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chardev: close QIOChannel before unref'ing 

The chardev socket backend will unref the QIOChannel object while
it is still potentially open. When using TLS there could be a
pending TLS handshake taking place. If the channel is left open
then when the TLS handshake callback runs, it can end up accessing
free'd memory in the tcp_chr_tls_handshake method.

Closing the QIOChannel will unregister any pending handshake
source.

Reported-by: jiangyegen <jiangyegen@huawei.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
master
Daniel P. Berrangé 2024-01-05 16:09:52 +00:00
parent 30c917b0d8
commit cb8ded0f6d
1 changed files with 4 additions and 0 deletions
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4
chardev/char-socket.c
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@ -378,6 +378,10 @@ static void tcp_chr_free_connection(Chardev *chr)
char_socket_yank_iochannel,
QIO_CHANNEL(s->sioc));
}
if (s->ioc) {
qio_channel_close(s->ioc, NULL);
}
object_unref(OBJECT(s->sioc));
s->sioc = NULL;
object_unref(OBJECT(s->ioc));