From 51644a38f216ec8f9840f9630aa04335ffb9e6d4 Mon Sep 17 00:00:00 2001 From: Hyunwoo Kim Date: Thu, 5 Dec 2024 22:32:38 +0800 Subject: [PATCH] vsock/virtio: Initialization of the dangling pointer occurring in vsk->trans stable inclusion from stable-v5.10.230 commit eb1bdcb7dfc30b24495ee4c5533af0ed135cb5f1 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IB5AUY CVE: CVE-2024-50264 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=eb1bdcb7dfc30b24495ee4c5533af0ed135cb5f1 -------------------------------- commit 6ca575374dd9a507cdd16dfa0e78c2e9e20bd05f upstream. During loopback communication, a dangling pointer can be created in vsk->trans, potentially leading to a Use-After-Free condition. This issue is resolved by initializing vsk->trans to NULL. Cc: stable Fixes: 06a8fc78367d ("VSOCK: Introduce virtio_vsock_common.ko") Signed-off-by: Hyunwoo Kim Signed-off-by: Wongi Lee Signed-off-by: Greg Kroah-Hartman Message-Id: <2024102245-strive-crib-c8d3@gregkh> Signed-off-by: Michael S. Tsirkin Signed-off-by: Greg Kroah-Hartman Signed-off-by: Zhang Changzhong --- net/vmw_vsock/virtio_transport_common.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c index c9ee9259af48..067a7ddbcda4 100644 --- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -680,6 +680,7 @@ void virtio_transport_destruct(struct vsock_sock *vsk) struct virtio_vsock_sock *vvs = vsk->trans; kfree(vvs); + vsk->trans = NULL; } EXPORT_SYMBOL_GPL(virtio_transport_destruct); -- Gitee