linux-ext4 - [PATCH] ext2: initialize quota info in ext2_xattr

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Message-ID: <20200626054959.114177-1-cgxu519@mykernel.net>
Date:   Fri, 26 Jun 2020 13:49:59 +0800
From:   Chengguang Xu <cgxu519@...ernel.net>
To:     jack@...e.com
Cc:     linux-ext4@...r.kernel.org, Chengguang Xu <cgxu519@...ernel.net>
Subject: [PATCH] ext2: initialize quota info in ext2_xattr_set()

In order to correctly account/limit space usage, should initialize
quota info before calling quota related functions.

Signed-off-by: Chengguang Xu <cgxu519@...ernel.net>
---
 fs/ext2/xattr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 943cc469f42f..913e5c4921ec 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -437,6 +437,9 @@ ext2_xattr_set(struct inode *inode, int name_index, const char *name,
 	name_len = strlen(name);
 	if (name_len > 255 || value_len > sb->s_blocksize)
 		return -ERANGE;
+	error = dquot_initialize(inode);
+	if (error)
+		return error;
 	down_write(&EXT2_I(inode)->xattr_sem);
 	if (EXT2_I(inode)->i_file_acl) {
 		/* The inode already has an extended attribute block. */
-- 
2.26.2