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authorEric Paris <eparis@redhat.com>2011-02-01 19:05:39 +0300
committerEric Paris <eparis@redhat.com>2011-02-01 19:12:29 +0300
commit2a7dba391e5628ad665ce84ef9a6648da541ebab (patch)
treeba0722bd74d2c883dbda7ff721850bab411cac04 /fs/ext4
parent821404434f3324bf23f545050ff64055a149766e (diff)
downloadlinux-2a7dba391e5628ad665ce84ef9a6648da541ebab.tar.xz
fs/vfs/security: pass last path component to LSM on inode creation
SELinux would like to implement a new labeling behavior of newly created inodes. We currently label new inodes based on the parent and the creating process. This new behavior would also take into account the name of the new object when deciding the new label. This is not the (supposed) full path, just the last component of the path. This is very useful because creating /etc/shadow is different than creating /etc/passwd but the kernel hooks are unable to differentiate these operations. We currently require that userspace realize it is doing some difficult operation like that and than userspace jumps through SELinux hoops to get things set up correctly. This patch does not implement new behavior, that is obviously contained in a seperate SELinux patch, but it does pass the needed name down to the correct LSM hook. If no such name exists it is fine to pass NULL. Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/ialloc.c2
-rw-r--r--fs/ext4/xattr.h4
-rw-r--r--fs/ext4/xattr_security.c5
3 files changed, 6 insertions, 5 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 1ce240a23ebb..49b6cfd1fc47 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -1042,7 +1042,7 @@ got:
if (err)
goto fail_free_drop;
- err = ext4_init_security(handle, inode, dir);
+ err = ext4_init_security(handle, inode, dir, qstr);
if (err)
goto fail_free_drop;
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 1ef16520b950..25b7387ff183 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -145,10 +145,10 @@ ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
#ifdef CONFIG_EXT4_FS_SECURITY
extern int ext4_init_security(handle_t *handle, struct inode *inode,
- struct inode *dir);
+ struct inode *dir, const struct qstr *qstr);
#else
static inline int ext4_init_security(handle_t *handle, struct inode *inode,
- struct inode *dir)
+ struct inode *dir, const struct qstr *qstr)
{
return 0;
}
diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c
index 9b21268e121c..007c3bfbf094 100644
--- a/fs/ext4/xattr_security.c
+++ b/fs/ext4/xattr_security.c
@@ -49,14 +49,15 @@ ext4_xattr_security_set(struct dentry *dentry, const char *name,
}
int
-ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir)
+ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
+ const struct qstr *qstr)
{
int err;
size_t len;
void *value;
char *name;
- err = security_inode_init_security(inode, dir, &name, &value, &len);
+ err = security_inode_init_security(inode, dir, qstr, &name, &value, &len);
if (err) {
if (err == -EOPNOTSUPP)
return 0;