[libvirt] [PATCH] virsh: Null terminated the string memcpy from buffer explicitly
Eric Blake
eblake at redhat.com
Thu Jun 14 11:16:17 UTC 2012
On 06/14/2012 05:09 AM, Osier Yang wrote:
> ---
> tools/virsh.c | 6 ++++--
> 1 files changed, 4 insertions(+), 2 deletions(-)
A bit light on the commit message. Does this solve an actual crash, or
does it just silence an overactive static code analyzer?
>
> diff --git a/tools/virsh.c b/tools/virsh.c
> index 98305c0..4509020 100644
> --- a/tools/virsh.c
> +++ b/tools/virsh.c
> @@ -15069,11 +15069,13 @@ cleanup:
> VIR_FREE(device_type);
> VIR_FREE(disk_type);
> if (xml_buf) {
> - if (VIR_ALLOC_N(ret, xmlBufferLength(xml_buf)) < 0) {
> + int len = xmlBufferLength(xml_buf);
> + if (VIR_ALLOC_N(ret, len + 1) < 0) {
> virReportOOMError();
> return NULL;
> }
> - memcpy(ret, (char *)xmlBufferContent(xml_buf), xmlBufferLength(xml_buf));
> + memcpy(ret, (char *)xmlBufferContent(xml_buf), len);
> + ret[len] = '\0';
At any rate, the conversion makes sense. ACK, if you'll improve the
commit message.
--
Eric Blake eblake at redhat.com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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