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@@ -1,20 +1,35 @@
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/*
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* security/tomoyo/tomoyo.c
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*
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- * LSM hooks for TOMOYO Linux.
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- *
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- * Copyright (C) 2005-2010 NTT DATA CORPORATION
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+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
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*/
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#include <linux/security.h>
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#include "common.h"
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+/**
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+ * tomoyo_cred_alloc_blank - Target for security_cred_alloc_blank().
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+ *
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+ * @new: Pointer to "struct cred".
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+ * @gfp: Memory allocation flags.
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+ *
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+ * Returns 0.
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+ */
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static int tomoyo_cred_alloc_blank(struct cred *new, gfp_t gfp)
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{
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new->security = NULL;
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return 0;
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}
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+/**
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+ * tomoyo_cred_prepare - Target for security_prepare_creds().
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+ *
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+ * @new: Pointer to "struct cred".
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+ * @old: Pointer to "struct cred".
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+ * @gfp: Memory allocation flags.
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+ *
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+ * Returns 0.
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+ */
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static int tomoyo_cred_prepare(struct cred *new, const struct cred *old,
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gfp_t gfp)
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{
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@@ -25,11 +40,22 @@ static int tomoyo_cred_prepare(struct cred *new, const struct cred *old,
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return 0;
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}
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+/**
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+ * tomoyo_cred_transfer - Target for security_transfer_creds().
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+ *
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+ * @new: Pointer to "struct cred".
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+ * @old: Pointer to "struct cred".
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+ */
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static void tomoyo_cred_transfer(struct cred *new, const struct cred *old)
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{
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tomoyo_cred_prepare(new, old, 0);
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}
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+/**
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+ * tomoyo_cred_free - Target for security_cred_free().
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+ *
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+ * @cred: Pointer to "struct cred".
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+ */
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static void tomoyo_cred_free(struct cred *cred)
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{
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struct tomoyo_domain_info *domain = cred->security;
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@@ -37,6 +63,13 @@ static void tomoyo_cred_free(struct cred *cred)
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atomic_dec(&domain->users);
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}
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+/**
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+ * tomoyo_bprm_set_creds - Target for security_bprm_set_creds().
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+ *
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+ * @bprm: Pointer to "struct linux_binprm".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_bprm_set_creds(struct linux_binprm *bprm)
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{
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int rc;
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@@ -75,6 +108,13 @@ static int tomoyo_bprm_set_creds(struct linux_binprm *bprm)
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return 0;
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}
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+/**
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+ * tomoyo_bprm_check_security - Target for security_bprm_check().
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+ *
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+ * @bprm: Pointer to "struct linux_binprm".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_bprm_check_security(struct linux_binprm *bprm)
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{
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struct tomoyo_domain_info *domain = bprm->cred->security;
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@@ -92,26 +132,59 @@ static int tomoyo_bprm_check_security(struct linux_binprm *bprm)
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/*
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* Read permission is checked against interpreters using next domain.
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*/
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- return tomoyo_check_open_permission(domain, &bprm->file->f_path, O_RDONLY);
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+ return tomoyo_check_open_permission(domain, &bprm->file->f_path,
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+ O_RDONLY);
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}
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+/**
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+ * tomoyo_inode_getattr - Target for security_inode_getattr().
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+ *
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+ * @mnt: Pointer to "struct vfsmount".
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+ * @dentry: Pointer to "struct dentry".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
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{
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struct path path = { mnt, dentry };
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return tomoyo_path_perm(TOMOYO_TYPE_GETATTR, &path, NULL);
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}
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+/**
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+ * tomoyo_path_truncate - Target for security_path_truncate().
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+ *
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+ * @path: Pointer to "struct path".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_truncate(struct path *path)
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{
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return tomoyo_path_perm(TOMOYO_TYPE_TRUNCATE, path, NULL);
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}
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+/**
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+ * tomoyo_path_unlink - Target for security_path_unlink().
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+ *
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+ * @parent: Pointer to "struct path".
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+ * @dentry: Pointer to "struct dentry".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_unlink(struct path *parent, struct dentry *dentry)
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{
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struct path path = { parent->mnt, dentry };
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return tomoyo_path_perm(TOMOYO_TYPE_UNLINK, &path, NULL);
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}
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+/**
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+ * tomoyo_path_mkdir - Target for security_path_mkdir().
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+ *
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+ * @parent: Pointer to "struct path".
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+ * @dentry: Pointer to "struct dentry".
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+ * @mode: DAC permission mode.
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_mkdir(struct path *parent, struct dentry *dentry,
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int mode)
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{
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@@ -120,12 +193,29 @@ static int tomoyo_path_mkdir(struct path *parent, struct dentry *dentry,
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mode & S_IALLUGO);
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}
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+/**
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+ * tomoyo_path_rmdir - Target for security_path_rmdir().
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+ *
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+ * @parent: Pointer to "struct path".
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+ * @dentry: Pointer to "struct dentry".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_rmdir(struct path *parent, struct dentry *dentry)
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{
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struct path path = { parent->mnt, dentry };
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return tomoyo_path_perm(TOMOYO_TYPE_RMDIR, &path, NULL);
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}
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+/**
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+ * tomoyo_path_symlink - Target for security_path_symlink().
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+ *
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+ * @parent: Pointer to "struct path".
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+ * @dentry: Pointer to "struct dentry".
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+ * @old_name: Symlink's content.
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_symlink(struct path *parent, struct dentry *dentry,
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const char *old_name)
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{
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@@ -133,6 +223,16 @@ static int tomoyo_path_symlink(struct path *parent, struct dentry *dentry,
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return tomoyo_path_perm(TOMOYO_TYPE_SYMLINK, &path, old_name);
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}
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+/**
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+ * tomoyo_path_mknod - Target for security_path_mknod().
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+ *
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+ * @parent: Pointer to "struct path".
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+ * @dentry: Pointer to "struct dentry".
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+ * @mode: DAC permission mode.
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+ * @dev: Device attributes.
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_mknod(struct path *parent, struct dentry *dentry,
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int mode, unsigned int dev)
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{
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@@ -163,6 +263,15 @@ static int tomoyo_path_mknod(struct path *parent, struct dentry *dentry,
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return tomoyo_path_number_perm(type, &path, perm);
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}
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+/**
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+ * tomoyo_path_link - Target for security_path_link().
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+ *
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+ * @old_dentry: Pointer to "struct dentry".
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+ * @new_dir: Pointer to "struct path".
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+ * @new_dentry: Pointer to "struct dentry".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_link(struct dentry *old_dentry, struct path *new_dir,
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struct dentry *new_dentry)
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{
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@@ -171,6 +280,16 @@ static int tomoyo_path_link(struct dentry *old_dentry, struct path *new_dir,
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return tomoyo_path2_perm(TOMOYO_TYPE_LINK, &path1, &path2);
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}
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+/**
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+ * tomoyo_path_rename - Target for security_path_rename().
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+ *
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+ * @old_parent: Pointer to "struct path".
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+ * @old_dentry: Pointer to "struct dentry".
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+ * @new_parent: Pointer to "struct path".
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+ * @new_dentry: Pointer to "struct dentry".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_rename(struct path *old_parent,
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struct dentry *old_dentry,
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struct path *new_parent,
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@@ -181,6 +300,15 @@ static int tomoyo_path_rename(struct path *old_parent,
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return tomoyo_path2_perm(TOMOYO_TYPE_RENAME, &path1, &path2);
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}
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+/**
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+ * tomoyo_file_fcntl - Target for security_file_fcntl().
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+ *
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+ * @file: Pointer to "struct file".
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+ * @cmd: Command for fcntl().
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+ * @arg: Argument for @cmd.
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_file_fcntl(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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@@ -190,6 +318,14 @@ static int tomoyo_file_fcntl(struct file *file, unsigned int cmd,
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O_WRONLY | (arg & O_APPEND));
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}
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+/**
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+ * tomoyo_dentry_open - Target for security_dentry_open().
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+ *
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+ * @f: Pointer to "struct file".
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+ * @cred: Pointer to "struct cred".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_dentry_open(struct file *f, const struct cred *cred)
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{
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int flags = f->f_flags;
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@@ -199,12 +335,30 @@ static int tomoyo_dentry_open(struct file *f, const struct cred *cred)
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return tomoyo_check_open_permission(tomoyo_domain(), &f->f_path, flags);
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}
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+/**
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+ * tomoyo_file_ioctl - Target for security_file_ioctl().
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+ *
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+ * @file: Pointer to "struct file".
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+ * @cmd: Command for ioctl().
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+ * @arg: Argument for @cmd.
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_file_ioctl(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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return tomoyo_path_number_perm(TOMOYO_TYPE_IOCTL, &file->f_path, cmd);
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}
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+/**
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+ * tomoyo_path_chmod - Target for security_path_chmod().
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+ *
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+ * @dentry: Pointer to "struct dentry".
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+ * @mnt: Pointer to "struct vfsmount".
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+ * @mode: DAC permission mode.
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_chmod(struct dentry *dentry, struct vfsmount *mnt,
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mode_t mode)
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{
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@@ -213,6 +367,15 @@ static int tomoyo_path_chmod(struct dentry *dentry, struct vfsmount *mnt,
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mode & S_IALLUGO);
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}
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+/**
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+ * tomoyo_path_chown - Target for security_path_chown().
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+ *
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+ * @path: Pointer to "struct path".
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+ * @uid: Owner ID.
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+ * @gid: Group ID.
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_chown(struct path *path, uid_t uid, gid_t gid)
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{
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int error = 0;
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@@ -223,23 +386,57 @@ static int tomoyo_path_chown(struct path *path, uid_t uid, gid_t gid)
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return error;
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}
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+/**
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+ * tomoyo_path_chroot - Target for security_path_chroot().
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+ *
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+ * @path: Pointer to "struct path".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_path_chroot(struct path *path)
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{
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return tomoyo_path_perm(TOMOYO_TYPE_CHROOT, path, NULL);
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}
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+/**
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+ * tomoyo_sb_mount - Target for security_sb_mount().
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+ *
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+ * @dev_name: Name of device file. Maybe NULL.
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+ * @path: Pointer to "struct path".
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+ * @type: Name of filesystem type. Maybe NULL.
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+ * @flags: Mount options.
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+ * @data: Optional data. Maybe NULL.
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_sb_mount(char *dev_name, struct path *path,
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char *type, unsigned long flags, void *data)
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{
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return tomoyo_mount_permission(dev_name, path, type, flags, data);
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}
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+/**
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+ * tomoyo_sb_umount - Target for security_sb_umount().
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+ *
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+ * @mnt: Pointer to "struct vfsmount".
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+ * @flags: Unmount options.
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_sb_umount(struct vfsmount *mnt, int flags)
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{
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struct path path = { mnt, mnt->mnt_root };
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return tomoyo_path_perm(TOMOYO_TYPE_UMOUNT, &path, NULL);
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}
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+/**
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+ * tomoyo_sb_pivotroot - Target for security_sb_pivotroot().
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+ *
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+ * @old_path: Pointer to "struct path".
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+ * @new_path: Pointer to "struct path".
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+ *
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+ * Returns 0 on success, negative value otherwise.
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+ */
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static int tomoyo_sb_pivotroot(struct path *old_path, struct path *new_path)
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{
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return tomoyo_path2_perm(TOMOYO_TYPE_PIVOT_ROOT, new_path, old_path);
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@@ -280,6 +477,11 @@ static struct security_operations tomoyo_security_ops = {
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/* Lock for GC. */
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struct srcu_struct tomoyo_ss;
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+/**
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+ * tomoyo_init - Register TOMOYO Linux as a LSM module.
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+ *
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+ * Returns 0.
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+ */
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static int __init tomoyo_init(void)
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{
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struct cred *cred = (struct cred *) current_cred();
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