linux-ext4 - [PATCH v3 3/4] ext4: correct max_inline_xattr_value

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Date:   Thu, 16 Jun 2022 10:13:57 +0800
From:   Baokun Li <libaokun1@...wei.com>
To:     <linux-ext4@...r.kernel.org>
CC:     <tytso@....edu>, <adilger.kernel@...ger.ca>, <jack@...e.cz>,
        <ritesh.list@...il.com>, <lczerner@...hat.com>,
        <enwlinux@...il.com>, <linux-kernel@...r.kernel.org>,
        <yi.zhang@...wei.com>, <yebin10@...wei.com>, <yukuai3@...wei.com>,
        <libaokun1@...wei.com>
Subject: [PATCH v3 3/4] ext4: correct max_inline_xattr_value_size computing

If the ext4 inode does not have xattr space, 0 is returned in the
get_max_inline_xattr_value_size function. Otherwise, the function returns
a negative value when the inode does not contain EXT4_STATE_XATTR.

Signed-off-by: Baokun Li <libaokun1@...wei.com>
---
 fs/ext4/inline.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index cff52ff6549d..da5de43623dd 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -35,6 +35,9 @@ static int get_max_inline_xattr_value_size(struct inode *inode,
 	struct ext4_inode *raw_inode;
 	int free, min_offs;
 
+	if (!EXT4_INODE_HAS_XATTR_SPACE(inode))
+		return 0;
+
 	min_offs = EXT4_SB(inode->i_sb)->s_inode_size -
 			EXT4_GOOD_OLD_INODE_SIZE -
 			EXT4_I(inode)->i_extra_isize -
-- 
2.31.1