linux-kernel - [PATCH -next v2] virtio: fix possible memory leak in virtqueue

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]

Date:	Tue,  2 Aug 2016 14:16:31 +0000
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	"Michael S . Tsirkin" <mst@...hat.com>
Cc:	Wei Yongjun <weiyj.lk@...il.com>,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH -next v2] virtio: fix possible memory leak in virtqueue_add()

'desc' is malloced in virtqueue_add() and should be freed before
leaving from the error handling cases, otherwise it will cause
memory leak.

Signed-off-by: Wei Yongjun <weiyj.lk@...il.com>
---
 drivers/virtio/virtio_ring.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 114a0c8..e4be912 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -328,6 +328,8 @@ static inline int virtqueue_add(struct virtqueue *_vq,
 		if (out_sgs)
 			vq->notify(&vq->vq);
 		END_USE(vq);
+		if (indirect)
+			kfree(desc);
 		return -ENOSPC;
 	}