linux-kernel - [PATCH] nfs: fix acl memory leak of posix_acl

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Date:   Fri, 18 Jun 2021 12:20:55 +0800
From:   Gao Xiang <hsiangkao@...ux.alibaba.com>
To:     linux-nfs@...r.kernel.org
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Gao Xiang <hsiangkao@...ux.alibaba.com>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna.schumaker@...app.com>,
        Christoph Hellwig <hch@...radead.org>,
        Joseph Qi <joseph.qi@...ux.alibaba.com>
Subject: [PATCH] nfs: fix acl memory leak of posix_acl_create()

When looking into another nfs xfstests report, I found acl and
default_acl in nfs3_proc_create() and nfs3_proc_mknod() error
paths are possibly leaked. Fix them in advance.

Fixes: 013cdf1088d7 ("nfs: use generic posix ACL infrastructure for v3 Posix ACLs")
Cc: Trond Myklebust <trond.myklebust@...merspace.com>
Cc: Anna Schumaker <anna.schumaker@...app.com>
Cc: Christoph Hellwig <hch@...radead.org>
Cc: Joseph Qi <joseph.qi@...ux.alibaba.com>
Signed-off-by: Gao Xiang <hsiangkao@...ux.alibaba.com>
---
If I read correctly..

 fs/nfs/nfs3proc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 5c4e23abc345..2299446b3b89 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -385,7 +385,7 @@ static void nfs3_free_createdata(struct nfs3_createdata *data)
 				break;
 
 			case NFS3_CREATE_UNCHECKED:
-				goto out;
+				goto out_release_acls;
 		}
 		nfs_fattr_init(data->res.dir_attr);
 		nfs_fattr_init(data->res.fattr);
@@ -751,7 +751,7 @@ static int nfs3_proc_readdir(struct nfs_readdir_arg *nr_arg,
 		break;
 	default:
 		status = -EINVAL;
-		goto out;
+		goto out_release_acls;
 	}
 
 	d_alias = nfs3_do_create(dir, dentry, data);
-- 
1.8.3.1