[PATCH 4.20 09/76] staging: erofs: fix memleak of inodes shared xattr array

Greg Kroah-Hartman
2019-03-08T12:55:09Z

From: Sheng Yong <shengyong1@huawei.com>

commit 3b1b5291f79d040d549d7c746669fc30e8045b9b upstream.

If it fails to read a shared xattr page, the inode's shared xattr array
is not freed. The next time the inode's xattr is accessed, the previously
allocated array is leaked.

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Fixes: b17500a0fdba ("staging: erofs: introduce xattr & acl support")
Cc: <stable@vger.kernel.org> # 4.19+
Reviewed-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/staging/erofs/xattr.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/staging/erofs/xattr.c
+++ b/drivers/staging/erofs/xattr.c
@@ -111,8 +111,11 @@ static int init_inode_xattrs(struct inod

it.page = erofs_get_meta_page(sb,
++it.blkaddr, S_ISDIR(inode->i_mode));
- if (IS_ERR(it.page))
+ if (IS_ERR(it.page)) {
+ kfree(vi->xattr_shared_xattrs);
+ vi->xattr_shared_xattrs = NULL;
return PTR_ERR(it.page);
+ }

it.kaddr = kmap_atomic(it.page);
atomic_map = true;