, const u32 access);
struct landlock_object *const object,
const u32 access);
struct landlock_ruleset *landlock_merge_ruleset(
struct landlock_ruleset *const parent,
struct landlock_ruleset *const ruleset);
struct landlock_ruleset *
landlock_merge_ruleset(struct landlock_ruleset *const parent,
struct landlock_ruleset *const ruleset);
const struct landlock_rule *landlock_find_rule(
const struct landlock_ruleset *const ruleset,
const struct landlock_object *const object);
const struct landlock_rule *
landlock_find_rule(const struct landlock_ruleset *const ruleset,
const struct landlock_object *const object);
static inline void landlock_get_ruleset(struct landlock_ruleset *const ruleset)
{

60
security/landlock/syscalls.c
View File

@ -43,9 +43,10 @@
* @src: User space pointer or NULL.
* @usize: (Alleged) size of the data pointed to by @src.
*/
static __always_inline int copy_min_struct_from_user(void *const dst,
const size_t ksize, const size_t ksize_min,
const void __user *const src, const size_t usize)
static __always_inline int
copy_min_struct_from_user(void *const dst, const size_t ksize,
const size_t ksize_min, const void __user *const src,
const size_t usize)
{
/* Checks buffer inconsistencies. */
BUILD_BUG_ON(!dst);
@ -93,7 +94,7 @@ static void build_check_abi(void)
/* Ruleset handling */
static int fop_ruleset_release(struct inode *const inode,
struct file *const filp)
struct file *const filp)
{
struct landlock_ruleset *ruleset = filp->private_data;
@ -102,15 +103,15 @@ static int fop_ruleset_release(struct inode *const inode,
}
static ssize_t fop_dummy_read(struct file *const filp, char __user *const buf,
const size_t size, loff_t *const ppos)
const size_t size, loff_t *const ppos)
{
/* Dummy handler to enable FMODE_CAN_READ. */
return -EINVAL;
}
static ssize_t fop_dummy_write(struct file *const filp,
const char __user *const buf, const size_t size,
loff_t *const ppos)
const char __user *const buf, const size_t size,
loff_t *const ppos)
{
/* Dummy handler to enable FMODE_CAN_WRITE. */
return -EINVAL;
@ -128,7 +129,7 @@ static const struct file_operations ruleset_fops = {
.write = fop_dummy_write,
};
#define LANDLOCK_ABI_VERSION 1
#define LANDLOCK_ABI_VERSION 1
/**
* sys_landlock_create_ruleset - Create a new ruleset
@ -168,22 +169,23 @@ SYSCALL_DEFINE3(landlock_create_ruleset,
return -EOPNOTSUPP;
if (flags) {
if ((flags == LANDLOCK_CREATE_RULESET_VERSION)
&& !attr && !size)
if ((flags == LANDLOCK_CREATE_RULESET_VERSION) && !attr &&
!size)
return LANDLOCK_ABI_VERSION;
return -EINVAL;
}
/* Copies raw user space buffer. */
err = copy_min_struct_from_user(&ruleset_attr, sizeof(ruleset_attr),
offsetofend(typeof(ruleset_attr), handled_access_fs),
attr, size);
offsetofend(typeof(ruleset_attr),
handled_access_fs),
attr, size);
if (err)
return err;
/* Checks content (and 32-bits cast). */
if ((ruleset_attr.handled_access_fs | LANDLOCK_MASK_ACCESS_FS) !=
LANDLOCK_MASK_ACCESS_FS)
LANDLOCK_MASK_ACCESS_FS)
return -EINVAL;
/* Checks arguments and transforms to kernel struct. */
@ -193,7 +195,7 @@ SYSCALL_DEFINE3(landlock_create_ruleset,
/* Creates anonymous FD referring to the ruleset. */
ruleset_fd = anon_inode_getfd("[landlock-ruleset]", &ruleset_fops,
ruleset, O_RDWR | O_CLOEXEC);
ruleset, O_RDWR | O_CLOEXEC);
if (ruleset_fd < 0)
landlock_put_ruleset(ruleset);
return ruleset_fd;
@ -204,7 +206,7 @@ SYSCALL_DEFINE3(landlock_create_ruleset,
* landlock_put_ruleset() on the return value.
*/
static struct landlock_ruleset *get_ruleset_from_fd(const int fd,
const fmode_t mode)
const fmode_t mode)
{
struct fd ruleset_f;
struct landlock_ruleset *ruleset;
@ -244,8 +246,8 @@ static int get_path_from_fd(const s32 fd, struct path *const path)
struct fd f;
int err = 0;
BUILD_BUG_ON(!__same_type(fd,
((struct landlock_path_beneath_attr *)NULL)->parent_fd));
BUILD_BUG_ON(!__same_type(
fd, ((struct landlock_path_beneath_attr *)NULL)->parent_fd));
/* Handles O_PATH. */
f = fdget_raw(fd);
@ -257,10 +259,10 @@ static int get_path_from_fd(const s32 fd, struct path *const path)
* pipefs).
*/
if ((f.file->f_op == &ruleset_fops) ||
(f.file->f_path.mnt->mnt_flags & MNT_INTERNAL) ||
(f.file->f_path.dentry->d_sb->s_flags & SB_NOUSER) ||
d_is_negative(f.file->f_path.dentry) ||
IS_PRIVATE(d_backing_inode(f.file->f_path.dentry))) {
(f.file->f_path.mnt->mnt_flags & MNT_INTERNAL) ||
(f.file->f_path.dentry->d_sb->s_flags & SB_NOUSER) ||
d_is_negative(f.file->f_path.dentry) ||
IS_PRIVATE(d_backing_inode(f.file->f_path.dentry))) {
err = -EBADFD;
goto out_fdput;
}
@ -301,8 +303,8 @@ out_fdput:
* - EPERM: @ruleset_fd has no write access to the underlying ruleset;
* - EFAULT: @rule_attr inconsistency.
*/
SYSCALL_DEFINE4(landlock_add_rule,
const int, ruleset_fd, const enum landlock_rule_type, rule_type,
SYSCALL_DEFINE4(landlock_add_rule, const int, ruleset_fd,
const enum landlock_rule_type, rule_type,
const void __user *const, rule_attr, const __u32, flags)
{
struct landlock_path_beneath_attr path_beneath_attr;
@ -322,7 +324,7 @@ SYSCALL_DEFINE4(landlock_add_rule,
/* Copies raw user space buffer, only one type for now. */
res = copy_from_user(&path_beneath_attr, rule_attr,
sizeof(path_beneath_attr));
sizeof(path_beneath_attr));
if (res)
return -EFAULT;
@ -344,7 +346,7 @@ SYSCALL_DEFINE4(landlock_add_rule,
* (ruleset->fs_access_masks[0] is automatically upgraded to 64-bits).
*/
if ((path_beneath_attr.allowed_access | ruleset->fs_access_masks[0]) !=
ruleset->fs_access_masks[0]) {
ruleset->fs_access_masks[0]) {
err = -EINVAL;
goto out_put_ruleset;
}
@ -356,7 +358,7 @@ SYSCALL_DEFINE4(landlock_add_rule,
/* Imports the new rule. */
err = landlock_append_fs_rule(ruleset, &path,
path_beneath_attr.allowed_access);
path_beneath_attr.allowed_access);
path_put(&path);
out_put_ruleset:
@ -389,8 +391,8 @@ out_put_ruleset:
* - E2BIG: The maximum number of stacked rulesets is reached for the current
* thread.
*/
SYSCALL_DEFINE2(landlock_restrict_self,
const int, ruleset_fd, const __u32, flags)
SYSCALL_DEFINE2(landlock_restrict_self, const int, ruleset_fd, const __u32,
flags)
{
struct landlock_ruleset *new_dom, *ruleset;
struct cred *new_cred;
@ -409,7 +411,7 @@ SYSCALL_DEFINE2(landlock_restrict_self,
* returned.
*/
if (!task_no_new_privs(current) &&
!ns_capable_noaudit(current_user_ns(), CAP_SYS_ADMIN))
!ns_capable_noaudit(current_user_ns(), CAP_SYS_ADMIN))
return -EPERM;
/* Gets and checks the ruleset. */