diff options
Diffstat (limited to 'security/landlock')
| -rw-r--r-- | security/landlock/cred.c | 4 | ||||
| -rw-r--r-- | security/landlock/cred.h | 8 | ||||
| -rw-r--r-- | security/landlock/fs.c | 78 | ||||
| -rw-r--r-- | security/landlock/fs.h | 11 | ||||
| -rw-r--r-- | security/landlock/object.c | 6 | ||||
| -rw-r--r-- | security/landlock/object.h | 6 | ||||
| -rw-r--r-- | security/landlock/ptrace.c | 10 | ||||
| -rw-r--r-- | security/landlock/ruleset.c | 80 | ||||
| -rw-r--r-- | security/landlock/ruleset.h | 15 | ||||
| -rw-r--r-- | security/landlock/syscalls.c | 60 |
10 files changed, 142 insertions, 136 deletions
diff --git a/security/landlock/cred.c b/security/landlock/cred.c index 6725af24c684..ec6c37f04a19 100644 --- a/security/landlock/cred.c +++ b/security/landlock/cred.c @@ -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); } diff --git a/security/landlock/cred.h b/security/landlock/cred.h index 5f99d3decade..af89ab00e6d1 100644 --- a/security/landlock/cred.h +++ b/security/landlock/cred.h @@ -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; } 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); } diff --git a/security/landlock/fs.h b/security/landlock/fs.h index 187284b421c9..03f746e74e9e 100644 --- a/security/landlock/fs.h +++ b/security/landlock/fs.h @@ -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 */ diff --git a/security/landlock/object.c b/security/landlock/object.c index d674fdf9ff04..1f50612f0185 100644 --- a/security/landlock/object.c +++ b/security/landlock/object.c @@ -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; diff --git a/security/landlock/object.h b/security/landlock/object.h index 3f80674c6c8d..5f28c35e8aa8 100644 --- a/security/landlock/object.h +++ b/security/landlock/object.h @@ -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); diff --git a/security/landlock/ptrace.c b/security/landlock/ptrace.c index f55b82446de2..4c5b9cd71286 100644 --- a/security/landlock/ptrace.c +++ b/security/landlock/ptrace.c @@ -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); } diff --git a/security/landlock/ruleset.c b/security/landlock/ruleset.c index ec72b9262bf3..4d33359addbd 100644 --- a/security/landlock/ruleset.c +++ b/security/landlock/ruleset.c @@ -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; diff --git a/security/landlock/ruleset.h b/security/landlock/ruleset.h index 2d3ed7ec5a0a..e9ba47045aca 100644 --- a/security/landlock/ruleset.h +++ b/security/landlock/ruleset.h @@ -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) { diff --git a/security/landlock/syscalls.c b/security/landlock/syscalls.c index 7e27ce394020..2fde978bf8ca 100644 --- a/security/landlock/syscalls.c +++ b/security/landlock/syscalls.c @@ -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. */ |