From: Zhihao Cheng chengzhihao1@huawei.com
commit bb674a4d4de1032837fcbf860a63939e66f0b7ad upstream.
There is no need to dump authentication options while remounting, because authentication initialization can only be doing once in the first mount process. Dumping authentication mount options in remount process may cause memory leak if UBIFS has already been mounted with old authentication mount options.
Signed-off-by: Zhihao Cheng chengzhihao1@huawei.com Cc: stable@vger.kernel.org # 4.20+ Fixes: d8a22773a12c6d7 ("ubifs: Enable authentication support") Reviewed-by: Sascha Hauer s.hauer@pengutronix.de Signed-off-by: Richard Weinberger richard@nod.at Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/ubifs/super.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-)
--- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1092,14 +1092,20 @@ static int ubifs_parse_options(struct ub break; } case Opt_auth_key: - c->auth_key_name = kstrdup(args[0].from, GFP_KERNEL); - if (!c->auth_key_name) - return -ENOMEM; + if (!is_remount) { + c->auth_key_name = kstrdup(args[0].from, + GFP_KERNEL); + if (!c->auth_key_name) + return -ENOMEM; + } break; case Opt_auth_hash_name: - c->auth_hash_name = kstrdup(args[0].from, GFP_KERNEL); - if (!c->auth_hash_name) - return -ENOMEM; + if (!is_remount) { + c->auth_hash_name = kstrdup(args[0].from, + GFP_KERNEL); + if (!c->auth_hash_name) + return -ENOMEM; + } break; case Opt_ignore: break;