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vsock/virtio: Initialization of the dangling pointer occurring in vsk->trans

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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 <stable@kernel.org>
Fixes: 06a8fc78367d ("VSOCK: Introduce virtio_vsock_common.ko")
Signed-off-by: Hyunwoo Kim <v4bel@theori.io>
Signed-off-by: Wongi Lee <qwerty@theori.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Message-Id: <2024102245-strive-crib-c8d3@gregkh>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hyunwoo Kim 2024-10-22 09:32:56 +02:00 committed by Kreciorek
parent f899a82bdb
commit 93e47c9b35
1 changed files with 1 additions and 0 deletions
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1
net/vmw_vsock/virtio_transport_common.c
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@ -691,6 +691,7 @@ void virtio_transport_destruct(struct vsock_sock *vsk)
struct virtio_vsock_sock *vvs = vsk->trans; struct virtio_vsock_sock *vvs = vsk->trans;
kfree(vvs); kfree(vvs);
vsk->trans = NULL;
} }
EXPORT_SYMBOL_GPL(virtio_transport_destruct); EXPORT_SYMBOL_GPL(virtio_transport_destruct);