summaryrefslogtreecommitdiffstats
path: root/security/landlock/fs.c
diff options
context:
space:
mode:
Diffstat (limited to 'security/landlock/fs.c')
-rw-r--r--security/landlock/fs.c78
1 files changed, 40 insertions, 38 deletions
diff --git a/security/landlock/fs.c b/security/landlock/fs.c
index 4195a6be60b2..eeecf5b2fa89 100644
--- a/security/landlock/fs.c
+++ b/security/landlock/fs.c
@@ -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);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-21 19:09:03 +0000