linux-kernel - [PATCH v2] fs/ext4/xattr: check the return value of ext4_xattr_inode_dec

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Message-Id: <20220917002816.3804400-1-floridsleeves@gmail.com>
Date:   Fri, 16 Sep 2022 17:28:16 -0700
From:   Li Zhong <floridsleeves@...il.com>
To:     linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org
Cc:     adilger.kernel@...ger.ca, tytso@....edu,
        Li Zhong <floridsleeves@...il.com>
Subject: [PATCH v2] fs/ext4/xattr: check the return value of ext4_xattr_inode_dec_ref()

Check the return value of ext4_xattr_inode_dec_ref(), which could return
error code and need to be warned.

Signed-off-by: Li Zhong <floridsleeves@...il.com>
---
 fs/ext4/xattr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 533216e80fa2..e6d62fd4ac31 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1540,7 +1540,8 @@ static int ext4_xattr_inode_lookup_create(handle_t *handle, struct inode *inode,
 
 	err = ext4_xattr_inode_write(handle, ea_inode, value, value_len);
 	if (err) {
-		ext4_xattr_inode_dec_ref(handle, ea_inode);
+		if (ext4_xattr_inode_dec_ref(handle, ea_inode))
+			ext4_warning_inode(ea_inode, "cleanup dec ref error %d", err);
 		iput(ea_inode);
 		return err;
 	}
-- 
2.25.1