From: Sheng Yong <shengyong1@huawei.com>
Date: Thu, 14 Feb 2019 06:46:36 +0000 (+0800)
Subject: staging: erofs: fix memleak of inode's shared xattr array
X-Git-Tag: rel_imx_5.10.35_2.0.0-somdevices.0~5215^2~77
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=3b1b5291f79d040d549d7c746669fc30e8045b9b;p=linux.git

staging: erofs: fix memleak of inode's shared xattr array

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>
---

diff --git a/drivers/staging/erofs/xattr.c b/drivers/staging/erofs/xattr.c
index e748df8d2b44..8c48b0ab31fd 100644
--- a/drivers/staging/erofs/xattr.c
+++ b/drivers/staging/erofs/xattr.c
@@ -111,8 +111,11 @@ static int init_inode_xattrs(struct inode *inode)
 
 			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;