提交 559c9ac3 编写于 作者: C Chandra Seetharaman 提交者: Mark Fasheh

configfs: handle kzalloc() failure in check_perm()

check_perm() does not drop the reference to the module when kzalloc()
failure occurs.
Signed-Off-By: NChandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: NJoel Becker <joel.becker@oracle.com>
Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
上级 e2057c5a
......@@ -275,13 +275,14 @@ static int check_perm(struct inode * inode, struct file * file)
* it in file->private_data for easy access.
*/
buffer = kzalloc(sizeof(struct configfs_buffer),GFP_KERNEL);
if (buffer) {
init_MUTEX(&buffer->sem);
buffer->needs_read_fill = 1;
buffer->ops = ops;
file->private_data = buffer;
} else
if (!buffer) {
error = -ENOMEM;
goto Enomem;
}
init_MUTEX(&buffer->sem);
buffer->needs_read_fill = 1;
buffer->ops = ops;
file->private_data = buffer;
goto Done;
Einval:
......@@ -289,6 +290,7 @@ static int check_perm(struct inode * inode, struct file * file)
goto Done;
Eaccess:
error = -EACCES;
Enomem:
module_put(attr->ca_owner);
Done:
if (error && item)
......
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