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From 7932c0bd7740f4cd2aa168d3ce0199e7af7d72d5 Mon Sep 17 00:00:00 2001
Date: Fri, 17 Jul 2015 15:32:03 +0200
Subject: vhost: actually track log eventfd file
While reviewing vhost log code, I found out that log_file is never
set. Note: I haven't tested the change (QEMU doesn't use LOG_FD yet).
Fixes CVE-2015-6252.
Upstream-Status: Backport
Cc: stable@vger.kernel.org
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
---
drivers/vhost/vhost.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index a9fe859..95bdb90 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -995,6 +995,7 @@ long vhost_dev_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp)
}
if (eventfp != d->log_file) {
filep = d->log_file;
+ d->log_file = eventfp;
ctx = d->log_ctx;
d->log_ctx = eventfp ?
eventfd_ctx_fileget(eventfp) : NULL;
--
cgit v0.11.2
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