From: Zhihao Cheng <chengzhihao1@xxxxxxxxxx>
commit 47f6d9ce45b03a40c34b668a9884754c58122b39 upstream.
Fix a memory leak after dumping authentication mount options in error
handling branch.
Signed-off-by: Zhihao Cheng <chengzhihao1@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 4.20+
Fixes: d8a22773a12c6d7 ("ubifs: Enable authentication support")
Reviewed-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ubifs/super.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1141,6 +1141,18 @@ static int ubifs_parse_options(struct ub
return 0;
}
+/*
+ * ubifs_release_options - release mount parameters which have been dumped.
+ * @c: UBIFS file-system description object
+ */
+static void ubifs_release_options(struct ubifs_info *c)
+{
+ kfree(c->auth_key_name);
+ c->auth_key_name = NULL;
+ kfree(c->auth_hash_name);
+ c->auth_hash_name = NULL;
+}
+
/**
* destroy_journal - destroy journal data structures.
* @c: UBIFS file-system description object
@@ -1650,8 +1662,7 @@ static void ubifs_umount(struct ubifs_in
ubifs_lpt_free(c, 0);
ubifs_exit_authentication(c);
- kfree(c->auth_key_name);
- kfree(c->auth_hash_name);
+ ubifs_release_options(c);
kfree(c->cbuf);
kfree(c->rcvrd_mst_node);
kfree(c->mst_node);
@@ -2219,6 +2230,7 @@ out_umount:
out_unlock:
mutex_unlock(&c->umount_mutex);
out_close:
+ ubifs_release_options(c);
ubi_close_volume(c->ubi);
out:
return err;
