[libvirt] [PATCH] Fix uninitialized value in QEMU monitor FD sending code
Eric Blake
eblake at redhat.com
Thu Jun 30 14:19:35 UTC 2011
On 06/30/2011 08:10 AM, Daniel P. Berrange wrote:
> The 'char control[CMSG_SPACE(sizeof(int))];' was not being
> wiped, so could potentially contain uninitialized bytes.
> While this was harmless in this case, it caused complaints
> from valgrind
>
> * src/qemu/qemu_monitor.c: memset 'control' variable
> in qemuMonitorIOWriteWithFD
> ---
> src/qemu/qemu_monitor.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
> index e995d97..8573262 100644
> --- a/src/qemu/qemu_monitor.c
> +++ b/src/qemu/qemu_monitor.c
> @@ -383,6 +383,7 @@ qemuMonitorIOWriteWithFD(qemuMonitorPtr mon,
> struct cmsghdr *cmsg;
>
> memset(&msg, 0, sizeof(msg));
> + memset(control, 0, sizeof(control));
>
> iov[0].iov_base = (void *)data;
> iov[0].iov_len = len;
ACK.
--
Eric Blake eblake at redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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