diff options
Diffstat (limited to 'security/selinux/hooks.c')
| -rw-r--r-- | security/selinux/hooks.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index d0cfaa9f19d0..94a0bfc748d1 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -420,6 +420,7 @@ static int selinux_is_sblabel_mnt(struct super_block *sb) !strcmp(sb->s_type->name, "sysfs") || !strcmp(sb->s_type->name, "pstore") || !strcmp(sb->s_type->name, "debugfs") || + !strcmp(sb->s_type->name, "tracefs") || !strcmp(sb->s_type->name, "rootfs"); } @@ -3653,6 +3654,38 @@ static int selinux_kernel_module_request(char *kmod_name) SYSTEM__MODULE_REQUEST, &ad); } +static int selinux_kernel_module_from_file(struct file *file) +{ + struct common_audit_data ad; + struct inode_security_struct *isec; + struct file_security_struct *fsec; + struct inode *inode; + u32 sid = current_sid(); + int rc; + + /* init_module */ + if (file == NULL) + return avc_has_perm(sid, sid, SECCLASS_SYSTEM, + SYSTEM__MODULE_LOAD, NULL); + + /* finit_module */ + ad.type = LSM_AUDIT_DATA_PATH; + ad.u.path = file->f_path; + + inode = file_inode(file); + isec = inode->i_security; + fsec = file->f_security; + + if (sid != fsec->sid) { + rc = avc_has_perm(sid, fsec->sid, SECCLASS_FD, FD__USE, &ad); + if (rc) + return rc; + } + + return avc_has_perm(sid, isec->sid, SECCLASS_SYSTEM, + SYSTEM__MODULE_LOAD, &ad); +} + static int selinux_task_setpgid(struct task_struct *p, pid_t pgid) { return current_has_perm(p, PROCESS__SETPGID); @@ -5943,6 +5976,7 @@ static struct security_hook_list selinux_hooks[] = { LSM_HOOK_INIT(kernel_act_as, selinux_kernel_act_as), LSM_HOOK_INIT(kernel_create_files_as, selinux_kernel_create_files_as), LSM_HOOK_INIT(kernel_module_request, selinux_kernel_module_request), + LSM_HOOK_INIT(kernel_module_from_file, selinux_kernel_module_from_file), LSM_HOOK_INIT(task_setpgid, selinux_task_setpgid), LSM_HOOK_INIT(task_getpgid, selinux_task_getpgid), LSM_HOOK_INIT(task_getsid, selinux_task_getsid), |