linux-kernel - [PATCH v4 1/5] fuse: Fix leak in fuse_dentry

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Message-Id: <20210520154654.1791183-2-groug@kaod.org>
Date:   Thu, 20 May 2021 17:46:50 +0200
From:   Greg Kurz <groug@...d.org>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     virtualization@...ts.linux-foundation.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        virtio-fs@...hat.com, Stefan Hajnoczi <stefanha@...hat.com>,
        Max Reitz <mreitz@...hat.com>, Vivek Goyal <vgoyal@...hat.com>,
        Greg Kurz <groug@...d.org>
Subject: [PATCH v4 1/5] fuse: Fix leak in fuse_dentry_automount() error path

Some rollback was forgotten during the addition of crossmounts.

Fixes: bf109c64040f ("fuse: implement crossmounts")
Cc: mreitz@...hat.com
Signed-off-by: Greg Kurz <groug@...d.org>
---
 fs/fuse/dir.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 1b6c001a7dd1..fb2af70596c3 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -339,8 +339,11 @@ static struct vfsmount *fuse_dentry_automount(struct path *path)
 
 	/* Initialize superblock, making @mp_fi its root */
 	err = fuse_fill_super_submount(sb, mp_fi);
-	if (err)
+	if (err) {
+		fuse_conn_put(fc);
+		kfree(fm);
 		goto out_put_sb;
+	}
 
 	sb->s_flags |= SB_ACTIVE;
 	fsc->root = dget(sb->s_root);
-- 
2.26.3