[PATCH] ext4: fix memory leak in ext4_fname_setup_filename() error path

[Luís Henriques]

If casefolding the filename fails, we'll be leaking fscrypt_buf name.
Make sure we free it in the error path.

Signed-off-by: Luís Henriques <lhenriques@xxxxxxx>
---
 fs/ext4/crypto.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c
index e20ac0654b3f..9e4503b051c4 100644
--- a/fs/ext4/crypto.c
+++ b/fs/ext4/crypto.c
@@ -33,6 +33,8 @@ int ext4_fname_setup_filename(struct inode *dir, const struct qstr *iname,
 
 #if IS_ENABLED(CONFIG_UNICODE)
 	err = ext4_fname_setup_ci_filename(dir, iname, fname);
+	if (err)
+		fscrypt_free_filename(&name);
 #endif
 	return err;
 }