[CIFS] fix small memory leak in an error path in new posix mkdir

There is a small memory leak in fs/cifs/inode.c::cifs_mkdir().
Storage for 'pInfo' is allocated with kzalloc(), but if the call
to CIFSPOSIXCreate(...) happens to return 0 and pInfo->Type == -1,
then we'll jump to the 'mkdir_get_info' label without freeing the
storage allocated for 'pInfo'.
This patch adds a kfree() call to free the storage just before
jumping to the label, thus getting rid of the leak.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index e800c0e..9dffa93 100644 (file)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -930,8 +930,10 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
                        d_drop(direntry);
                } else {
                        int obj_type;
-                       if (pInfo->Type == -1) /* no return info - go query */
+                       if (pInfo->Type == -1) /* no return info - go query */ {
+                               kfree(pInfo);
                                goto mkdir_get_info;
+                       }
 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
        to set uid/gid */
                        inc_nlink(inode);
@@ -941,8 +943,10 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
                                direntry->d_op = &cifs_dentry_ops;
 
                        newinode = new_inode(inode->i_sb);
-                       if (newinode == NULL)
+                       if (newinode == NULL) {
+                               kfree(pInfo);
                                goto mkdir_get_info;
+                       }
                        /* Is an i_ino of zero legal? */
                        /* Are there sanity checks we can use to ensure that
                           the server is really filling in that field? */