From: Ranganath V N <vnranganath.20@gmail.com>
Date: Sat, 11 Oct 2025 06:38:29 +0000 (+0530)
Subject: fs: ext4: fix uninitialized symbols
X-Git-Tag: v6.19-rc1~161^2~56
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6640d552185f7c11235c64a832004db9af119b2d;p=thirdparty%2Fkernel%2Flinux.git

fs: ext4: fix uninitialized symbols

Fix the issue detected by the smatch tool.

fs/ext4/inode.c:3583 ext4_map_blocks_atomic_write_slow() error: uninitialized symbol 'next_pblk'.
fs/ext4/namei.c:1776 ext4_lookup() error: uninitialized symbol 'de'.
fs/ext4/namei.c:1829 ext4_get_parent() error: uninitialized symbol 'de'.
fs/ext4/namei.c:3162 ext4_rmdir() error: uninitialized symbol 'de'.
fs/ext4/namei.c:3242 __ext4_unlink() error: uninitialized symbol 'de'.
fs/ext4/namei.c:3697 ext4_find_delete_entry() error: uninitialized symbol 'de'.

These changes enhance code clarity, address static analysis tool errors.

Signed-off-by: Ranganath V N <vnranganath.20@gmail.com>
Message-ID: <20251011063830.47485-1-vnranganath.20@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index e99306a8f47ce..6356340b768de 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3544,7 +3544,7 @@ static int ext4_map_blocks_atomic_write_slow(handle_t *handle,
 	ext4_lblk_t m_lblk = map->m_lblk;
 	unsigned int m_len = map->m_len;
 	unsigned int mapped_len = 0, m_flags = 0;
-	ext4_fsblk_t next_pblk;
+	ext4_fsblk_t next_pblk = 0;
 	bool check_next_pblk = false;
 	int ret = 0;
 
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2cd36f59c9e36..045616033515a 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1762,7 +1762,7 @@ success:
 static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
 	struct inode *inode;
-	struct ext4_dir_entry_2 *de;
+	struct ext4_dir_entry_2 *de = NULL;
 	struct buffer_head *bh;
 
 	if (dentry->d_name.len > EXT4_NAME_LEN)
@@ -1818,7 +1818,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
 struct dentry *ext4_get_parent(struct dentry *child)
 {
 	__u32 ino;
-	struct ext4_dir_entry_2 * de;
+	struct ext4_dir_entry_2 * de = NULL;
 	struct buffer_head *bh;
 
 	bh = ext4_find_entry(d_inode(child), &dotdot_name, &de, NULL);
@@ -3133,7 +3133,7 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
 	int retval;
 	struct inode *inode;
 	struct buffer_head *bh;
-	struct ext4_dir_entry_2 *de;
+	struct ext4_dir_entry_2 *de = NULL;
 	handle_t *handle = NULL;
 
 	retval = ext4_emergency_state(dir->i_sb);
@@ -3224,7 +3224,7 @@ int __ext4_unlink(struct inode *dir, const struct qstr *d_name,
 {
 	int retval = -ENOENT;
 	struct buffer_head *bh;
-	struct ext4_dir_entry_2 *de;
+	struct ext4_dir_entry_2 *de = NULL;
 	handle_t *handle;
 	int skip_remove_dentry = 0;
 
@@ -3688,7 +3688,7 @@ static int ext4_find_delete_entry(handle_t *handle, struct inode *dir,
 {
 	int retval = -ENOENT;
 	struct buffer_head *bh;
-	struct ext4_dir_entry_2 *de;
+	struct ext4_dir_entry_2 *de = NULL;
 
 	bh = ext4_find_entry(dir, d_name, &de, NULL);
 	if (IS_ERR(bh))