[PATCH] f2fs: fix ifolio memory leak in f2fs_move_inline_dirents error path

Haofeng Li
2025-09-30T09:29:53Z

From: Haofeng Li <lihaofeng@kylinos.cn>

Fixes a memory leak issue in f2fs_move_inline_dirents() where
the ifolio is not properly released in certain error paths.

Problem Analysis:
- In f2fs_try_convert_inline_dir(), ifolio is acquired via f2fs_get_inode_folio()
- When do_convert_inline_dir() fails, the caller expects ifolio to be released
- However, in f2fs_move_inline_dirents(), two specific error paths don't release ifolio

Fixes: 201a05be9628a ("f2fs: add key function to handle inline dir")
Signed-off-by: Haofeng Li <lihaofeng@kylinos.cn>
---
fs/f2fs/inline.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 58ac831ef704..2496866fc45d 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -425,7 +425,7 @@ static int f2fs_move_inline_dirents(struct inode *dir, struct folio *ifolio,
set_new_dnode(&dn, dir, ifolio, NULL, 0);
err = f2fs_reserve_block(&dn, 0);
if (err)
- goto out;
+ goto out_put_ifolio;

if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
f2fs_put_dnode(&dn);
@@ -434,7 +434,7 @@ static int f2fs_move_inline_dirents(struct inode *dir, struct folio *ifolio,
__func__, dir->i_ino, dn.data_blkaddr);
f2fs_handle_error(F2FS_F_SB(folio), ERROR_INVALID_BLKADDR);
err = -EFSCORRUPTED;
- goto out;
+ goto out_put_ifolio;
}

f2fs_folio_wait_writeback(folio, DATA, true, true);
@@ -479,6 +479,10 @@ static int f2fs_move_inline_dirents(struct inode *dir, struct folio *ifolio,
out:
f2fs_folio_put(folio, true);
return err;
+
+out_put_ifolio:
+ f2fs_folio_put(ifolio, true);
+ goto out;
}

static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
--
2.25.1