linux-kernel - [PATCH AUTOSEL 4.19 27/43] fuse: fix memleak in cuse_channel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191001164311.15993-27-sashal@kernel.org>
Date:   Tue,  1 Oct 2019 12:42:55 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     zhengbin <zhengbin13@...wei.com>, Hulk Robot <hulkci@...wei.com>,
        Miklos Szeredi <mszeredi@...hat.com>,
        Sasha Levin <sashal@...nel.org>, linux-fsdevel@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 27/43] fuse: fix memleak in cuse_channel_open

From: zhengbin <zhengbin13@...wei.com>

[ Upstream commit 9ad09b1976c562061636ff1e01bfc3a57aebe56b ]

If cuse_send_init fails, need to fuse_conn_put cc->fc.

cuse_channel_open->fuse_conn_init->refcount_set(&fc->count, 1)
                 ->fuse_dev_alloc->fuse_conn_get
                 ->fuse_dev_free->fuse_conn_put

Fixes: cc080e9e9be1 ("fuse: introduce per-instance fuse_dev structure")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: zhengbin <zhengbin13@...wei.com>
Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/fuse/cuse.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index 8f68181256c00..f057c213c453a 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -518,6 +518,7 @@ static int cuse_channel_open(struct inode *inode, struct file *file)
 	rc = cuse_send_init(cc);
 	if (rc) {
 		fuse_dev_free(fud);
+		fuse_conn_put(&cc->fc);
 		return rc;
 	}
 	file->private_data = fud;
-- 
2.20.1