linux-kernel - [PATCH 2/4] ext4: return error on ext4_find_inline

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Message-Id: <20240821152324.3621860-3-cascardo@igalia.com>
Date: Wed, 21 Aug 2024 12:23:22 -0300
From: Thadeu Lima de Souza Cascardo <cascardo@...lia.com>
To: linux-ext4@...r.kernel.org
Cc: Theodore Ts'o <tytso@....edu>,
	linux-kernel@...r.kernel.org,
	Tao Ma <boyu.mt@...bao.com>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	kernel-dev@...lia.com,
	Thadeu Lima de Souza Cascardo <cascardo@...lia.com>
Subject: [PATCH 2/4] ext4: return error on ext4_find_inline_entry

In case of errors when reading an inode from disk or traversing inline
directory entries, return an error-encoded ERR_PTR instead of returning
NULL. ext4_find_inline_entry only caller, __ext4_find_entry already returns
such encoded errors.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...lia.com>
---
 fs/ext4/inline.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index e7a09a99837b..7b98b1bf1dc9 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1669,8 +1669,9 @@ struct buffer_head *ext4_find_inline_entry(struct inode *dir,
 	void *inline_start;
 	int inline_size;
 
-	if (ext4_get_inode_loc(dir, &iloc))
-		return NULL;
+	ret = ext4_get_inode_loc(dir, &iloc);
+	if (ret)
+		return ERR_PTR(ret);
 
 	down_read(&EXT4_I(dir)->xattr_sem);
 	if (!ext4_has_inline_data(dir)) {
@@ -1701,7 +1702,10 @@ struct buffer_head *ext4_find_inline_entry(struct inode *dir,
 
 out:
 	brelse(iloc.bh);
-	iloc.bh = NULL;
+	if (ret < 0)
+		iloc.bh = ERR_PTR(ret);
+	else
+		iloc.bh = NULL;
 out_find:
 	up_read(&EXT4_I(dir)->xattr_sem);
 	return iloc.bh;
-- 
2.34.1