[PATCH 4.9 215/251] reiserfs: Add missing calls to reiserfs_security_free()

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

From: Roberto Sassu <roberto.sassu@xxxxxxxxxx>

commit 572302af1258459e124437b8f3369357447afac7 upstream.

Commit 57fe60df6241 ("reiserfs: add atomic addition of selinux attributes
during inode creation") defined reiserfs_security_free() to free the name
and value of a security xattr allocated by the active LSM through
security_old_inode_init_security(). However, this function is not called
in the reiserfs code.

Thus, add a call to reiserfs_security_free() whenever
reiserfs_security_init() is called, and initialize value to NULL, to avoid
to call kfree() on an uninitialized pointer.

Finally, remove the kfree() for the xattr name, as it is not allocated
anymore.

Fixes: 57fe60df6241 ("reiserfs: add atomic addition of selinux attributes during inode creation")
Cc: stable@xxxxxxxxxxxxxxx
Cc: Jeff Mahoney <jeffm@xxxxxxxx>
Cc: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Reported-by: Mimi Zohar <zohar@xxxxxxxxxxxxx>
Reported-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
Reviewed-by: Mimi Zohar <zohar@xxxxxxxxxxxxx>
Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 fs/reiserfs/namei.c          |    4 ++++
 fs/reiserfs/xattr_security.c |    2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -695,6 +695,7 @@ static int reiserfs_create(struct inode
 
 out_failed:
 	reiserfs_write_unlock(dir->i_sb);
+	reiserfs_security_free(&security);
 	return retval;
 }
 
@@ -778,6 +779,7 @@ static int reiserfs_mknod(struct inode *
 
 out_failed:
 	reiserfs_write_unlock(dir->i_sb);
+	reiserfs_security_free(&security);
 	return retval;
 }
 
@@ -876,6 +878,7 @@ static int reiserfs_mkdir(struct inode *
 	retval = journal_end(&th);
 out_failed:
 	reiserfs_write_unlock(dir->i_sb);
+	reiserfs_security_free(&security);
 	return retval;
 }
 
@@ -1191,6 +1194,7 @@ static int reiserfs_symlink(struct inode
 	retval = journal_end(&th);
 out_failed:
 	reiserfs_write_unlock(parent_dir->i_sb);
+	reiserfs_security_free(&security);
 	return retval;
 }
 
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -48,6 +48,7 @@ int reiserfs_security_init(struct inode
 	int error;
 
 	sec->name = NULL;
+	sec->value = NULL;
 
 	/* Don't add selinux attributes on xattrs - they'll never get used */
 	if (IS_PRIVATE(dir))
@@ -93,7 +94,6 @@ int reiserfs_security_write(struct reise
 
 void reiserfs_security_free(struct reiserfs_security_handle *sec)
 {
-	kfree(sec->name);
 	kfree(sec->value);
 	sec->name = NULL;
 	sec->value = NULL;