diff options
| -rw-r--r-- | security/selinux/hooks.c | 50 |
1 files changed, 42 insertions, 8 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 8ffed9f2004..8294dbfd1f1 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -24,9 +24,11 @@ */ #include <linux/init.h> +#include <linux/kd.h> #include <linux/kernel.h> #include <linux/tracehook.h> #include <linux/errno.h> +#include <linux/ext2_fs.h> #include <linux/sched.h> #include <linux/security.h> #include <linux/xattr.h> @@ -36,6 +38,7 @@ #include <linux/mman.h> #include <linux/slab.h> #include <linux/pagemap.h> +#include <linux/proc_fs.h> #include <linux/swap.h> #include <linux/spinlock.h> #include <linux/syscalls.h> @@ -2849,16 +2852,47 @@ static int selinux_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { const struct cred *cred = current_cred(); - u32 av = 0; + int error = 0; - if (_IOC_DIR(cmd) & _IOC_WRITE) - av |= FILE__WRITE; - if (_IOC_DIR(cmd) & _IOC_READ) - av |= FILE__READ; - if (!av) - av = FILE__IOCTL; + switch (cmd) { + case FIONREAD: + /* fall through */ + case FIBMAP: + /* fall through */ + case FIGETBSZ: + /* fall through */ + case EXT2_IOC_GETFLAGS: + /* fall through */ + case EXT2_IOC_GETVERSION: + error = file_has_perm(cred, file, FILE__GETATTR); + break; + + case EXT2_IOC_SETFLAGS: + /* fall through */ + case EXT2_IOC_SETVERSION: + error = file_has_perm(cred, file, FILE__SETATTR); + break; - return file_has_perm(cred, file, av); + /* sys_ioctl() checks */ + case FIONBIO: + /* fall through */ + case FIOASYNC: + error = file_has_perm(cred, file, 0); + break; + + case KDSKBENT: + case KDSKBSENT: + error = task_has_capability(current, cred, CAP_SYS_TTY_CONFIG, + SECURITY_CAP_AUDIT); + break; + + /* default case assumes that the command will go + * to the file's ioctl() function. + */ + default: + error = file_has_perm(cred, file, FILE__IOCTL); + } + return error; } static int default_noexec; |